Pub Date : 2025-12-01Epub Date: 2025-06-13DOI: 10.1016/j.ecohyd.2025.100673
Juan Wang, Xilin Zhao
In order to accurately assess the multi-temporal implementation of the River Chief System (RCS) policy, this study uses the Two-Stage Difference-in-Differences (DID2S) method to evaluates the influence of RCS on the water quality of Taihu Basin with the monthly data of the water quality class from 2007 to 2017. Empirical results show that the reform has not significantly improved the water quality of Taihu Basin. However, it has significantly improved the average annual compliance rate of water quality. The study further discusses the reasons from two perspectives. First, most water quality categories in functional water areas are gradually converging toward the Grade III water quality objective established by local governments. Second, the water quality development in some Water Functional Zones has become increasingly unbalanced. Areas with relatively easy-to-control pollution are gradually meeting standards, but in other areas where improvement is challenging, water quality continues to worsen. The study reveals the ‘policy distortions’ in the implementation of the RCS and provides data support for the subsequent improvement of the system.
{"title":"Goal orientation and effectiveness of water environment governance in China","authors":"Juan Wang, Xilin Zhao","doi":"10.1016/j.ecohyd.2025.100673","DOIUrl":"10.1016/j.ecohyd.2025.100673","url":null,"abstract":"<div><div>In order to accurately assess the multi-temporal implementation of the River Chief System (RCS) policy, this study uses the Two-Stage Difference-in-Differences (DID2S) method to evaluates the influence of RCS on the water quality of Taihu Basin with the monthly data of the water quality class from 2007 to 2017. Empirical results show that the reform has not significantly improved the water quality of Taihu Basin. However, it has significantly improved the average annual compliance rate of water quality. The study further discusses the reasons from two perspectives. First, most water quality categories in functional water areas are gradually converging toward the Grade III water quality objective established by local governments. Second, the water quality development in some Water Functional Zones has become increasingly unbalanced. Areas with relatively easy-to-control pollution are gradually meeting standards, but in other areas where improvement is challenging, water quality continues to worsen. The study reveals the ‘policy distortions’ in the implementation of the RCS and provides data support for the subsequent improvement of the system.</div></div>","PeriodicalId":56070,"journal":{"name":"Ecohydrology & Hydrobiology","volume":"25 4","pages":"Article 100673"},"PeriodicalIF":2.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145738783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sub-basin identification and prioritization are critical steps in addressing ecohydrological challenges, optimizing nature-based water conservation strategies, and study rainfall-runoff processes. In Ethiopia, the intense summer rainy season frequently triggers flood hazards, particularly in the Upper Awash River Basin. To mitigate these risks, detailed sub-basin assessments are essential for designing targeted intervention, such as nature-based flood management solutions. This study employed an integrated approach combining hydrological modeling, geospatial analysis, multi-criterial decision-making (MCDM), and ranking score number techniques. The HECHMS software was used to simulate rainfall runoff processes and divide the study area into sub-basins using a Digital Elevation Model (DEM). ArcGIS tools processes satellite imagery and environmental parameters to reclassify and analyze spatial data for sub-basins. The analytical Hierarchy process (AHP), implemented via R packages, assigned weights to the parameter. Then, a compound weighted rank score number (WRSN) system applied to rank sub-basins. Sub-basin-2 received the lowest composite number score marking it as the highest priority for intervention. In contrast, sub-basin-1 scored the highest, indicating lower urgency. The HEC HMS rainfall-runoff simulation showed strong agreement with observed data at outlet points. Performance metrics confirmed the model ‘s reliability: RMSE, NSE, percent Bias, and R2 were found to be 0.28,0.92, 1.02, and 0.93 at sink of the study area respectively. This methodology provides a robust framework for identifying priority sub-basins, enabling policy makers and conservationists to allocate resources effectively.
