Journal of Hydrology最新文献_第2页

Quantifying uncertainty in groundwater recharge due to spatiotemporal rainfall and temporal evapotranspiration variability

IF 5.9 1区地球科学 Q1 ENGINEERING, CIVIL

Journal of Hydrology

Pub Date : 2025-03-14 DOI: 10.1016/j.jhydrol.2025.133089

Andrew J. Wiebe , David L. Rudolph , James R. Craig

The sustainable management of public supply wells relies to a significant degree on groundwater recharge estimates. Accuracy of these estimates will depend on the uncertainty within the largest components of the water budget, including precipitation and evapotranspiration. Quantifying this uncertainty and understanding the effect it may have on regional water balances is challenging. To examine the relative contribution of spatiotemporal rainfall variability (SRV) and annual actual evapotranspiration (AET) variability to groundwater recharge uncertainty, a method was developed to calculate a watershed stochastic vadose zone water budget within a Monte Carlo framework. The method incorporates rainfall time series generated through a semi-parametric approach that is constrained by observed local spatial rainfall correlation coefficients. Stochastic annual AET estimates are generated based on Penman-Monteith potential evapotranspiration (PET) estimates and observed variation about the Budyko curve for selected US MOPEX watersheds with

\bar{PET} / \bar{P}

ratios similar to the study area. Overland flow is estimated using streamflow records and hydrograph separation results for the study watershed. The method was applied to the Alder Creek watershed (78 km²) in southern Ontario, Canada, over a 46-year period. Results suggested that 84 % of the uncertainty in recharge was related to SRV while 16 % was related to AET. This method could be used to estimate uncertainty in recharge as a context for numerical groundwater modelling and to project changes in this uncertainty based on possible climate-change induced reductions in rainfall correlation.

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引用次数: 0

Simulation of the impacts of constructed wetlands on river flow using WSIMOD

IF 5.9 1区地球科学 Q1 ENGINEERING, CIVIL

Journal of Hydrology

Pub Date : 2025-03-14 DOI: 10.1016/j.jhydrol.2025.133065

Fangjun Peng , Leyang Liu , Yuxuan Gao , Vladimir Krivtsov , Saumya Srivastava , Barnaby Dobson , Ana Mijic

Increased demands for land use in urban development have reduced the extent of open water bodies in recent decades, leading to more frequent extreme flows in urban rivers. Urban nature-based solutions, such as constructed wetlands, have the potential to provide significant water management benefits if implemented on a large scale, well-maintained, and used sustainably. However, their actual benefits in urban water systems have not been adequately evaluated, and the underlying mechanisms remain underexplored. These limitations hinder the effective planning of the integration methods for constructed wetlands. To assess the water management benefits of constructed wetlands at the catchment scale, this study analyses river flow data collected before and after wetland construction in Enfield, London. The Water Systems Integrated Modelling (WSIMOD) framework is used to simulate the integrated catchment water cycle, and the constructed wetlands module is conceptualised and included in the WSIMOD to evaluate their interactions within the urban catchment water cycle. Scenarios are designed to assess the impacts of varying configurations and sizes of the wetlands on the river flow. The findings indicate that constructed wetlands are observed to attenuate river flow peaks and increase low flows. Constructed wetlands reduce the frequency of river flow peaks at the catchment scale; results show that in the case of Enfield, converting 1% of the catchment area to wetlands can decrease high flows (10% exceedance probability) by 18–23% and increase low flows (90% exceedance probability) by 35–50%, reducing the flashiness of the urban water cycle. Incorporating wetlands arranged in parallel exhibits superior performance in attenuating flow peaks compared to wetlands arranged in series, as the wetlands placed in parallel can provide more space to store rapidly generated runoff. The results quantified the effects of constructed wetlands on high and low flows in the urban water system, using the WSIMOD to provide recommendations on wetland connection modes for decision-making.

