Journal of Hydrology-Regional Studies最新文献_第2页

Integrated GIS-based multi-criteria approach for rainwater harvesting site selection in the Moulouya Basin, Morocco 基于gis的摩洛哥Moulouya流域雨水收集选址综合多准则方法

IF 5 2区地球科学 Q1 WATER RESOURCES

Journal of Hydrology-Regional Studies

Pub Date : 2026-04-01 Epub Date: 2026-01-16 DOI: 10.1016/j.ejrh.2026.103123

Amiri Mustapha , Qadem Zohair , Qadem Abdelghani , Ali Salem

Study region

Upper and middle Moulouya basin, Morocco

Study focus

In Morocco's Moulouya basin, recurrent droughts and rising temperatures have intensified the demand for surface water and the unsustainable exploitation of groundwater, particularly for agricultural purposes.This study aims to identify potential zones for rainwater harvesting (RWH) to reduce water shortages and improve water resource management in the upper and middle Moulouya basin. Geographic Information Systems (GIS), Remote sensing (RS) and WETSPASS model were integerted with Analytical Hierarchy Process (AHP) and Multi-Influencing Factor (MIF) methodologies to produce suitability maps for RWH sites.

New hydrogeological insights from the region

The results classified the study zones into five suitability classes: "unsuitable" to " very suitable", with around very suitable area 1588 km² and 2228 km² in MIF and AHP method respectively. The integrated models were validated using the receiver operating characteristic (ROC) curve and correlation coefficient, revealing area under the curve (AUC) values of 0.87 for AHP and 0.93 for MIF. The correlation coefficient was 0.79 and 0.77 in MIF and AHP, respectively, indicating moderate to high predictive accuracy, respectively. The findings of this study provide a valuable tool for decision-makers, hydrologists and planners to address water management challenges in the Moulouya basin. The integrated approaches are applicable for basins in other areas with similar hydrogical conditions particularly in regions prone to severe drought.

研究区域摩洛哥穆卢亚盆地中上游研究重点在摩洛哥穆卢亚盆地，经常性干旱和气温上升加剧了对地表水的需求和对地下水的不可持续开采，特别是用于农业目的。本研究旨在确定穆罗亚流域中上游地区潜在的雨水收集区，以减少水资源短缺和改善水资源管理。将地理信息系统（GIS）、遥感（RS）和WETSPASS模型与层次分析法（AHP）和多影响因子法（MIF）相结合，生成水源地选址适宜性图。结果将研究区划分为“不适宜”至“非常适宜”5个适宜级，MIF法和AHP法分别在非常适宜面积1588 km²和2228 km²左右。采用受试者工作特征（ROC）曲线和相关系数对综合模型进行验证，AHP和MIF的曲线下面积（AUC）分别为0.87和0.93。MIF和AHP的相关系数分别为0.79和0.77，预测准确率为中高。这项研究的发现为决策者、水文学家和规划者解决穆卢亚盆地的水管理挑战提供了一个有价值的工具。综合方法适用于具有类似水文条件的其他地区的流域，特别是容易发生严重干旱的地区。

{"title":"Integrated GIS-based multi-criteria approach for rainwater harvesting site selection in the Moulouya Basin, Morocco","authors":"Amiri Mustapha , Qadem Zohair , Qadem Abdelghani , Ali Salem","doi":"10.1016/j.ejrh.2026.103123","DOIUrl":"10.1016/j.ejrh.2026.103123","url":null,"abstract":"<div><h3>Study region</h3><div>Upper and middle Moulouya basin, Morocco</div></div><div><h3>Study focus</h3><div>In Morocco's Moulouya basin, recurrent droughts and rising temperatures have intensified the demand for surface water and the unsustainable exploitation of groundwater, particularly for agricultural purposes.This study aims to identify potential zones for rainwater harvesting (RWH) to reduce water shortages and improve water resource management in the upper and middle Moulouya basin. Geographic Information Systems (GIS), Remote sensing (RS) and WETSPASS model were integerted with Analytical Hierarchy Process (AHP) and Multi-Influencing Factor (MIF) methodologies to produce suitability maps for RWH sites.</div></div><div><h3>New hydrogeological insights from the region</h3><div>The results classified the study zones into five suitability classes: \"unsuitable\" to \" very suitable\", with around very suitable area 1588 km² and 2228 km² in MIF and AHP method respectively. The integrated models were validated using the receiver operating characteristic (ROC) curve and correlation coefficient, revealing area under the curve (AUC) values of 0.87 for AHP and 0.93 for MIF. The correlation coefficient was 0.79 and 0.77 in MIF and AHP, respectively, indicating moderate to high predictive accuracy, respectively. The findings of this study provide a valuable tool for decision-makers, hydrologists and planners to address water management challenges in the Moulouya basin. The integrated approaches are applicable for basins in other areas with similar hydrogical conditions particularly in regions prone to severe drought.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"64 ","pages":"Article 103123"},"PeriodicalIF":5.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145981423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impacts of water supply leakage and inter-basin water transfer on groundwater dynamics in Greater Jakarta 供水渗漏和流域间调水对大雅加达地下水动态的影响

IF 5 2区地球科学 Q1 WATER RESOURCES

Journal of Hydrology-Regional Studies

Pub Date : 2026-04-01 Epub Date: 2026-01-14 DOI: 10.1016/j.ejrh.2026.103121

Wulan Seizarwati , Naota Hanasaki , Saritha Padiyedath Gopalan , Taikan Oki

Study region

Greater Jakarta in the Ciliwung-Cisadane River basin, Indonesia

Study focus

Over 80 % of Jakarta's domestic water supply is imported from the Citarum River basin. Although this supply theoretically meets 65 % of current domestic water demand, approximately 46.67 % is lost through pipeline leakage. Given the large volumes involved, both leakage and inter-basin water transfer (IBWT) must be explicitly accounted in simulating Jakarta's hydrology and water resources.

New hydrological insight for this region

This study presents a refined framework for assessing water allocation and groundwater management in urbanized basins by integrating domestic water supply leakage and IBWT into a distributed hydrological model. Simulations were conducted for the Ciliwung-Cisadane River basin, covering Jakarta, at 30-arcsecond (∼1 km) resolution for the 2004–2013 period. Two leakage mechanisms were modeled: (1) LEAK1, where leakage directly recharges groundwater, and (2) LEAK2, where leakage first infiltrates the soil layer. Multiple scenarios were analyzed, including a baseline condition, leakage influence, and IBWT effects. Results show that leakage contributes 35 %-41 % (95 % confidence interval) of total groundwater recharge, with higher contributions in urban areas. IBWT reduces Jakarta's domestic water deficit by 62.5 % and increases leakage volume by 12 %. The simulations also reveal an urban groundwater recycling process in which leaked water initially intended for domestic use is unintentionally reallocated to support industrial groundwater extraction. By explicitly incorporating these urban hydrological processes, this study provides more realistic, policy-relevant insights for sustainable water resources management.