{"title":"Sub-basins identification and prioritization for ecohydrological nature-based intervention","authors":"Nigatu Chala , Yenesew Mengiste , Yohannes Zerihun","doi":"10.1016/j.ecohyd.2025.100675","DOIUrl":"10.1016/j.ecohyd.2025.100675","url":null,"abstract":"<div><div><span>Sub-basin identification and prioritization are critical steps in addressing ecohydrological challenges, optimizing nature-based water conservation strategies, and study rainfall-runoff processes. In Ethiopia, the intense summer rainy season frequently triggers flood hazards, particularly in the Upper Awash River Basin. To mitigate these risks, detailed sub-basin assessments are essential for designing targeted intervention, such as nature-based flood management solutions. This study employed an integrated approach combining hydrological modeling, geospatial analysis, multi-criterial decision-making (MCDM), and ranking score number techniques. The HEC</span><img><span><span>HMS software was used to simulate rainfall runoff processes and divide the study area into sub-basins using a Digital Elevation Model (DEM). ArcGIS tools processes satellite imagery and environmental parameters to reclassify and analyze spatial data for sub-basins. The </span>analytical Hierarchy process (AHP), implemented via R packages, assigned weights to the parameter. Then, a compound weighted rank score number (WRSN) system applied to rank sub-basins. Sub-basin-2 received the lowest composite number score marking it as the highest priority for intervention. In contrast, sub-basin-1 scored the highest, indicating lower urgency. The HEC HMS rainfall-runoff simulation showed strong agreement with observed data at outlet points. Performance metrics confirmed the model ‘s reliability: RMSE, NSE, percent Bias, and R</span><sup>2</sup><span> were found to be 0.28,0.92, 1.02, and 0.93 at sink of the study area respectively. This methodology provides a robust framework for identifying priority sub-basins, enabling policy makers and conservationists to allocate resources effectively.</span></div></div>","PeriodicalId":56070,"journal":{"name":"Ecohydrology & Hydrobiology","volume":"25 4","pages":"Article 100675"},"PeriodicalIF":2.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145738916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-01Epub Date: 2025-05-28DOI: 10.1016/j.ecohyd.2025.100671
Barbara Pawłowska
Ionic liquids (ILs) are a large group of compounds that have found applications in the pharmaceutical industry, including as solvents, or as part of API (active pharmaceutical ingredient) and IL combinations to improve drug properties. However, to date, there have been no studies to determine the simultaneous environmental effects of ILs and pharmaceuticals. Therefore, the present study was designed to determine and compare the toxicity of drugs: ibuprofen (IBU) and diclofenac (DIC) and the ionic liquid 1‑butyl‑3-methylimidazolium chloride (BMIMCl), as well as drug-ILs mixtures on 6 test organisms (Sorghum saccharatum, Lepidium sativum, Sinapis alba, Spirodela polyrhiza, Daphnia magna, Heterocypris incongruens) using biotests. The results indicate that the compounds tested may have negative effects on the test organisms. The greatest effect of the tested compounds was on the inhibition of leaf growth of Spirodela polyrhiza. The magnitude of the effect of each compound depended on the type of compound, the concentration used and the species of organism on which the compound or mixture acted.
{"title":"Effects of diclofenac, ibuprofen, ionic liquid and drug-IL mixtures on various environmental elements","authors":"Barbara Pawłowska","doi":"10.1016/j.ecohyd.2025.100671","DOIUrl":"10.1016/j.ecohyd.2025.100671","url":null,"abstract":"<div><div><span>Ionic liquids (ILs) are a large group of compounds that have found applications in the pharmaceutical industry, including as solvents, or as part of API (active pharmaceutical ingredient) and IL combinations to improve drug properties. However, to date, there have been no studies to determine the simultaneous environmental effects of ILs and pharmaceuticals. Therefore, the present study was designed to determine and compare the toxicity of drugs: ibuprofen (IBU) and diclofenac (DIC) and the ionic liquid 1‑butyl‑3-methylimidazolium chloride (BMIMCl), as well as drug-ILs mixtures on 6 test organisms (</span><span><span><span><em>Sorghum saccharatum, </em><span>Lepidium sativum</span><em>, </em></span><span>Sinapis alba</span><em>, </em></span><em>Spirodela polyrhiza</em><span><em>, </em><span>Daphnia magna</span><em>, Heterocypris incongruens</em></span></span>) using biotests. The results indicate that the compounds tested may have negative effects on the test organisms. The greatest effect of the tested compounds was on the inhibition of leaf growth of <em>Spirodela polyrhiza</em>. The magnitude of the effect of each compound depended on the type of compound, the concentration used and the species of organism on which the compound or mixture acted.