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引用次数: 0

Extreme high water level (EHWL) dynamics in the tidal reach of the Pearl River: Coupling between terrestrial runoff and channel geomorphic changes

IF 5.9 1区地球科学 Q1 ENGINEERING, CIVIL

Journal of Hydrology

Pub Date : 2025-03-14 DOI: 10.1016/j.jhydrol.2025.133098

Xiufang Qiu , David M. Kennedy , Peng He , Huayang Cai , Wen Wei

A flood is one of the most severe natural disasters and its threat is increasing under global climate and population change. This leads to a worldwide concern on the long-term evolution of extreme high water level (EHWL), especially in the tidal reaches of high social-economic value and complex river-tide interactions, an important quantitative index of flood intensity. Here, the EHWL dynamics in the tidal reach of the Pearl River under the couplings of runoff variations and channel geomorphic changes are examined, based on hydrological data of > 50 years. The results showed an overall decrease in the EHWL of all grades (from 0.1 to 5 %) from 1966 to 2016, and the decrease is more significant in the upstream (0.5–3.7 m in magnitude) than the downstream sub-reach (−0.3 to 0.2 m in magnitude). An improved tidal harmonic analysis model, R-TIDE, is introduced to detect the potential flood-tide interactions and their transformations. The upstream EHWL consisted mainly of the fluvial component and while it should have increased as the flood runoff intensified after 2000, it in fact reversed due to channel geomorphic changes. The role of river runoff on the downstream EHWLs is less, given a co-dominance of fluvial and tidal components and an embedding of storm surge. In the lower sub-reach, the geomorphic changes-induced decrease of the downstream EHWLs is balanced by amplified tides. Further quantification of the relative contribution of these two terms indicates a dominant role of channel geomorphic changes (∼ 68/15 % in the upstream/downstream sub-reach) on the observed decrease of the EHWLs. These findings provide new insights into EHWL dynamics and help cope with future flood disasters.

{"title":"Extreme high water level (EHWL) dynamics in the tidal reach of the Pearl River: Coupling between terrestrial runoff and channel geomorphic changes","authors":"Xiufang Qiu , David M. Kennedy , Peng He , Huayang Cai , Wen Wei","doi":"10.1016/j.jhydrol.2025.133098","DOIUrl":"10.1016/j.jhydrol.2025.133098","url":null,"abstract":"<div><div>A flood is one of the most severe natural disasters and its threat is increasing under global climate and population change. This leads to a worldwide concern on the long-term evolution of extreme high water level (EHWL), especially in the tidal reaches of high social-economic value and complex river-tide interactions, an important quantitative index of flood intensity. Here, the EHWL dynamics in the tidal reach of the Pearl River under the couplings of runoff variations and channel geomorphic changes are examined, based on hydrological data of > 50 years. The results showed an overall decrease in the EHWL of all grades (from 0.1 to 5 %) from 1966 to 2016, and the decrease is more significant in the upstream (0.5–3.7 m in magnitude) than the downstream sub-reach (−0.3 to 0.2 m in magnitude). An improved tidal harmonic analysis model, R-TIDE, is introduced to detect the potential flood-tide interactions and their transformations. The upstream EHWL consisted mainly of the fluvial component and while it should have increased as the flood runoff intensified after 2000, it in fact reversed due to channel geomorphic changes. The role of river runoff on the downstream EHWLs is less, given a co-dominance of fluvial and tidal components and an embedding of storm surge. In the lower sub-reach, the geomorphic changes-induced decrease of the downstream EHWLs is balanced by amplified tides. Further quantification of the relative contribution of these two terms indicates a dominant role of channel geomorphic changes (∼ 68/15 % in the upstream/downstream sub-reach) on the observed decrease of the EHWLs. These findings provide new insights into EHWL dynamics and help cope with future flood disasters.</div></div>","PeriodicalId":362,"journal":{"name":"Journal of Hydrology","volume":"657 ","pages":"Article 133098"},"PeriodicalIF":5.9,"publicationDate":"2025-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143654642","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Bias correcting the precipitation dynamics of regional climate models via kernel-aware 2D convolutional-long short-term memory

IF 5.9 1区地球科学 Q1 ENGINEERING, CIVIL

Journal of Hydrology

Pub Date : 2025-03-13 DOI: 10.1016/j.jhydrol.2025.133068

Vahid Nourani , Aida Hosseini Bahghanam , Hadi Pourali , Mohammad Bejani , Mekonnen Gebremichael