研究区域印度尼西亚Ciliwung-Cisadane河流域的大雅加达研究重点 雅加达80%以上的生活用水是从Citarum河流域进口的。虽然这种供应理论上可以满足当前生活用水需求的65% %，但由于管道泄漏，大约46.67 %的水损失了。由于涉及的水量很大，在模拟雅加达的水文和水资源时必须明确考虑渗漏和流域间调水（IBWT）。该研究通过将生活供水泄漏和IBWT整合到分布式水文模型中，提出了一个评估城市化流域水资源分配和地下水管理的完善框架。对2004-2013年期间覆盖雅加达的Ciliwung-Cisadane河流域以30角秒（~ 1 km）分辨率进行了模拟。模拟了两种渗漏机制：(1)LEAK1，渗漏直接补给地下水；(2)LEAK2，渗漏首先渗入土层。分析了多种情况，包括基线条件、泄漏影响和IBWT效应。结果表明，渗漏对地下水总补给的贡献率为35 % ~ 41 %（置信区间为95 %），城市地区的贡献率较高。IBWT将雅加达的家庭用水赤字减少了62.5% %，并使泄漏量增加了12% %。模拟还揭示了一个城市地下水循环过程，在这个过程中，最初打算用于家庭使用的泄漏水无意中被重新分配用于支持工业地下水开采。通过明确地纳入这些城市水文过程，本研究为可持续水资源管理提供了更现实的、与政策相关的见解。

{"title":"Impacts of water supply leakage and inter-basin water transfer on groundwater dynamics in Greater Jakarta","authors":"Wulan Seizarwati , Naota Hanasaki , Saritha Padiyedath Gopalan , Taikan Oki","doi":"10.1016/j.ejrh.2026.103121","DOIUrl":"10.1016/j.ejrh.2026.103121","url":null,"abstract":"<div><h3>Study region</h3><div>Greater Jakarta in the Ciliwung-Cisadane River basin, Indonesia</div></div><div><h3>Study focus</h3><div>Over 80 % of Jakarta's domestic water supply is imported from the Citarum River basin. Although this supply theoretically meets 65 % of current domestic water demand, approximately 46.67 % is lost through pipeline leakage. Given the large volumes involved, both leakage and inter-basin water transfer (IBWT) must be explicitly accounted in simulating Jakarta's hydrology and water resources.</div></div><div><h3>New hydrological insight for this region</h3><div>This study presents a refined framework for assessing water allocation and groundwater management in urbanized basins by integrating domestic water supply leakage and IBWT into a distributed hydrological model. Simulations were conducted for the Ciliwung-Cisadane River basin, covering Jakarta, at 30-arcsecond (∼1 km) resolution for the 2004–2013 period. Two leakage mechanisms were modeled: (1) LEAK1, where leakage directly recharges groundwater, and (2) LEAK2, where leakage first infiltrates the soil layer. Multiple scenarios were analyzed, including a baseline condition, leakage influence, and IBWT effects. Results show that leakage contributes 35 %-41 % (95 % confidence interval) of total groundwater recharge, with higher contributions in urban areas. IBWT reduces Jakarta's domestic water deficit by 62.5 % and increases leakage volume by 12 %. The simulations also reveal an urban groundwater recycling process in which leaked water initially intended for domestic use is unintentionally reallocated to support industrial groundwater extraction. By explicitly incorporating these urban hydrological processes, this study provides more realistic, policy-relevant insights for sustainable water resources management.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"64 ","pages":"Article 103121"},"PeriodicalIF":5.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145981421","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hydrological performance of bioretention systems under constrained subsoil: A study based on three bioretention prototypes in Paris, France 约束底土条件下生物滞留系统的水文性能：基于法国巴黎三个生物滞留原型的研究

IF 5 2区地球科学 Q1 WATER RESOURCES

Journal of Hydrology-Regional Studies

Pub Date : 2026-04-01 Epub Date: 2026-01-13 DOI: 10.1016/j.ejrh.2026.103124

Tinghao Huang , Jérémie Sage , Emmanuel Berthier , Didier Técher , Philippe Dubois , Marie-Christine Gromaire

Study region

Paris Region, France

Study focus

Nature-based solutions, such as bioretention systems, are increasingly implemented for urban runoff management. This study combined continuous monitoring with field investigations of three bioretention prototypes in Paris Region to assess their hydrological performance under constrained subsoil conditions (limited or prohibited exfiltration), identify dominant hydrologic processes and explore ways to enhance them. The prototypes consisted of: 1) An unlined system with a hydraulic loading ratio (HLR) of 13 over clay subsoil, to assess how internal water storage (IWS) may enhance exfiltration; 2) Two lined systems, designed to evaluate whether combining a low HLR of 4, fine-textured substrate, and IWS can enhance evapotranspiration (ET) as the main volume reduction mechanism.

New hydrologic insights

The three systems achieved notable runoff reduction throughout the monitoring period, despite limited or null exfiltration. For the unlined system, volume reduction was largely driven by the thickness of the IWS, with sufficiently thick IWS enabling substantial exfiltration. For lined systems, it was controlled by ET, which appeared twice as high during dry periods. A capillary barrier between transition and drainage layers enhanced soil water retention in the unlined system, yet its ET remained lower than potential ET. Silt loam substrate in lined systems supported vegetation but led to cracking issues which were mitigated by IWS. Additionally, potential water intrusion from perched groundwater lenses was identified.