</div></div>","PeriodicalId":56070,"journal":{"name":"Ecohydrology & Hydrobiology","volume":"25 4","pages":"Article 100671"},"PeriodicalIF":2.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145738952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Exotic broadleaf Acacia mangium Willd., native broadleaf Schima wallichii Choisy, and native coniferous Cunninghamia lanceolata (Lamb.) Hook are main species for vegetation restoration in southern China. To assess whether these plantations remain suitable for continued planting after more than 30 years on degraded hilly lands, we investigated the hydrological effects of their canopy, litter, and soil layers. Canopy interception was calculated by subtracting measured throughfall and stemflow from total rainfall, while the water-holding capacities of litter and soil were measured using indoor immersion and ring knife methods, respectively. Our results show that the hydrological effects of the canopy and litter layers in the two broadleaf plantations were superior to those in the coniferous C. lanceolata plantation. In 2017 and 2018, the canopy interception/precipitation ratios ranked: S. wallichii (13.1–20.7%)> A. mangium (16.2–10.2%) > C. lanceolata (11.3–11.6%). Among the three plantations, the native broadleaf species S. wallichii exhibited the highest canopy interception under extreme rainfall, suggesting it may be better suited for afforestation in southern China, where extreme rainfall events are becoming increasingly frequent. For the total effective water storage capacity of litter, the ranking was: A. mangium (4.6±2.4 t·hm⁻²) > S. wallichii (2.7±1.8 t·hm⁻²) > C. lanceolata (2.4±1.4 t·hm⁻²). Exotic A. mangium had the highest water-holding capacity in both undecomposed and decomposed litter layers, and its soil water-holding capacity was superior to the native species. These results indicate that A. mangium improves hydrological functions in litter and soil layers, conserving water, delaying surface runoff, and reducing soil erosion, while its potential invasive risks to biodiversity and ecosystem stability should also be considered. For average soil water storage capacity, the ranking was: A. mangium (6373.0±54.4 t hm-2) > C. lanceolata (5955.1±43.0 t hm-2) > S. wallichii (5909.8 ±102.4 t hm-2). Since there were no significant differences in soil hydrological effects between S. wallichii and C. lanceolata, C. lanceolata exhibited the weakest overall hydrological benefits. Our findings highlight the critical importance of selecting appropriate species for afforestation projects to optimize hydrological functions and adapt to changing rainfall patterns in southern China.
外来阔叶金合欢野生。本地阔叶木荷和本地针叶杉木(Lamb.)钩子是华南地区植被恢复的主要物种。为了评估这些人工林在退化丘陵地30多年后是否仍然适合继续种植,我们研究了它们的冠层、凋落物和土层的水文效应。冠层截留量通过从总降雨量中减去测量的穿透流量和茎流来计算,而凋落物和土壤的持水量分别采用室内浸泡法和环刀法测量。结果表明,两种阔叶林林冠层和凋落物层的水文效应均优于针叶杉木林。2017年和2018年林冠截留/降水比依次为:白桦(13.1 ~ 20.7%)、马头松(16.2 ~ 10.2%)、杉木(11.3 ~ 11.6%)。在3种人工林中,本土阔叶树种白桦在极端降雨条件下的冠层截留量最大,可能更适合极端降雨日益频繁的南方地区造林。枯枝落叶的总有效储水量排序为:A. mangium(4.6±2.4 t·hm⁻²);S. wallichii(2.7±1.8 t·hm⁻²);C. anceolata(2.4±1.4 t·hm⁻²)。在未分解凋落物层和分解凋落物层中,外来芒草的持水能力最高,其土壤持水能力优于本地种。这些结果表明,芒草具有改善凋落物和土层的水文功能,具有保水、延缓地表径流和减少土壤侵蚀的作用,但也应考虑其对生物多样性和生态系统稳定性的潜在入侵风险。土壤平均储水量排序为:马菖蒲(6373.0±54.4 t hm-2)、杉木(5955.1±43.0 t hm-2)、杉木(5909.8±102.4 t hm-2)。由于杉木和杉木的土壤水文效应没有显著差异,杉木的整体水文效益最弱。我们的研究结果强调了为中国南方的造林项目选择合适的树种对于优化水文功能和适应不断变化的降雨模式的重要性。