Some climate models face challenges covering the globe on a finer spatial scale. As a result, local studies are hindered by this limitation. This study introduces a novel spatial-based (kernel-aware) 2D Convolutional-Long Short-Term Memory (Conv-LSTM) network to enhance and bias correct spatial dynamics and generate precipitation products from Regional Climate Models (RCMs). The proposed network used 3 × 3 kernels, known as pixels that comprise nine grids for each specific point, which conduct convolutional layers to extract the features from the broad area (75 × 75 km), and LSTM networks for handling temporal dependencies. In this way, the RCM-based precipitation data were used as reference inputs, and gridded precipitation observation as target values. Since the precipitation products from the Coupled Model Intercomparison Project Phase 5 (CMIP5) of RCMs consisted of systematic biases, Empirical Quantile Mapping (EQM) was first used as the bias correction method as the pre-bias correction. This study applied 360 monthly observation precipitation and 460 bias-corrected RCM grid points covering Southern Alberta spanning from 1962 to 2006. Moreover, the proposed model was compared with the classical Feed Forward Neural Network (FFNN). Furthermore, the network’s capability spanned to the future, using Representative Concentration Pathway 4.5 till the end of this century. The results demonstrated that the proposed novel network could capture adjacent precipitation impacts on the target point and produce observation-like products with more precision by the Root Mean Squared Error (RMSE) and Determination Coefficient (DC) of 17.65 mm, 17.07 mm, 14.74 mm, and 0.60, 0.71 and 0.85 for high, low, and normal precipitation conditions, respectively.

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引用次数: 0

A Multi-model approach for remote sensing-based actual evapotranspiration mapping using Google Earth Engine (ETMapper-GEE)

IF 5.9 1区地球科学 Q1 ENGINEERING, CIVIL

Journal of Hydrology

Pub Date : 2025-03-13 DOI: 10.1016/j.jhydrol.2025.133062

Abdelrazek Elnashar , Shahab Aldin Shojaeezadeh , Tobias Karl David Weber

Accurate estimation of actual evapotranspiration (ET_a) through remote sensing (RS) is essential for effective large-scale water management. We developed an EvapoTranspiration Mapper in the Google Earth Engine environment (ETMapper-GEE) to estimate RS-ET_a using Landsat satellite data employing four models: Surface Energy Balance Algorithm for Land (SEBAL), Mapping EvapoTranspiration at high Resolution with Internalized Calibration (METRIC), surface temperature-vegetation-based triangle (TriAng), and Operational Simplified Surface Energy Balance (SSEBop). The estimation integrates extrapolation approaches (Evaporative Fraction (EF) and EvapoTranspiration Fraction (ETF)), reference ET types (grass (ET_o) and alfalfa (ET_r)), and climate forcing datasets (the fifth generation of the European ReAnalysis (ERA5-Land) and the Climate Forecast System version 2 (CFSv2)). The ETMapper was evaluated against observed data from flux towers in Germany for the period 2020 to 2022. The results showed that EF outperformed the ETF approach, with a more than an 8 % higher correlation of determination (R²) and 35 % lower Root Mean Square Error (RMSE) compared to the other approaches. Among the EF approaches, TriAng (RMSE = 1.38 mm d^-1) exhibited the best performance, followed by METRIC (1.69 mm d^-1) and SEBAL (2.07 mm d^-1). Using ETMapper with ET_o resulted in at least 4 % higher R² and reduction in RMSE by at least 29 % compared to ET_r. Forcing ETMapper with ERA5 yielded better accuracy (R² > 4 %, RMSE < 12 %) than when using CFSv2. This study provides an integrated framework for RS-ET_a estimation, supporting water-related Sustainable Development Goals, especially in agricultural contexts.