研究地区：法国巴黎地区研究重点：基于自然的解决方案，如生物滞留系统，越来越多地用于城市径流管理。本研究将连续监测与实地调查相结合，在巴黎地区对三种生物滞留原型进行了评估，以评估其在受限底土条件下（限制或禁止渗漏）的水文性能，确定优势水文过程并探索增强它们的方法。原型包括：1)粘土地基上的水力加载比（HLR）为13的无衬里系统，以评估内部蓄水（IWS）如何增强渗漏；2)两个内衬系统，旨在评估低HLR(4)、细质地底物与IWS相结合是否能增强蒸散发（ET）作为主要减容机制。在整个监测期间，尽管渗漏有限或没有渗漏，但这三个系统都取得了显著的径流量减少。对于未衬套的系统，体积的减少主要是由IWS的厚度驱动的，足够厚的IWS可以实现大量的渗漏。对于有衬里的系统，它是由ET控制的，在干旱时期，ET出现了两倍的高。过渡层和排水层之间的毛细管屏障增强了无衬里系统中的土壤保水能力，但其ET仍低于潜在ET。衬里系统中的粉壤土基质支持植被，但导致裂缝问题，IWS缓解了这一问题。此外，还确定了来自悬空地下水透镜体的潜在水入侵。

{"title":"Hydrological performance of bioretention systems under constrained subsoil: A study based on three bioretention prototypes in Paris, France","authors":"Tinghao Huang , Jérémie Sage , Emmanuel Berthier , Didier Técher , Philippe Dubois , Marie-Christine Gromaire","doi":"10.1016/j.ejrh.2026.103124","DOIUrl":"10.1016/j.ejrh.2026.103124","url":null,"abstract":"<div><h3>Study region</h3><div>Paris Region, France</div></div><div><h3>Study focus</h3><div>Nature-based solutions, such as bioretention systems, are increasingly implemented for urban runoff management. This study combined continuous monitoring with field investigations of three bioretention prototypes in Paris Region to assess their hydrological performance under constrained subsoil conditions (limited or prohibited exfiltration), identify dominant hydrologic processes and explore ways to enhance them. The prototypes consisted of: 1) An unlined system with a hydraulic loading ratio (HLR) of 13 over clay subsoil, to assess how internal water storage (IWS) may enhance exfiltration; 2) Two lined systems, designed to evaluate whether combining a low HLR of 4, fine-textured substrate, and IWS can enhance evapotranspiration (ET) as the main volume reduction mechanism.</div></div><div><h3>New hydrologic insights</h3><div>The three systems achieved notable runoff reduction throughout the monitoring period, despite limited or null exfiltration. For the unlined system, volume reduction was largely driven by the thickness of the IWS, with sufficiently thick IWS enabling substantial exfiltration. For lined systems, it was controlled by ET, which appeared twice as high during dry periods. A capillary barrier between transition and drainage layers enhanced soil water retention in the unlined system, yet its ET remained lower than potential ET. Silt loam substrate in lined systems supported vegetation but led to cracking issues which were mitigated by IWS. Additionally, potential water intrusion from perched groundwater lenses was identified.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"64 ","pages":"Article 103124"},"PeriodicalIF":5.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145981420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Remote sensing-enabled machine learning for modeling turbidity in regulating lakes and reservoirs across inter-basin under Google Earth Engine 基于遥感的机器学习在谷歌地球引擎下跨流域调节湖泊和水库浊度建模

IF 5 2区地球科学 Q1 WATER RESOURCES

Journal of Hydrology-Regional Studies

Pub Date : 2026-04-01 Epub Date: 2026-01-24 DOI: 10.1016/j.ejrh.2026.103150

Can Yang , Jinyue Chen , Guoqiang Wang , Shilong Ren , Yanbo Peng , Yi Li , Jilin Men , Lei Fang , Chongyang Wang , Wanting Wang , Zhenyu Gao , Qingzhu Zhang , Qiao Wang

Study region

Two lakes and six reservoirs (Lake Nansi, Lake Dongping, Xiashan Reservoir, Menlou Reservoir, Mishan Reservoir, Datun Reservoir, Donghu Reservoir, and Shuangwangcheng Reservoir) along the Eastern Route of the South-to-North Water Diversion Project.

Study focus

A turbidity retrieval model was developed using Landsat OLI imagery and four machine learning models (RF; XGBoost; SVR; MLP) to analyze the spatiotemporal variations during 2013–2023. Furthermore, meteorological, land use, and socio-economic data were integrated to identify natural and anthropogenic factors driving long-term water quality evolution.

New hydrological insights for the region

(1) Machine learning models showed superior accuracy and generalizability in turbidity estimation, with RF achieving the best performance (R² = 0.89, RMSE = 0.10 NTU). (2) From 2013–2023, turbidity across all lakes and reservoirs exhibited a decreasing trend (-0.26 NTU/year). Spatially, the turbidity of mixed lakes (14.33–17.41 NTU) > mixed reservoirs (11.07–16.48 NTU) > regulating reservoirs (10.18–15.17 NTU). (3) During water diversion period, turbidity was lower in mixed reservoirs (11.69 vs. 13.58 NTU) but higher in mixed lakes (16.29 vs. 14.35 NTU) compared with non-diversion period, whereas regulating reservoirs exhibited no significant differences (12.88 vs. 12.50 NTU). (4) Turbidity variations across different lake and reservoir types were driven by the combined effects of natural and anthropogenic factors, although the dominant drivers varied significantly among waterbody types.

研究区域南水北调东线沿线2湖6库（南四湖、东平湖、下山水库、门楼水库、密山水库、大屯水库、东湖水库、双王城水库）利用Landsat OLI影像和4种机器学习模型（RF、XGBoost、SVR、MLP）建立浊度反演模型，分析2013-2023年浑浊度的时空变化。此外，还综合了气象、土地利用和社会经济数据，以确定驱动长期水质演变的自然和人为因素。(1)机器学习模型在浊度估计中显示出卓越的准确性和泛化性，其中RF达到了最佳性能（R²= 0.89,RMSE = 0.10 NTU）。(2) 2013-2023年，各湖泊和水库浊度呈下降趋势（-0.26 NTU/年）。空间上混合湖浊度（14.33-17.41 NTU） >； 混合水库（11.07-16.48 NTU） >； 调节水库（10.18-15.17 NTU）。(3)调水期混合水库浊度较非调水期低（11.69 vs. 13.58 NTU），混合湖浊度较高（16.29 vs. 14.35 NTU），调水期水库浊度差异不显著（12.88 vs. 12.50 NTU）。(4)不同湖泊和水库类型的浊度变化受自然和人为因素的综合影响，但主要驱动因素在不同的水体类型之间存在显著差异。