{"title":"Hydrological effects of three plantations in hilly regions of South China","authors":"Qian Wang , Ping Zhao , Xia Chen , Xiuhua Zhao , Liwei Zhu","doi":"10.1016/j.ecohyd.2025.100648","DOIUrl":"10.1016/j.ecohyd.2025.100648","url":null,"abstract":"<div><div>Exotic broadleaf <span><em>Acacia </em><em>mangium</em></span> Willd., native broadleaf <em>Schima wallichii</em> Choisy, and native coniferous <span><em>Cunninghamia lanceolata</em></span><span><span> (Lamb.) Hook are main species for vegetation restoration<span><span> in southern China. To assess whether these plantations remain suitable for continued planting after more than 30 years on degraded hilly lands, we investigated the hydrological effects of their canopy, litter, and soil layers. Canopy interception was calculated by subtracting measured </span>throughfall and </span></span>stemflow from total rainfall, while the water-holding capacities of litter and soil were measured using indoor immersion and ring knife methods, respectively. Our results show that the hydrological effects of the canopy and litter layers in the two broadleaf plantations were superior to those in the coniferous </span><em>C. lanceolata</em> plantation. In 2017 and 2018, the canopy interception/precipitation ratios ranked: <em>S. wallichii</em> (13.1–20.7%)> <em>A. mangium</em> (16.2–10.2%) > <em>C. lanceolata</em> (11.3–11.6%). Among the three plantations, the native broadleaf species <em>S. wallichii</em><span> exhibited the highest canopy interception under extreme rainfall, suggesting it may be better suited for afforestation in southern China, where extreme rainfall events are becoming increasingly frequent. For the total effective water storage capacity of litter, the ranking was: </span><em>A. mangium</em> (4.6±2.4 t·hm⁻²) > <em>S. wallichii</em> (2.7±1.8 t·hm⁻²) > <em>C. lanceolata</em> (2.4±1.4 t·hm⁻²). Exotic <em>A. mangium</em> had the highest water-holding capacity in both undecomposed and decomposed litter layers, and its soil water-holding capacity was superior to the native species. These results indicate that <em>A. mangium</em><span><span> improves hydrological functions in litter and soil layers, conserving water, delaying surface runoff, and reducing soil erosion, while its potential invasive risks to biodiversity and ecosystem stability should also be considered. For average </span>soil water storage capacity, the ranking was: </span><em>A. mangium</em> (6373.0±54.4 t hm<sup>-2</sup>) > <em>C. lanceolata</em> (5955.1±43.0 t hm<sup>-2</sup>) > <em>S. wallichii</em> (5909.8 ±102.4 t hm<sup>-2</sup>). Since there were no significant differences in soil hydrological effects between <em>S. wallichii</em> and <em>C. lanceolata, C. lanceolata</em> exhibited the weakest overall hydrological benefits. Our findings highlight the critical importance of selecting appropriate species for afforestation projects to optimize hydrological functions and adapt to changing rainfall patterns in southern China.</div></div>","PeriodicalId":56070,"journal":{"name":"Ecohydrology & Hydrobiology","volume":"25 4","pages":"Article 100648"},"PeriodicalIF":2.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145738920","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-01Epub Date: 2025-10-22DOI: 10.1016/j.ecohyd.2025.100700
Laura Cambronero , Yang Yu , Jesús Rodrigo-Comino
In land management and precision viticulture (PV), the integration of Geographic Information Systems (GIS) and remote sensing has enabled the detailed study of geomorphological processes and hydrological patterns across multiple scales. Despite its potential, this approach remains underutilized compared to applications like pest control, disease detection, and vegetation assessment. This research addresses this gap by proposing a multiscale fluvio-geomorphological and hydrological analysis to enhance sustainable soil management and vineyard conservation. Using open-access national remote sensing data (Digital Surface Models) and drone-based imagery, a 48 km² watershed and a 1 km-long vineyard plantation were analyzed. The results revealed an elongated watershed with steep slopes and high drainage density, influencing sediment deposition and flow direction, which directly affect the vineyard plantation. The watershed exhibited a predominant northward flow (26.2 %), while vineyard-level flows varied, primarily toward the east (20 %) and northwest (16.5 %), affecting the roads, and flow paths. The Index of Connectivity (IC) highlighted higher hydrological connectivity in the vineyard, with 85.4 % classified as high IC, compared to 18.1 % in the broader watershed. These findings highlight the need to incorporate geomorphological processes into PV and land management to avoid misunderstandings. By analyzing hydrological connectivity and sediment transport at multiple scales, this study reinforces the understanding of the processes that shape vineyard landscapes and provides a basis for future research aimed at integrating this knowledge into soil conservation and sustainable management strategies.