{"title":"A Multi-model approach for remote sensing-based actual evapotranspiration mapping using Google Earth Engine (ETMapper-GEE)","authors":"Abdelrazek Elnashar , Shahab Aldin Shojaeezadeh , Tobias Karl David Weber","doi":"10.1016/j.jhydrol.2025.133062","DOIUrl":"10.1016/j.jhydrol.2025.133062","url":null,"abstract":"<div><div>Accurate estimation of actual evapotranspiration (ET<sub>a</sub>) through remote sensing (RS) is essential for effective large-scale water management. We developed an EvapoTranspiration Mapper in the Google Earth Engine environment (ETMapper-GEE) to estimate RS-ET<sub>a</sub> using Landsat satellite data employing four models: Surface Energy Balance Algorithm for Land (SEBAL), Mapping EvapoTranspiration at high Resolution with Internalized Calibration (METRIC), surface temperature-vegetation-based triangle (TriAng), and Operational Simplified Surface Energy Balance (SSEBop). The estimation integrates extrapolation approaches (Evaporative Fraction (EF) and EvapoTranspiration Fraction (ETF)), reference ET types (grass (ET<sub>o</sub>) and alfalfa (ET<sub>r</sub>)), and climate forcing datasets (the fifth generation of the European ReAnalysis (ERA5-Land) and the Climate Forecast System version 2 (CFSv2)). The ETMapper was evaluated against observed data from flux towers in Germany for the period 2020 to 2022. The results showed that EF outperformed the ETF approach, with a more than an 8 % higher correlation of determination (R<sup>2</sup>) and 35 % lower Root Mean Square Error (RMSE) compared to the other approaches. Among the EF approaches, TriAng (RMSE = 1.38 mm d<sup>-1</sup>) exhibited the best performance, followed by METRIC (1.69 mm d<sup>-1</sup>) and SEBAL (2.07 mm d<sup>-1</sup>). Using ETMapper with ET<sub>o</sub> resulted in at least 4 % higher R<sup>2</sup> and reduction in RMSE by at least 29 % compared to ET<sub>r</sub>. Forcing ETMapper with ERA5 yielded better accuracy (R<sup>2</sup> > 4 %, RMSE < 12 %) than when using CFSv2. This study provides an integrated framework for RS-ET<sub>a</sub> estimation, supporting water-related Sustainable Development Goals, especially in agricultural contexts.</div></div>","PeriodicalId":362,"journal":{"name":"Journal of Hydrology","volume":"657 ","pages":"Article 133062"},"PeriodicalIF":5.9,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143654614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Global groundwater sustainability: A critical review of strategies and future pathways

IF 5.9 1区地球科学 Q1 ENGINEERING, CIVIL

Journal of Hydrology

Pub Date : 2025-03-12 DOI: 10.1016/j.jhydrol.2025.133060

Fatemeh Karandish, Sida Liu, Inge de Graaf

Groundwater is essential for sustaining life on Earth, yet it faces critical threats from unsustainable exploitation. Here, we conducted a critical analysis of 386 peer-reviewed sources to examine commonly introduced conservation measures, their feasibility, and potential implications, along with an additional assessment to explore spatial opportunities for sustainable groundwater management. A meta-analysis was also performed to investigate the major driving factors contributing to rebound effects – where increased resource efficiency let to converse effect regarding resource use – and the failures of adopted measures. Delving into the specifics of groundwater governance in the five top-consuming countries, we further identified reinforcing policies to address groundwater overexploitation and proposed necessary revisions to promote sustainability. According to the results, the effectiveness of efforts to improve groundwater productivity significantly depended on water and land scarcity, as well as strict regulatory policies, and didn’t always result in groundwater savings. Rebound effects were more likely under supply-side solutions, with potential overexploitation increases of up to 52% in 50% of cases. Although demand-side solutions reduced overexploitation rates to as low as 3%, they were still ineffective in 69% of cases for aquifer recovery in the absence of strict regulatory policies. In general, groundwater stabilization was achieved in less than 30% of the case studies, mostly when multiple measures were implemented, highlighting that no single solution category can sustainably control aquifer depletion. Addressing economic water scarcity and closing yield gaps had the potential to save groundwater and enhance food security in 25% and 75% of the world, respectively. According to the policy series in top major groundwater-consuming countries, the late initiation of recovery processes, significant conflicts between groundwater protection and national socioeconomic and political policies, predominant state-centered governance, lack of a nexus approach and integrated water management, the oversight of groundwater’s global significance, institutional corruption, and insufficient government commitment to aquifer recovery were among the most common factors reinforcing unsustainable groundwater management.

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引用次数: 0

Disentangling the dominance of atmospheric and soil water stress on vegetation productivity in global drylands