{"title":"Remote sensing-enabled machine learning for modeling turbidity in regulating lakes and reservoirs across inter-basin under Google Earth Engine","authors":"Can Yang , Jinyue Chen , Guoqiang Wang , Shilong Ren , Yanbo Peng , Yi Li , Jilin Men , Lei Fang , Chongyang Wang , Wanting Wang , Zhenyu Gao , Qingzhu Zhang , Qiao Wang","doi":"10.1016/j.ejrh.2026.103150","DOIUrl":"10.1016/j.ejrh.2026.103150","url":null,"abstract":"<div><h3>Study region</h3><div>Two lakes and six reservoirs (Lake Nansi, Lake Dongping, Xiashan Reservoir, Menlou Reservoir, Mishan Reservoir, Datun Reservoir, Donghu Reservoir, and Shuangwangcheng Reservoir) along the Eastern Route of the South-to-North Water Diversion Project.</div></div><div><h3>Study focus</h3><div>A turbidity retrieval model was developed using Landsat OLI imagery and four machine learning models (RF; XGBoost; SVR; MLP) to analyze the spatiotemporal variations during 2013–2023. Furthermore, meteorological, land use, and socio-economic data were integrated to identify natural and anthropogenic factors driving long-term water quality evolution.</div></div><div><h3>New hydrological insights for the region</h3><div>(1) Machine learning models showed superior accuracy and generalizability in turbidity estimation, with RF achieving the best performance (R² = 0.89, RMSE = 0.10 NTU). (2) From 2013–2023, turbidity across all lakes and reservoirs exhibited a decreasing trend (-0.26 NTU/year). Spatially, the turbidity of mixed lakes (14.33–17.41 NTU) > mixed reservoirs (11.07–16.48 NTU) > regulating reservoirs (10.18–15.17 NTU). (3) During water diversion period, turbidity was lower in mixed reservoirs (11.69 vs. 13.58 NTU) but higher in mixed lakes (16.29 vs. 14.35 NTU) compared with non-diversion period, whereas regulating reservoirs exhibited no significant differences (12.88 vs. 12.50 NTU). (4) Turbidity variations across different lake and reservoir types were driven by the combined effects of natural and anthropogenic factors, although the dominant drivers varied significantly among waterbody types.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"64 ","pages":"Article 103150"},"PeriodicalIF":5.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146079812","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Variation characteristics of water reserves in high mountains and surrounding areas in Arid Central Asia 中亚干旱区高山及周边地区水量变化特征

IF 5 2区地球科学 Q1 WATER RESOURCES

Journal of Hydrology-Regional Studies

Pub Date : 2026-04-01 Epub Date: 2026-01-16 DOI: 10.1016/j.ejrh.2026.103138

Bing Bai , Ping Yue , Xueyuan Ren , Qiang Zhang , Tiejun Zhang , Xin Zhang

Study region

Arid Central Asia.

Study focus

We investigated 2003–2021 trends in air temperature, precipitation, and evapotranspiration (ET) across Arid Central Asia and its high-mountain regions. Using terrestrial water storage derived from GRACE, we applied robust trend analysis and significance testing to quantify spatiotemporal variability at monthly, seasonal, and interannual scales. We further revealed contrasting terrestrial water storage responses in high-mountain areas and adjacent representative subregions under both co-directional and counter-directional changes in the climate driving and ecological vegetation regulation.

New hydrogeological insights from the region

This work provides new insights into the variability of terrestrial water storage anomalies across multiple time scales in arid Central Asia and in high elevation regions that function as inland water towers. We use terrestrial water storage derived from GRACE together with reanalysis products. Under regional warming, explanations of mountain terrestrial water storage that rely only on precipitation and evapotranspiration are insufficient, because abundant runoff from snow and glacier melt prevents a clean closure of surface and subsurface water budgets. GRACE offers an integrated, observation based measure of all water compartments and therefore adds a valuable large scale perspective. We find a marked decline of terrestrial water storage in the Tianshan Mountains of −11.13 cm/a, whereas the Kunlun and Qilian Mountains ranges show increases of 7.81 cm/a and 5.18 cm/a, respectively. A comparison of the Oases located in the Hexi Corridor and the Tarim Basin as defined in this study indicates that human activities do not always deplete water resources. With sound planning and effective institutions, well designed interventions can enhance watershed water retention and storage capacity.

研究区域：中亚干旱地区。研究重点研究了2003-2021年中亚干旱地区及其高山地区气温、降水和蒸散（ET）的 趋势。利用GRACE获取的陆地储水量，我们采用稳健趋势分析和显著性检验来量化月、季和年际尺度上的时空变异。进一步揭示了气候驱动和生态植被调控的同向和反向变化对高山区及其相邻代表性分区陆地储水量的影响。本研究为研究中亚干旱地区和具有内陆水塔功能的高海拔地区陆地蓄水异常在多个时间尺度上的变异性提供了新的见解。我们使用从GRACE获得的陆地储水和再分析产品。在区域变暖的情况下，仅依靠降水和蒸散发来解释山地陆地储水是不够的，因为来自雪和冰川融化的大量径流阻止了地表和地下水收支的完全封闭。GRACE提供了一个综合的、基于观测的所有水隔间测量，因此增加了一个有价值的大尺度视角。天山地区陆地储水量下降幅度明显，为- 11.13 cm/a，而昆仑山和祁连山地区陆地储水量分别增加了7.81 cm/a和5.18 cm/a。河西走廊绿洲与塔里木盆地绿洲的对比表明，人类活动并不总是消耗水资源。通过合理的规划和有效的制度，设计良好的干预措施可以增强流域的保水和蓄水能力。

{"title":"Variation characteristics of water reserves in high mountains and surrounding areas in Arid Central Asia","authors":"Bing Bai , Ping Yue , Xueyuan Ren , Qiang Zhang , Tiejun Zhang , Xin Zhang","doi":"10.1016/j.ejrh.2026.103138","DOIUrl":"10.1016/j.ejrh.2026.103138","url":null,"abstract":"<div><h3>Study region</h3><div>Arid Central Asia.</div></div><div><h3>Study focus</h3><div>We investigated 2003–2021 trends in air temperature, precipitation, and evapotranspiration (ET) across Arid Central Asia and its high-mountain regions. Using terrestrial water storage derived from GRACE, we applied robust trend analysis and significance testing to quantify spatiotemporal variability at monthly, seasonal, and interannual scales. We further revealed contrasting terrestrial water storage responses in high-mountain areas and adjacent representative subregions under both co-directional and counter-directional changes in the climate driving and ecological vegetation regulation.</div></div><div><h3>New hydrogeological insights from the region</h3><div>This work provides new insights into the variability of terrestrial water storage anomalies across multiple time scales in arid Central Asia and in high elevation regions that function as inland water towers. We use terrestrial water storage derived from GRACE together with reanalysis products. Under regional warming, explanations of mountain terrestrial water storage that rely only on precipitation and evapotranspiration are insufficient, because abundant runoff from snow and glacier melt prevents a clean closure of surface and subsurface water budgets. GRACE offers an integrated, observation based measure of all water compartments and therefore adds a valuable large scale perspective. We find a marked decline of terrestrial water storage in the Tianshan Mountains of −11.13 cm/a, whereas the Kunlun and Qilian Mountains ranges show increases of 7.81 cm/a and 5.18 cm/a, respectively. A comparison of the Oases located in the Hexi Corridor and the Tarim Basin as defined in this study indicates that human activities do not always deplete water resources. With sound planning and effective institutions, well designed interventions can enhance watershed water retention and storage capacity.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"64 ","pages":"Article 103138"},"PeriodicalIF":5.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145981427","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analyzing historical snow trends in interior Alaska 分析阿拉斯加内陆的历史降雪趋势

IF 5 2区地球科学 Q1 WATER RESOURCES

Journal of Hydrology-Regional Studies

Pub Date : 2026-04-01 Epub Date: 2026-01-16 DOI: 10.1016/j.ejrh.2025.103065

Anna M. Wagner , Katrina E. Bennett , Ross E. Alter , Elias J. Deeb , Nawa Raj Pradhan

Study region

The Chena River watershed in Interior Alaska, USA

Study focus

This study examines 40 years (water years 1982–2021) of snowpack characteristics to consider its hydrological implications in the 5350 km² Chena River basin. Using observations and a fine-scale physics model, we analyzed trends of snow water equivalent (SWE), snow onset and disappearance, and snow cover duration (SCD).