{"title":"Scaling up analysis of human impacts on hydrological connectivity in Mediterranean viticultural landscapes: From hillslope to a watershed perspective","authors":"Laura Cambronero , Yang Yu , Jesús Rodrigo-Comino","doi":"10.1016/j.ecohyd.2025.100700","DOIUrl":"10.1016/j.ecohyd.2025.100700","url":null,"abstract":"<div><div>In land management and precision viticulture (PV), the integration of Geographic Information Systems (GIS) and remote sensing has enabled the detailed study of geomorphological processes and hydrological patterns across multiple scales. Despite its potential, this approach remains underutilized compared to applications like pest control, disease detection, and vegetation assessment. This research addresses this gap by proposing a multiscale fluvio-geomorphological and hydrological analysis to enhance sustainable soil management and vineyard conservation. Using open-access national remote sensing data (Digital Surface Models) and drone-based imagery, a 48 km² watershed and a 1 km-long vineyard plantation were analyzed. The results revealed an elongated watershed with steep slopes and high drainage density, influencing sediment deposition and flow direction, which directly affect the vineyard plantation. The watershed exhibited a predominant northward flow (26.2 %), while vineyard-level flows varied, primarily toward the east (20 %) and northwest (16.5 %), affecting the roads, and flow paths. The Index of Connectivity (IC) highlighted higher hydrological connectivity in the vineyard, with 85.4 % classified as high IC, compared to 18.1 % in the broader watershed. These findings highlight the need to incorporate geomorphological processes into PV and land management to avoid misunderstandings. By analyzing hydrological connectivity and sediment transport at multiple scales, this study reinforces the understanding of the processes that shape vineyard landscapes and provides a basis for future research aimed at integrating this knowledge into soil conservation and sustainable management strategies.</div></div>","PeriodicalId":56070,"journal":{"name":"Ecohydrology & Hydrobiology","volume":"25 4","pages":"Article 100700"},"PeriodicalIF":2.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145739118","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-01Epub Date: 2025-09-30DOI: 10.1016/j.ecohyd.2025.100698
Grite Nelson Mwaijengo
The unique branching geometry of river networks distinguishes them from other ecological systems and strongly influences key ecological processes. Yet, models that explicitly account for dendritic structure and flow direction remain underused. We applied a spatial stream network model (SSNM) to examine spatial patterns of water chemistry and benthic macroinvertebrates in the Usa-Kikuletwa River catchment, northeastern Tanzania, using data from 40 monitoring sites. SSNMs incorporate hydrologic distances among flow-connected, flow-unconnected, and Euclidean sites, enabling explicit representation of river network dependencies. We found spatial autocorrelation in both water chemistry and macroinvertebrate indices at fine (≤2 km) and broad (>10 km) scales. SSNMs explained up to 31.7% of variance, outperforming Euclidean models. Broad-scale tail-up (upstream flow-connected) models highlighted the role of upstream processes and hydrological connectivity in water chemistry, while tail-down (downstream-directed) models better explained macroinvertebrate variation, suggesting influences of dispersal, drift, and broad-scale landscape factors. Our findings demonstrate the utility of SSNMs for capturing dendritic spatial dependencies and improving predictions in Afro-tropical river systems.
{"title":"Connecting the dots: Spatial connectivity and ecological dynamics in a tropical river catchment","authors":"Grite Nelson Mwaijengo","doi":"10.1016/j.ecohyd.2025.100698","DOIUrl":"10.1016/j.ecohyd.2025.100698","url":null,"abstract":"<div><div>The unique branching geometry of river networks distinguishes them from other ecological systems and strongly influences key ecological processes. Yet, models that explicitly account for dendritic structure and flow direction remain underused. We applied a spatial stream network model (SSNM) to examine spatial patterns of water chemistry and benthic macroinvertebrates in the Usa-Kikuletwa River catchment, northeastern Tanzania, using data from 40 monitoring sites. SSNMs incorporate hydrologic distances among flow-connected, flow-unconnected, and Euclidean sites, enabling explicit representation of river network dependencies. We found spatial autocorrelation in both water chemistry and macroinvertebrate indices at fine (≤2 km) and broad (>10 km) scales. SSNMs explained up to 31.7% of variance, outperforming Euclidean models. Broad-scale tail-up (upstream flow-connected) models highlighted the role of upstream processes and hydrological connectivity in water chemistry, while tail-down (downstream-directed) models better explained macroinvertebrate variation, suggesting influences of dispersal, drift, and broad-scale landscape factors. Our findings demonstrate the utility of SSNMs for capturing dendritic spatial dependencies and improving predictions in Afro-tropical river systems.</div></div>","PeriodicalId":56070,"journal":{"name":"Ecohydrology & Hydrobiology","volume":"25 4","pages":"Article 100698"},"PeriodicalIF":2.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145739119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-01Epub Date: 2025-04-03DOI: 10.1016/j.ecohyd.2025.100656
Yajie Yang , Qiwei Ma
Rapid urbanization has led to the expansion of urban construction land, severely disrupting the stability of water and terrestrial ecosystems. Effectively balancing water ecosystem and terrestrial ecosystem has become a critical issue for high-quality urban development. This study focuses on the Ecological Green Integration Demonstration zone (EGIDZ) in the Yangtze River Delta, China as the research area. This research first establishes a comprehensive ES evaluation system from the perspectives of water ecosystem services (ESs) and terrestrial ESs, and evaluates them using the InVEST model. Secondly, hotspot analysis is employed to analyze the spatial clustering characteristics of the comprehensive water ESs and terrestrial ESs. Using the four-quadrant model, a coordinate system was established with water ES as the X-axis and terrestrial ES as the Y-axis, classifying the study area into four types: high water ES-high terrestrial ES, high water ES-low terrestrial ES, low water ES-high terrestrial ES, and low water ES-low terrestrial ES. Hotspot analysis was conducted using ArcGIS 10.8 to extract the spatial relationships between water-terrestrial hotspots and coldspots, which were then mapped onto the four-quadrant model. Based on Z-values, hotspot areas (Z > 1.65) were categorized as surplus areas, coldspot areas (Z < -1.65) as deficit areas, and non-significant areas as balance areas. Third, based on an analysis of ESF directions, hubs are extracted by assessing the characteristics of supply-demand between surplus and deficit areas. Then, using circuit theory, the BGIN is constructed based on hubs and resistance surface. The resistance surfaces include a water resistance surface and a terrestrial resistance surface, both of which are constructed by equally weighting and overlaying three resistance factors with comparable influence. This facilitating ecological flows from surplus hubs to deficit hubs and achieving a dynamic balance between them. Finally, ecological management zoning was conducted for sustainable ecological protection and urban development. Results identified 147 water-dominated ESFs and 148 terrestrial-dominated ESFs, forming a uniform network structure. Stability and connectivity tests through random and targeted attacks confirm that BGIN exhibits greater resilience and connectivity than only blue or green infrastructure networks.