IF 5.9 1区地球科学 Q1 ENGINEERING, CIVIL

Journal of Hydrology

Pub Date : 2025-03-12 DOI: 10.1016/j.jhydrol.2025.133043

Jiahe Yu , Weiguang Wang , Zefeng Chen , Mingzhu Cao , Haiyang Qian

Atmospheric water demands and soil moisture are crucial components of vegetation water stress, especially for dryland ecosystems where water availability is a severe constraint for their sustainable development. Although the effects of water stress on vegetation productivity and the underlying ecological mechanism have been recognized extensively, the relative contribution of atmospheric and soil water stress changes on vegetation productivity are still in debate, and their temporal dynamics remain unclear. To fill this knowledge gap, here we collected remote sensing meteorological, root-zone soil moisture and vegetation productivity proxies (represented by kernel Normalized Difference Vegetation Index, kNDVI and Nirv-GPP) during the period 1982–2015 to quantify the sensitivity of vegetation productivity to atmospheric water stress (represented by vapor pressure deficit (VPD)), soil water stress (represented by root-zone soil moisture (SM)) and their interaction (represented by SM × VPD) across global drylands, based on a series of dedicated factorial experiments within random forest (RF) framework. The results showed that soil water stress exerted predominant influence on vegetation carbon uptake spatially throughout the study period. Moreover, a rising sensitivity of vegetation productivity to SM and a declining sensitivity to VPD were widely captured. We also found that atmospheric water stress dominated the temporal change in the sensitivity of vegetation productivity to their interactive effect, indicating a weakening importance of soil water stress. Our research highlights the increasing importance of atmospheric water stress and enhances our understanding of how vegetation carbon and water cycles respond to climate change in dryland ecosystems.

{"title":"Disentangling the dominance of atmospheric and soil water stress on vegetation productivity in global drylands","authors":"Jiahe Yu , Weiguang Wang , Zefeng Chen , Mingzhu Cao , Haiyang Qian","doi":"10.1016/j.jhydrol.2025.133043","DOIUrl":"10.1016/j.jhydrol.2025.133043","url":null,"abstract":"<div><div>Atmospheric water demands and soil moisture are crucial components of vegetation water stress, especially for dryland ecosystems where water availability is a severe constraint for their sustainable development. Although the effects of water stress on vegetation productivity and the underlying ecological mechanism have been recognized extensively, the relative contribution of atmospheric and soil water stress changes on vegetation productivity are still in debate, and their temporal dynamics remain unclear. To fill this knowledge gap, here we collected remote sensing meteorological, root-zone soil moisture and vegetation productivity proxies (represented by kernel Normalized Difference Vegetation Index, kNDVI and Nirv-GPP) during the period 1982–2015 to quantify the sensitivity of vegetation productivity to atmospheric water stress (represented by vapor pressure deficit (VPD)), soil water stress (represented by root-zone soil moisture (SM)) and their interaction (represented by SM × VPD) across global drylands, based on a series of dedicated factorial experiments within random forest (RF) framework. The results showed that soil water stress exerted predominant influence on vegetation carbon uptake spatially throughout the study period. Moreover, a rising sensitivity of vegetation productivity to SM and a declining sensitivity to VPD were widely captured. We also found that atmospheric water stress dominated the temporal change in the sensitivity of vegetation productivity to their interactive effect, indicating a weakening importance of soil water stress. Our research highlights the increasing importance of atmospheric water stress and enhances our understanding of how vegetation carbon and water cycles respond to climate change in dryland ecosystems.</div></div>","PeriodicalId":362,"journal":{"name":"Journal of Hydrology","volume":"657 ","pages":"Article 133043"},"PeriodicalIF":5.9,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143654611","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Qualitative assessment model for longitudinal riverbed erosion and deposition based on suspended sediment impacts and hydraulic geometry relationship

IF 5.9 1区地球科学 Q1 ENGINEERING, CIVIL

Journal of Hydrology

Pub Date : 2025-03-12 DOI: 10.1016/j.jhydrol.2025.133049

Hyunseung Kim , Hyeri Yoo , Kyungrock Paik , Dae-Hong Kim

Despite extensive research, simply predicting changes in the riverbed morphology, particularly determining whether erosion or deposition will occur, remains a significant challenge. This study introduces an analytical model that integrates hydraulic geometry with sediment transport equations to qualitatively predict the evolution of riverbed morphology in the longitudinal direction. Building on the foundational theories of Leopold and Maddock (1953), this model extends traditional hydraulic geometry by incorporating downstream exponents of suspended sediment concentration, revealing four distinct riverbed evolution patterns. This provides a comprehensive and practical understanding of sediment dynamics in rivers. The model was validated against field data and computational simulations to ensure its reliability in capturing complex fluvial geomorphological processes. This analytical model offers the advantages of simplified data requirements and enhanced flexibility, making it suitable for the preliminary assessments of detailed engineering designs and field studies. This provides insights into traditional river geomorphology phenomena, explaining why riverbeds are more dynamic than static, the sediment management challenges posed by levee-oriented river management, and the persistence of concave riverbed formations near river mouths.