New hydrological insights for the region

Results indicate a decline in SWE across the modeled domain, averaging a decrease of 3 mm per decade, with larger decreases (up to 10 mm per decade) at lower elevations. While domain-averaged SWE trends were not statistically significant, observed SCD showed statistically significant decreases: −5.2, −5.0, and −4.4 days per decade at Teuchet Creek, Fairbanks F.O., and Little Chena Ridge, respectively. Notably, observations at SNOTEL stations and modeling revealed no statistically significant change in domain-averaged Rain-on-Snow (ROS) events over the 40-year period, contrasting some regional future estimates of increased ROS frequency. Peak streamflow did not consistently correlate with peak SWE levels, suggesting that other environmental factors such as ROS events and rapid temperature increases (e.g., a 10°C spike observed in 1992) are key drivers of hydrological outcomes. These findings improve understanding of complex subarctic hydrological processes impacting permafrost and highlight the need for adaptive water resource management to mitigate multi-factor risks like flooding and wildfire, requiring proactive planning.

本研究考察了40年（1982-2021年）的积雪特征，以考虑其在5350 km²的Chena河流域的水文意义。利用观测资料和精细尺度物理模型，分析了积雪水当量（SWE）、积雪起消和积雪持续时间（SCD）的变化趋势。结果表明，整个模拟区域的SWE下降，平均每十年减少3 毫米，在低海拔地区减少幅度更大（每十年减少10 毫米）。虽然区域平均SWE趋势在统计上不显著，但观测到的SCD在统计上显著减少：在Teuchet Creek， Fairbanks F.O和Little Chena Ridge分别为- 5.2,- 5.0和- 4.4天/ 10年。值得注意的是，SNOTEL站的观测和模型显示，40年来区域平均雨雪（ROS）事件在统计上没有显著变化，这与一些区域未来对ROS频率增加的估计形成了对比。峰值流量并不总是与峰值SWE水平相关，这表明其他环境因素，如ROS事件和快速温度升高（例如，1992年观测到的10°C峰值）是水文结果的关键驱动因素。这些发现提高了对影响永久冻土的复杂亚北极水文过程的理解，并强调了适应性水资源管理的必要性，以减轻洪水和野火等多因素风险，需要积极规划。

{"title":"Analyzing historical snow trends in interior Alaska","authors":"Anna M. Wagner , Katrina E. Bennett , Ross E. Alter , Elias J. Deeb , Nawa Raj Pradhan","doi":"10.1016/j.ejrh.2025.103065","DOIUrl":"10.1016/j.ejrh.2025.103065","url":null,"abstract":"<div><h3>Study region</h3><div>The Chena River watershed in Interior Alaska, USA</div></div><div><h3>Study focus</h3><div>This study examines 40 years (water years 1982–2021) of snowpack characteristics to consider its hydrological implications in the 5350 km² Chena River basin. Using observations and a fine-scale physics model, we analyzed trends of snow water equivalent (SWE), snow onset and disappearance, and snow cover duration (SCD).</div></div><div><h3>New hydrological insights for the region</h3><div>Results indicate a decline in SWE across the modeled domain, averaging a decrease of 3 mm per decade, with larger decreases (up to 10 mm per decade) at lower elevations. While domain-averaged SWE trends were not statistically significant, observed SCD showed statistically significant decreases: −5.2, −5.0, and −4.4 days per decade at Teuchet Creek, Fairbanks F.O., and Little Chena Ridge, respectively. Notably, observations at SNOTEL stations and modeling revealed no statistically significant change in domain-averaged Rain-on-Snow (ROS) events over the 40-year period, contrasting some regional future estimates of increased ROS frequency. Peak streamflow did not consistently correlate with peak SWE levels, suggesting that other environmental factors such as ROS events and rapid temperature increases (e.g., a 10°C spike observed in 1992) are key drivers of hydrological outcomes. These findings improve understanding of complex subarctic hydrological processes impacting permafrost and highlight the need for adaptive water resource management to mitigate multi-factor risks like flooding and wildfire, requiring proactive planning.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"64 ","pages":"Article 103065"},"PeriodicalIF":5.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145981422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tracing nitrate fate in Malta’s hydrogeological system using an intensive vadose-groundwater monitoring network 利用密集的水汽-地下水监测网络追踪硝酸盐在马耳他水文地质系统中的去向

IF 5 2区地球科学 Q1 WATER RESOURCES

Journal of Hydrology-Regional Studies

Pub Date : 2026-04-01 Epub Date: 2026-02-02 DOI: 10.1016/j.ejrh.2026.103162

Luca Laudi , Ofer Dahan , Manuel Sapiano , Michael Schembri , Luke Galea , Ella Busuttil , John Mangion , Tuvia Turkeltaub

Study region:

Maltese Islands

Study focus:

This study integrates five years of vadose zone (VZ) and groundwater monitoring to identify the dominant non-point sources of nitrate pollution across various agricultural systems. A network of 16 VZ monitoring stations was installed beneath six representative crops (potatoes, fodder, vegetables, vineyards, greenhouses, and orchards) to quantify nitrate buildup and storage. Groundwater samples were collected from the three major aquifer systems of Malta. The analysis couples chemical monitoring with Modified DRASTIC vulnerability modelling to determine how VZ properties, land use, and geological structure influence nitrate delivery to groundwater.

New hydrological insights for the region:

The results show that nitrate accumulation in the VZ varies strongly with crop type and geology. Potato cultivation produces the highest VZ nitrate storage and is the dominant source of nitrate loading to the MSLA, while intensive vegetable and greenhouse farming create local contamination hotspots above the Blue Clay and Coastal aquifers. Orchards and vineyards exhibit substantially lower nitrate buildup. Modified DRASTIC modelling highlights VZ thickness and nitrate storage as key controls on aquifer vulnerability. These findings clarify the coupled role of land use and subsurface structure in governing nitrate transport, providing a practical framework for identifying non-point nitrate pollution sources and enhancing groundwater management.