{"title":"From deficit to balance: Identifying blue-green infrastructure networks based on trade-offs and synergies between water and terrestrial ecosystem services in a water sensitive region","authors":"Yajie Yang , Qiwei Ma","doi":"10.1016/j.ecohyd.2025.100656","DOIUrl":"10.1016/j.ecohyd.2025.100656","url":null,"abstract":"<div><div><span>Rapid urbanization has led to the expansion of urban construction land, severely disrupting the stability of water and terrestrial ecosystems. Effectively balancing water ecosystem and terrestrial ecosystem has become a critical issue for high-quality urban development. This study focuses on the Ecological Green Integration Demonstration zone (EGIDZ) in the Yangtze River Delta, China as the research area. This research first establishes a comprehensive ES evaluation system from the perspectives of water ecosystem services (ESs) and terrestrial ESs, and evaluates them using the InVEST model. Secondly, hotspot analysis is employed to analyze the spatial clustering characteristics of the comprehensive water ESs and terrestrial ESs. Using the four-quadrant model, a coordinate system was established with water ES as the X-axis and terrestrial ES as the Y-axis, classifying the study area into four types: high water ES-high terrestrial ES, high water ES-low terrestrial ES, low water ES-high terrestrial ES, and low water ES-low terrestrial ES. Hotspot analysis was conducted using ArcGIS 10.8 to extract the spatial relationships between water-terrestrial hotspots and coldspots, which were then mapped onto the four-quadrant model. Based on Z-values, hotspot areas (</span><em>Z</em> > 1.65) were categorized as surplus areas, coldspot areas (<em>Z</em><span> < -1.65) as deficit areas, and non-significant areas as balance areas. Third, based on an analysis of ESF directions, hubs are extracted by assessing the characteristics of supply-demand between surplus and deficit areas. Then, using circuit theory, the BGIN is constructed based on hubs and resistance surface. The resistance surfaces include a water resistance surface and a terrestrial resistance surface, both of which are constructed by equally weighting and overlaying three resistance factors with comparable influence. This facilitating ecological flows from surplus hubs to deficit hubs and achieving a dynamic balance between them. Finally, ecological management zoning was conducted for sustainable ecological protection and urban development. Results identified 147 water-dominated ESFs and 148 terrestrial-dominated ESFs, forming a uniform network structure. Stability and connectivity tests through random and targeted attacks confirm that BGIN exhibits greater resilience and connectivity than only blue or green infrastructure networks.</span></div></div>","PeriodicalId":56070,"journal":{"name":"Ecohydrology & Hydrobiology","volume":"25 4","pages":"Article 100656"},"PeriodicalIF":2.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145739217","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-01Epub Date: 2025-08-14DOI: 10.1016/j.ecohyd.2025.100689
Paulos Lukas , Assefa M. Melesse , Tadesse Tujuba Kenea
The evaluation of a river basin's water balance and related hydrological processes is crucial for managing, monitoring, and predicting water resources as well as using them sustainably. The main objective of this study is to model and evaluate the response of hydrological components to land use/land cover dynamics via hydrological and remote sensing techniques in the Upper Omo-Gibe River Basin, Ethiopia. The sensitive parameters for the model simulation were thoroughly examined and selected. The findings provide significant information on the response of water balance components to LULC change. Between 1997 and 2004, it was observed that the primary factors accelerating the transformation were a rapid increase in agricultural land (46.89 %) and a significant loss of forest cover. Surface runoff (Surf_Q) increased a (4.7 %); increase whereas groundwater recharge (Gw_Q) and lateral flow (Lat_Q) decreased (17.63 %) and (9.54 %), respectively. The model simulation results revealed that surface runoff, evapotranspiration, lateral flow, and groundwater recharge accounted for 22.07 %, 43.95 %, 0.83 %, and 28.88 %, respectively, of the total flow in the present study. The increase in impervious surfaces due to intensified land competition among various sectors contributes to the reduction in the infiltration of water into the ground and accelerates Surf_Q in the catchment. Therefore, local, regional, and national policy interventions are needed to ensure efficient planning for water resource management in the Gibe-III catchment of the Omo-Gibe River Basin.