{"title":"Qualitative assessment model for longitudinal riverbed erosion and deposition based on suspended sediment impacts and hydraulic geometry relationship","authors":"Hyunseung Kim , Hyeri Yoo , Kyungrock Paik , Dae-Hong Kim","doi":"10.1016/j.jhydrol.2025.133049","DOIUrl":"10.1016/j.jhydrol.2025.133049","url":null,"abstract":"<div><div>Despite extensive research, simply predicting changes in the riverbed morphology, particularly determining whether erosion or deposition will occur, remains a significant challenge. This study introduces an analytical model that integrates hydraulic geometry with sediment transport equations to qualitatively predict the evolution of riverbed morphology in the longitudinal direction. Building on the foundational theories of Leopold and Maddock (1953), this model extends traditional hydraulic geometry by incorporating downstream exponents of suspended sediment concentration, revealing four distinct riverbed evolution patterns. This provides a comprehensive and practical understanding of sediment dynamics in rivers. The model was validated against field data and computational simulations to ensure its reliability in capturing complex fluvial geomorphological processes. This analytical model offers the advantages of simplified data requirements and enhanced flexibility, making it suitable for the preliminary assessments of detailed engineering designs and field studies. This provides insights into traditional river geomorphology phenomena, explaining why riverbeds are more dynamic than static, the sediment management challenges posed by levee-oriented river management, and the persistence of concave riverbed formations near river mouths.</div></div>","PeriodicalId":362,"journal":{"name":"Journal of Hydrology","volume":"657 ","pages":"Article 133049"},"PeriodicalIF":5.9,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143636996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Exploring how coordination, robustness, and uncertainties shaping the management of multi-purpose water resources system

IF 5.9 1区地球科学 Q1 ENGINEERING, CIVIL

Journal of Hydrology

Pub Date : 2025-03-11 DOI: 10.1016/j.jhydrol.2025.133064

Kang Ren , Qiong Chen , Shengzhi Huang , Qiang Huang

Water resources systems require robust management strategies to achieve optimal performance under uncertainties while balancing conflicting objectives. However, these strategies are often derived from a single problem framing, disregarding potential errors and uncertainties that may affect their robustness. This study advances integrated operating policy design for multi-reservoir systems by exploring the robustness of different problem formulations in mitigating the effects of uncertainties on water resources management. We employe the Evolutionary Multi-objective Direct Policy Search (EMODPS) to approximate operating policies under various problem formulations of a multi-reservoir control problem. These policies were then re-evaluated over uncertain flow sets based on different robust definitions (i.e., low to high-risk aversions). Finally, we use a bottom-up scenario discovery method to disclose the states (i.e., success or failure) of the multi-reservoir system. Results show that trade-offs between the objectives of the multi-reservoir system vary significantly across different problem formulations. Although formulations with high-dimensional objectives can improve system trade-offs, they do not necessarily guarantee sufficient robustness to achieve expected performance under uncertainties. In this system, critical runoff signatures identified through bottom-up scenario discovery are independent of the chosen robustness metrics and are most likely to cause the system to cross tipping points from success to failure. These signatures should be continuously monitored and evaluated in future management efforts. This study contributes to the field by highlighting the importance of considering multiple problem formulations and their impact on the robustness of water resources management strategies.

{"title":"Exploring how coordination, robustness, and uncertainties shaping the management of multi-purpose water resources system","authors":"Kang Ren , Qiong Chen , Shengzhi Huang , Qiang Huang","doi":"10.1016/j.jhydrol.2025.133064","DOIUrl":"10.1016/j.jhydrol.2025.133064","url":null,"abstract":"<div><div>Water resources systems require robust management strategies to achieve optimal performance under uncertainties while balancing conflicting objectives. However, these strategies are often derived from a single problem framing, disregarding potential errors and uncertainties that may affect their robustness. This study advances integrated operating policy design for multi-reservoir systems by exploring the robustness of different problem formulations in mitigating the effects of uncertainties on water resources management. We employe the Evolutionary Multi-objective Direct Policy Search (EMODPS) to approximate operating policies under various problem formulations of a multi-reservoir control problem. These policies were then re-evaluated over uncertain flow sets based on different robust definitions (i.e., low to high-risk aversions). Finally, we use a bottom-up scenario discovery method to disclose the states (i.e., success or failure) of the multi-reservoir system. Results show that trade-offs between the objectives of the multi-reservoir system vary significantly across different problem formulations. Although formulations with high-dimensional objectives can improve system trade-offs, they do not necessarily guarantee sufficient robustness to achieve expected performance under uncertainties. In this system, critical runoff signatures identified through bottom-up scenario discovery are independent of the chosen robustness metrics and are most likely to cause the system to cross tipping points from success to failure. These signatures should be continuously monitored and evaluated in future management efforts. This study contributes to the field by highlighting the importance of considering multiple problem formulations and their impact on the robustness of water resources management strategies.</div></div>","PeriodicalId":362,"journal":{"name":"Journal of Hydrology","volume":"657 ","pages":"Article 133064"},"PeriodicalIF":5.9,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143621353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Quadratic relationships between the evaporation loss fraction and the root water uptake ratio in a wheat-maize rotation system 小麦-玉米轮作系统中蒸发损失率与根系吸水率之间的二次关系