研究重点：本研究整合了5年的渗透带（VZ）和地下水监测，以确定各种农业系统中硝酸盐污染的主要非点源。在6种有代表性的作物（土豆、饲料、蔬菜、葡萄园、温室和果园）下安装了16个VZ监测站网络，以量化硝酸盐的积累和储存。从马耳他的三个主要含水层系统收集了地下水样本。该分析将化学监测与改进的DRASTIC脆弱性模型相结合，以确定VZ属性、土地利用和地质结构如何影响硝酸盐向地下水的输送。对该地区水文的新认识：结果表明，VZ的硝酸盐积累随作物类型和地质变化很大。马铃薯种植产生最高的VZ硝酸盐储存量，是MSLA硝酸盐负荷的主要来源，而集约化蔬菜和温室种植在蓝粘土和沿海含水层上方形成了局部污染热点。果园和葡萄园的硝酸盐含量明显较低。改进的DRASTIC模型强调了VZ厚度和硝酸盐储存是含水层脆弱性的关键控制因素。这些发现阐明了土地利用和地下结构在控制硝酸盐迁移中的耦合作用，为识别非点源硝酸盐污染源和加强地下水管理提供了实用框架。

{"title":"Tracing nitrate fate in Malta’s hydrogeological system using an intensive vadose-groundwater monitoring network","authors":"Luca Laudi , Ofer Dahan , Manuel Sapiano , Michael Schembri , Luke Galea , Ella Busuttil , John Mangion , Tuvia Turkeltaub","doi":"10.1016/j.ejrh.2026.103162","DOIUrl":"10.1016/j.ejrh.2026.103162","url":null,"abstract":"<div><h3>Study region:</h3><div>Maltese Islands</div></div><div><h3>Study focus:</h3><div>This study integrates five years of vadose zone (VZ) and groundwater monitoring to identify the dominant non-point sources of nitrate pollution across various agricultural systems. A network of 16 VZ monitoring stations was installed beneath six representative crops (potatoes, fodder, vegetables, vineyards, greenhouses, and orchards) to quantify nitrate buildup and storage. Groundwater samples were collected from the three major aquifer systems of Malta. The analysis couples chemical monitoring with Modified DRASTIC vulnerability modelling to determine how VZ properties, land use, and geological structure influence nitrate delivery to groundwater.</div></div><div><h3>New hydrological insights for the region:</h3><div>The results show that nitrate accumulation in the VZ varies strongly with crop type and geology. Potato cultivation produces the highest VZ nitrate storage and is the dominant source of nitrate loading to the MSLA, while intensive vegetable and greenhouse farming create local contamination hotspots above the Blue Clay and Coastal aquifers. Orchards and vineyards exhibit substantially lower nitrate buildup. Modified DRASTIC modelling highlights VZ thickness and nitrate storage as key controls on aquifer vulnerability. These findings clarify the coupled role of land use and subsurface structure in governing nitrate transport, providing a practical framework for identifying non-point nitrate pollution sources and enhancing groundwater management.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"64 ","pages":"Article 103162"},"PeriodicalIF":5.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146173875","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Regional patterns of streamflow persistence, complexity, and chaos indicators within the United States 美国境内河流持续性、复杂性和混乱指标的区域模式

IF 5 2区地球科学 Q1 WATER RESOURCES

Journal of Hydrology-Regional Studies

Pub Date : 2026-04-01 Epub Date: 2026-02-03 DOI: 10.1016/j.ejrh.2026.103184

Krzysztof Raczyński , Katarzyna Grala , Katarzyna Baran-Gurgul , John Cartwright , Jamie Dyer

Study Region

Streamflow records from 3135 gauging stations across the United States and Puerto Rico (1970–2023) were analyzed. Daily discharge was aggregated into non-overlapping calendar weekly, monthly, quarterly, and annual series; within each period Q_min, Q_avg, and Q_max were computed as the minimum, mean and maximum of daily discharge, respectively.

Study Focus

Streamflow integrates climatic, hydrological, and anthropogenic influences. This study characterizes how memory, complexity, and chaos indicators in streamflow vary across regions, flow regimes, and time scales. Fractal and multifractal analyses, recurrence-quantification metrics, and largest Lyapunov exponents are computed for each gauge and aggregation scale, then summarized with fuzzy C-means clustering to derive regional dynamical regimes.

New Hydrological Insights for the Region

Hurst exponents mostly between 0.75 and 0.95 indicate widespread long-range dependence, strongest for Q_min. Multifractality intensifies with temporal aggregation and is greatest for Q_max, reflecting enhanced variability in extremes. Recurrence analysis reveals a trade-off between strong recurrence structure and high dynamical complexity, with Q_avg comparatively stable across scales. Positive largest Lyapunov exponents suggest low-dimensional chaos embedded within persistent dynamics. Clustering of multifractality and recurrence metrics yields three coherent regimes: a high-persistence, low-entropy regime in the western and central United States (including Alaska), a transitional regime in the Great Plains and Appalachia, and a higher-entropy regime in the northeastern and Gulf Coast areas (including Puerto Rico). Taken together, these typologies support region-specific forecasting and water-management strategies under climate and land-use change by indicating where persistence-dominated dynamics favor long-memory model structures and where higher entropy implies shorter predictability horizons and a stronger role for probabilistic or ensemble forecasting.

研究区域分析了美国和波多黎各3135个测量站1970-2023年的流量记录。每日流量汇总为不重叠的日历周、月、季度和年系列；在每个时间段内，Qmin、Qavg和Qmax分别为日排放量的最小值、平均值和最大值。研究焦点：溪流整合了气候、水文和人为影响。本研究描述了记忆、复杂性和混沌指标在不同地区、流动状态和时间尺度上的变化。计算了各尺度和聚集尺度的分形和多重分形分析、递归量化度量和最大Lyapunov指数，然后用模糊c均值聚类进行总结，得出区域动态机制。RegionHurst指数大多在0.75 ~ 0.95之间，表明广泛的长期依赖性，Qmin最强。多重分形随着时间聚集而增强，Qmax最大，反映了极端情况下的变异性增强。递归分析揭示了强递归结构和高动态复杂性之间的权衡，Qavg在各个尺度上相对稳定。正的最大李雅普诺夫指数表明低维混沌嵌入在持续的动力学中。多重分形和重复度量的聚类产生了三种连贯的制度：美国西部和中部（包括阿拉斯加）的高持久性、低熵制度，大平原和阿巴拉契亚地区的过渡制度，以及东北部和墨西哥湾沿岸地区（包括波多黎各）的高熵制度。总而言之，这些类型学支持气候和土地利用变化下的区域特定预测和水资源管理策略，表明持久性主导的动态有利于长记忆模型结构，高熵意味着更短的可预测性范围和更强的概率或集合预测作用。