{"title":"Spatiotemporal response of water balance components under projected land use/land cover change in the Upper Omo-Gibe River Basin, Ethiopia","authors":"Paulos Lukas , Assefa M. Melesse , Tadesse Tujuba Kenea","doi":"10.1016/j.ecohyd.2025.100689","DOIUrl":"10.1016/j.ecohyd.2025.100689","url":null,"abstract":"<div><div>The evaluation of a river basin's water balance and related hydrological processes is crucial for managing, monitoring, and predicting water resources as well as using them sustainably. The main objective of this study is to model and evaluate the response of hydrological components to land use/land cover dynamics via hydrological and remote sensing techniques in the Upper Omo-Gibe River Basin, Ethiopia. The sensitive parameters for the model simulation were thoroughly examined and selected. The findings provide significant information on the response of water balance components to LULC change. Between 1997 and 2004, it was observed that the primary factors accelerating the transformation were a rapid increase in agricultural land (46.89 %) and a significant loss of forest cover. Surface runoff (Surf_Q) increased a (4.7 %); increase whereas groundwater recharge (Gw_Q) and lateral flow (Lat_Q) decreased (17.63 %) and (9.54 %), respectively. The model simulation results revealed that surface runoff, evapotranspiration, lateral flow, and groundwater recharge accounted for 22.07 %, 43.95 %, 0.83 %, and 28.88 %, respectively, of the total flow in the present study. The increase in impervious surfaces due to intensified land competition among various sectors contributes to the reduction in the infiltration of water into the ground and accelerates Surf_Q in the catchment. Therefore, local, regional, and national policy interventions are needed to ensure efficient planning for water resource management in the Gibe-III catchment of the Omo-Gibe River Basin.</div></div>","PeriodicalId":56070,"journal":{"name":"Ecohydrology & Hydrobiology","volume":"25 4","pages":"Article 100689"},"PeriodicalIF":2.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145739215","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-01Epub Date: 2025-04-27DOI: 10.1016/j.ecohyd.2025.100662
Mirian Roxana Calderon , Mariana Beatriz Jofré , César Américo Almeida , Juan Manuel Pérez Iglesias , Silvia Patricia González , María Laura Miserendino
Water availability is critical for economic and social development, especially in arid and semi-arid regions. Dams, while beneficial for humans, alter the natural regime of rivers, impacting natural ecosystems. This study used a trait-based approach to determine which attributes allow macroinvertebrates to thrive under the new environmental configuration imposed by flow regulation. To link traits to the impacts of dams, we selected 13 high-gradient streams and compared unregulated and regulated reaches, where we (i) evaluated macroinvertebrate trait responses to hydromorphological characteristics, water chemistry, and habitat shifts and ii) identified the traits associated with stress caused by flow regulation. We classified macroinvertebrates according to 13 traits and 46 modalities. We performed an RLQ analysis, which links environmental features (R) with biological traits (Q) through taxonomic composition (L) followed by a fourth-corner analysis to further confirm trait-environment associations. Body shape, locomotion, feeding habits, respiration, adult ability to fly, flow preference, swimming ability, and adaptations to flow were the traits that most strongly influenced taxa composition. Cylindrical bodies (Oligochaetes), burrowers or clingers, poor swimming abilities, filtering collectors (Simuliidae), non-flying adults, and respiration by pigments (Chironomidae), spiracles (other dipterans), or lung respiration (Mollusca) are some of the traits that enabled organisms to persist at regulated sites. Some environmental features that filtered traits were total width of the channel, discharge, and water chemistry. This investigation provides evidence that trait-based analyses are valuable tools for assessing the ecological health of dam-impacted rivers. Identifying key biological traits will enhance biomonitoring programs and the management of regulated rivers.