IF 5.9 1区地球科学 Q1 ENGINEERING, CIVIL

Journal of Hydrology

Pub Date : 2025-03-10 DOI: 10.1016/j.jhydrol.2025.133066

Yingbo Liu , Yusen Yuan , Xiaolin Yang , Manoj Shukla , Taisheng Du

Quantifying crop water uses and non-productive water loss under irrigation conditions plays an important role in the rational distribution of water resources. The hydrogen and oxygen stable isotope methods have been used in agricultural studies to quantify root water uptake (RWU) patterns and soil evaporation losses (f). However, their relationships and mechanisms are still unclear. In this study, we used the Bayesian stable isotope mixing (MixSIAR) model to quantify RWU patterns, and the Craig-Gordon model to quantify the evaporation loss of the winter wheat-summer maize rotation system under different irrigation conditions. Results of the MixSIAR model showed that 0–40 cm soil water was the main source of the two crops, contributing more than 50 % of soil water uptake. The crop water source changes were regulated by both root development and water availability, and this combined effect was enhanced by different irrigation treatments. The root water uptake ratio at 0–20 cm showed quadratic relationships with evaporation loss fraction. The f threshold point marks the breakpoint where root water uptake is affected by relative humidity or soil water content. The variation in f between wheat and maize is related to the physiological regulation of water in different species. It could be used to monitor plant water deficit status, and to distinguish root-distribution-dependent and soil–water-availability-dependent root water uptake patterns. Our research investigates the mechanisms behind changes in crop water use patterns, which will aid in developing more rational crop rotation systems.

{"title":"Quadratic relationships between the evaporation loss fraction and the root water uptake ratio in a wheat-maize rotation system","authors":"Yingbo Liu , Yusen Yuan , Xiaolin Yang , Manoj Shukla , Taisheng Du","doi":"10.1016/j.jhydrol.2025.133066","DOIUrl":"10.1016/j.jhydrol.2025.133066","url":null,"abstract":"<div><div>Quantifying crop water uses and non-productive water loss under irrigation conditions plays an important role in the rational distribution of water resources. The hydrogen and oxygen stable isotope methods have been used in agricultural studies to quantify root water uptake (RWU) patterns and soil evaporation losses (<em>f</em>). However, their relationships and mechanisms are still unclear. In this study, we used the Bayesian stable isotope mixing (MixSIAR) model to quantify RWU patterns, and the Craig-Gordon model to quantify the evaporation loss of the winter wheat-summer maize rotation system under different irrigation conditions. Results of the MixSIAR model showed that 0–40 cm soil water was the main source of the two crops, contributing more than 50 % of soil water uptake. The crop water source changes were regulated by both root development and water availability, and this combined effect was enhanced by different irrigation treatments. The root water uptake ratio at 0–20 cm showed quadratic relationships with evaporation loss fraction. The <em>f</em> threshold point marks the breakpoint where root water uptake is affected by relative humidity or soil water content. The variation in <em>f</em> between wheat and maize is related to the physiological regulation of water in different species. It could be used to monitor plant water deficit status, and to distinguish root-distribution-dependent and soil–water-availability-dependent root water uptake patterns. Our research investigates the mechanisms behind changes in crop water use patterns, which will aid in developing more rational crop rotation systems.</div></div>","PeriodicalId":362,"journal":{"name":"Journal of Hydrology","volume":"657 ","pages":"Article 133066"},"PeriodicalIF":5.9,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143628982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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