{"title":"Regional patterns of streamflow persistence, complexity, and chaos indicators within the United States","authors":"Krzysztof Raczyński , Katarzyna Grala , Katarzyna Baran-Gurgul , John Cartwright , Jamie Dyer","doi":"10.1016/j.ejrh.2026.103184","DOIUrl":"10.1016/j.ejrh.2026.103184","url":null,"abstract":"<div><h3>Study Region</h3><div>Streamflow records from 3135 gauging stations across the United States and Puerto Rico (1970–2023) were analyzed. Daily discharge was aggregated into non-overlapping calendar weekly, monthly, quarterly, and annual series; within each period <em>Q</em><sub><em>min</em></sub>, <em>Q</em><sub><em>avg</em></sub>, and <em>Q</em><sub><em>max</em></sub> were computed as the minimum, mean and maximum of daily discharge, respectively.</div></div><div><h3>Study Focus</h3><div>Streamflow integrates climatic, hydrological, and anthropogenic influences. This study characterizes how memory, complexity, and chaos indicators in streamflow vary across regions, flow regimes, and time scales. Fractal and multifractal analyses, recurrence-quantification metrics, and largest Lyapunov exponents are computed for each gauge and aggregation scale, then summarized with fuzzy C-means clustering to derive regional dynamical regimes.</div></div><div><h3>New Hydrological Insights for the Region</h3><div>Hurst exponents mostly between 0.75 and 0.95 indicate widespread long-range dependence, strongest for <em>Q</em><sub><em>min</em></sub>. Multifractality intensifies with temporal aggregation and is greatest for <em>Q</em><sub><em>max</em></sub>, reflecting enhanced variability in extremes. Recurrence analysis reveals a trade-off between strong recurrence structure and high dynamical complexity, with <em>Q</em><sub><em>avg</em></sub> comparatively stable across scales. Positive largest Lyapunov exponents suggest low-dimensional chaos embedded within persistent dynamics. Clustering of multifractality and recurrence metrics yields three coherent regimes: a high-persistence, low-entropy regime in the western and central United States (including Alaska), a transitional regime in the Great Plains and Appalachia, and a higher-entropy regime in the northeastern and Gulf Coast areas (including Puerto Rico). Taken together, these typologies support region-specific forecasting and water-management strategies under climate and land-use change by indicating where persistence-dominated dynamics favor long-memory model structures and where higher entropy implies shorter predictability horizons and a stronger role for probabilistic or ensemble forecasting.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"64 ","pages":"Article 103184"},"PeriodicalIF":5.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146173852","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Discharge-based classifications of spatio-temporal patterns of potentially gaining and losing subcatchments in the Bode River catchment, Central Germany 德国中部波德河流域潜在增减子集水区的基于流量的时空格局分类

IF 5 2区地球科学 Q1 WATER RESOURCES

Journal of Hydrology-Regional Studies

Pub Date : 2026-04-01 Epub Date: 2026-01-22 DOI: 10.1016/j.ejrh.2026.103161

Chao Lei , Stefano Basso , Matthew J. Cohen , Andreas Musolff , Larisa Tarasova , Christian Schmidt

Study Region

Bode River catchment in Central Germany

Study Focus

Streamflow shortages driven by low runoff yield and water losses from streams to groundwater are gaining attention amid rising water demand and climate change, which threaten ecosystems and water security. To identify the former phenomena at the subcatchment scale, we present a transferable conceptual approach that classifies subcatchments as high-yield (potentially gaining hotspots) or low-yield (potentially losing hotspots) based on whether their specific discharge exceeds or falls below the catchment average. The method is tested on 18 gauged subcatchments of the Bode River catchment in Central Germany across long-term, annual, and monthly timescales.

New Hydrological Insights for the Region

Lowland agricultural subcatchments are predominantly low-yield at the long-term scale, whereas mountainous forested/seminatural subcatchments are mainly high-yield. Comparison with a well-established water balance approach confirms the method’s ability to identify potentially gaining and losing hotspots while reducing uncertainty, as it relies solely on observed discharge rather than precipitation and evapotranspiration data, which are often uncertain. Seasonal analysis reveals dynamic transitions between yield states that the water balance method cannot capture: high-yield subcatchments tend to shift to low-yield in summer, while low-yield subcatchments show higher relative discharge during the same period. Annual analyses also indicate that high-yield mountainous subcatchments are more resilient to prolonged dry conditions. This study provides a proof-of-concept for a simple and transferable approach, which relies on discharge observations only to obtain spatially and temporally differentiated insights into water yield and potentially gaining and losing conditions across gauged catchments.

研究区域德国中部博德河集水区研究重点在水资源需求上升和气候变化威胁生态系统和水安全的情况下，低径流量和从溪流到地下水的水分流失导致的河流短缺日益受到关注。为了确定子集水区尺度上的前一种现象，我们提出了一种可转移的概念方法，根据子集水区的具体排放量是否超过或低于集水区的平均水平，将子集水区分类为高产（潜在的热点）或低产量（潜在的热点）。该方法在德国中部博德河集水区的18个测量子集水区进行了长期，年度和月度时间尺度的测试。在长期尺度上，低地农业亚集水区主要是低产区，而山地森林/半自然亚集水区主要是高产区。与已建立的水平衡方法的比较证实了该方法能够识别潜在的获得和失去热点，同时减少不确定性，因为它完全依赖于观测流量，而不是降水和蒸散发数据，这通常是不确定的。季节分析揭示了水量平衡法无法捕捉的产量状态之间的动态变化：高产子集水区在夏季有向低产转移的趋势，而低产子集水区同期的相对流量较高。年度分析还表明，高产山区集水区对长期干旱条件的适应能力更强。该研究为一种简单且可转移的方法提供了概念验证，该方法仅依赖于流量观测，以获得对测量集水区的水量和潜在得失情况的空间和时间差异见解。