{"title":"Influence of river regulation on macroinvertebrate assemblages in a semiarid region: A trait-based approach","authors":"Mirian Roxana Calderon , Mariana Beatriz Jofré , César Américo Almeida , Juan Manuel Pérez Iglesias , Silvia Patricia González , María Laura Miserendino","doi":"10.1016/j.ecohyd.2025.100662","DOIUrl":"10.1016/j.ecohyd.2025.100662","url":null,"abstract":"<div><div>Water availability is critical for economic and social development, especially in arid and semi-arid regions. Dams, while beneficial for humans, alter the natural regime of rivers, impacting natural ecosystems. This study used a trait-based approach to determine which attributes allow macroinvertebrates to thrive under the new environmental configuration imposed by flow regulation. To link traits to the impacts of dams, we selected 13 high-gradient streams and compared unregulated and regulated reaches, where we (i) evaluated macroinvertebrate trait responses to hydromorphological characteristics, water chemistry, and habitat shifts and ii) identified the traits associated with stress caused by flow regulation. We classified macroinvertebrates according to 13 traits and 46 modalities. We performed an RLQ analysis, which links environmental features (R) with biological traits (Q) through taxonomic composition (L) followed by a fourth-corner analysis to further confirm trait-environment associations. Body shape, locomotion, feeding habits, respiration, adult ability to fly, flow preference, swimming ability, and adaptations to flow were the traits that most strongly influenced taxa composition. Cylindrical bodies (Oligochaetes), burrowers or clingers, poor swimming abilities, filtering collectors (Simuliidae), non-flying adults, and respiration by pigments (Chironomidae), spiracles (other dipterans), or lung respiration (Mollusca) are some of the traits that enabled organisms to persist at regulated sites. Some environmental features that filtered traits were total width of the channel, discharge, and water chemistry. This investigation provides evidence that trait-based analyses are valuable tools for assessing the ecological health of dam-impacted rivers. Identifying key biological traits will enhance biomonitoring programs and the management of regulated rivers.</div></div>","PeriodicalId":56070,"journal":{"name":"Ecohydrology & Hydrobiology","volume":"25 4","pages":"Article 100662"},"PeriodicalIF":2.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145738954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-01Epub Date: 2025-04-28DOI: 10.1016/j.ecohyd.2025.100664
Muhammed Sungur Demir, Abdullah Muratoglu
The Water Footprint (WF) concept is essential for assessing freshwater use and guiding sustainable water management. However, existing WF studies often lack sufficient spatial and temporal resolution, leading to inaccuracies in regional water-use assessments. This study enhances WF estimation for the Ceyhan Basin, Türkiye, by integrating the SWAT hydrological model (2011–2020) to improve effective precipitation estimates, capture spatial and temporal WF variations, and address data inconsistencies. Using a refined green WF calculation method, WF analyses were conducted for eight major crops, representing ∼90 % of the basin's cereal-cultivated area.
Results revealed significant spatial variability, with up to fivefold differences in WF for some crops. Cotton exhibited the highest WF (2822 m³/t), while maize accounted for the largest freshwater consumption (289 million m³). Blue WF was most pronounced in the northern basin due to insufficient precipitation, whereas green WF dominated in the south. Temporal trends showed peak WF in May for autumn/winter-sown crops and in July for spring-sown crops. High demand for irrigation, maize, sunflower, cotton, and potatoes during summer underscores the need for sustainable water resource management. These findings highlight the importance of region-specific cropping strategies and optimized irrigation scheduling to enhance water-use efficiency in the Ceyhan Basin.
{"title":"Improving water footprint assessment in agriculture: A high-resolution SWAT model study of the Ceyhan Basin, Türkiye","authors":"Muhammed Sungur Demir, Abdullah Muratoglu","doi":"10.1016/j.ecohyd.2025.100664","DOIUrl":"10.1016/j.ecohyd.2025.100664","url":null,"abstract":"<div><div>The Water Footprint (WF) concept is essential for assessing freshwater use and guiding sustainable water management. However, existing WF studies often lack sufficient spatial and temporal resolution, leading to inaccuracies in regional water-use assessments. This study enhances WF estimation for the Ceyhan Basin, Türkiye, by integrating the SWAT hydrological model (2011–2020) to improve effective precipitation estimates, capture spatial and temporal WF variations, and address data inconsistencies. Using a refined green WF calculation method, WF analyses were conducted for eight major crops, representing ∼90 % of the basin's cereal-cultivated area.</div><div><span>Results revealed significant spatial variability, with up to fivefold differences in WF for some crops. Cotton exhibited the highest WF (2822 m³/t), while maize accounted for the largest freshwater consumption (289 million m³). Blue WF was most pronounced in the northern basin due to insufficient precipitation, whereas green WF dominated in the south. Temporal trends showed peak WF in May for autumn/winter-sown crops and in July for spring-sown crops. High demand for irrigation, maize, sunflower, cotton, and potatoes during summer underscores the need for sustainable </span>water resource management<span>. These findings highlight the importance of region-specific cropping strategies and optimized irrigation scheduling to enhance water-use efficiency in the Ceyhan Basin.</span></div></div>","PeriodicalId":56070,"journal":{"name":"Ecohydrology & Hydrobiology","volume":"25 4","pages":"Article 100664"},"PeriodicalIF":2.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145738951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}