{"title":"Discharge-based classifications of spatio-temporal patterns of potentially gaining and losing subcatchments in the Bode River catchment, Central Germany","authors":"Chao Lei , Stefano Basso , Matthew J. Cohen , Andreas Musolff , Larisa Tarasova , Christian Schmidt","doi":"10.1016/j.ejrh.2026.103161","DOIUrl":"10.1016/j.ejrh.2026.103161","url":null,"abstract":"<div><h3>Study Region</h3><div>Bode River catchment in Central Germany</div></div><div><h3>Study Focus</h3><div>Streamflow shortages driven by low runoff yield and water losses from streams to groundwater are gaining attention amid rising water demand and climate change, which threaten ecosystems and water security. To identify the former phenomena at the subcatchment scale, we present a transferable conceptual approach that classifies subcatchments as high-yield (potentially gaining hotspots) or low-yield (potentially losing hotspots) based on whether their specific discharge exceeds or falls below the catchment average. The method is tested on 18 gauged subcatchments of the Bode River catchment in Central Germany across long-term, annual, and monthly timescales.</div></div><div><h3>New Hydrological Insights for the Region</h3><div>Lowland agricultural subcatchments are predominantly low-yield at the long-term scale, whereas mountainous forested/seminatural subcatchments are mainly high-yield. Comparison with a well-established water balance approach confirms the method’s ability to identify potentially gaining and losing hotspots while reducing uncertainty, as it relies solely on observed discharge rather than precipitation and evapotranspiration data, which are often uncertain. Seasonal analysis reveals dynamic transitions between yield states that the water balance method cannot capture: high-yield subcatchments tend to shift to low-yield in summer, while low-yield subcatchments show higher relative discharge during the same period. Annual analyses also indicate that high-yield mountainous subcatchments are more resilient to prolonged dry conditions. This study provides a proof-of-concept for a simple and transferable approach, which relies on discharge observations only to obtain spatially and temporally differentiated insights into water yield and potentially gaining and losing conditions across gauged catchments.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"64 ","pages":"Article 103161"},"PeriodicalIF":5.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146024549","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Multidimensional assessment framework for water resources allocation 水资源配置多维评估框架

IF 5 2区地球科学 Q1 WATER RESOURCES

Journal of Hydrology-Regional Studies

Pub Date : 2026-04-01 Epub Date: 2026-01-23 DOI: 10.1016/j.ejrh.2026.103170

Chen Niu, Jianxia Chang, Yimin Wang, Aijun Guo, Xuebin Wang, Xuejiao Meng, Zhehao Li

Study region

The Yellow River Basin (YRB) in China.

Study focus

Efficient, equilibrial, and sustainable water allocation is essential for socio-economic development and ecological stability, especially in water-scarce regions. This study proposes a multidimensional assessment framework integrating development efficiency, spatial equilibrium, and temporal sustainability. Efficiency and equilibrium indicators, based on population, GDP, irrigable farmland, and urbanization, reflect regional development levels and disparities. The sustainability indicator, coupling water supply utility with the theory of sustainable orientation, assesses long-term stability across six dimensions: existence, effectiveness, freedom, adaptability, security, and coexistence.

New hydrological insights for the region

The evaluation results of water allocation schemes under different scenarios in the YRB demonstrate that the framework can identify and reflect the impacts of changing conditions on water allocation, showing strong stability and sensitivity. The development efficiency, spatial equilibrium, and temporal sustainability exhibit dynamic relationships, without absolute trade-offs or synergies. Increasing water availability can effectively improve development efficiency and temporal sustainability, albeit with a slight reduction in spatial equilibrium. In contrast, blindly raising in-stream ecological water use under scarcity can significantly reduce development efficiency. Adjusting industrial (water use) structure and improving water use efficiency are key to achieving efficient, equilibrial, and sustainable basin development. The framework holds broad potential for application in water-scarce basins worldwide, supporting more balanced and resilient water resource management across diverse socio-economic and ecological contexts.

研究区域：中国黄河流域。高效、平衡和可持续的水资源分配对社会经济发展和生态稳定至关重要，特别是在缺水地区。本研究提出了一个综合发展效率、空间平衡和时间可持续性的多维评估框架。基于人口、GDP、可灌溉农田和城市化的效率和均衡指标反映了区域发展水平和差异。可持续性指标将供水效用与可持续导向理论相结合，从存在、有效性、自由度、适应性、安全性和共存六个维度评估长期稳定性。长江三角洲不同情景下水资源分配方案的评价结果表明，该框架能够识别和反映条件变化对水资源分配的影响，具有较强的稳定性和敏感性。发展效率、空间平衡和时间可持续性表现为动态关系，不存在绝对的权衡或协同效应。增加水资源可利用率可以有效地提高发展效率和时间可持续性，尽管会略微降低空间平衡。相反，在稀缺性条件下，盲目提高河流内生态用水会显著降低发展效率。调整产业（用水）结构，提高用水效率是实现流域高效、均衡、可持续发展的关键。该框架在全球缺水流域具有广泛的应用潜力，支持在不同社会经济和生态背景下进行更平衡和更有弹性的水资源管理。

{"title":"Multidimensional assessment framework for water resources allocation","authors":"Chen Niu, Jianxia Chang, Yimin Wang, Aijun Guo, Xuebin Wang, Xuejiao Meng, Zhehao Li","doi":"10.1016/j.ejrh.2026.103170","DOIUrl":"10.1016/j.ejrh.2026.103170","url":null,"abstract":"<div><h3>Study region</h3><div>The Yellow River Basin (YRB) in China.</div></div><div><h3>Study focus</h3><div>Efficient, equilibrial, and sustainable water allocation is essential for socio-economic development and ecological stability, especially in water-scarce regions. This study proposes a multidimensional assessment framework integrating development efficiency, spatial equilibrium, and temporal sustainability. Efficiency and equilibrium indicators, based on population, GDP, irrigable farmland, and urbanization, reflect regional development levels and disparities. The sustainability indicator, coupling water supply utility with the theory of sustainable orientation, assesses long-term stability across six dimensions: existence, effectiveness, freedom, adaptability, security, and coexistence.</div></div><div><h3>New hydrological insights for the region</h3><div>The evaluation results of water allocation schemes under different scenarios in the YRB demonstrate that the framework can identify and reflect the impacts of changing conditions on water allocation, showing strong stability and sensitivity. The development efficiency, spatial equilibrium, and temporal sustainability exhibit dynamic relationships, without absolute trade-offs or synergies. Increasing water availability can effectively improve development efficiency and temporal sustainability, albeit with a slight reduction in spatial equilibrium. In contrast, blindly raising in-stream ecological water use under scarcity can significantly reduce development efficiency. Adjusting industrial (water use) structure and improving water use efficiency are key to achieving efficient, equilibrial, and sustainable basin development. The framework holds broad potential for application in water-scarce basins worldwide, supporting more balanced and resilient water resource management across diverse socio-economic and ecological contexts.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"64 ","pages":"Article 103170"},"PeriodicalIF":5.0,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146024590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0