Journal of Hydrology-Regional Studies最新文献_第3页

A framework for assessing groundwater vulnerability and pollution risk in transboundary aquifers: Insights from the Estonian-Latvian transboundary area 评估跨界含水层地下水脆弱性和污染风险的框架：来自爱沙尼亚-拉脱维亚跨界地区的见解

IF 4.7 2区地球科学

Journal of Hydrology-Regional Studies Pub Date : 2025-06-18 DOI: 10.1016/j.ejrh.2025.102525

Magdaleena Männik , Janis Bikše , Enn Karro , Andres Marandi

{"title":"A framework for assessing groundwater vulnerability and pollution risk in transboundary aquifers: Insights from the Estonian-Latvian transboundary area","authors":"Magdaleena Männik , Janis Bikše , Enn Karro , Andres Marandi","doi":"10.1016/j.ejrh.2025.102525","DOIUrl":"10.1016/j.ejrh.2025.102525","url":null,"abstract":"<div><h3>Study region</h3><div>Estonian-Latvian transboundary area</div></div><div><h3>Study focus</h3><div>The primary aim of this study is to develop and apply a harmonized framework for assessing groundwater vulnerability and pollution risk in the Estonian-Latvian transboundary area. The DRASTIC and modified DRASTIC methods were employed to evaluate natural vulnerability, while DRASTIC-L and modified DRASTIC-L methods were used to integrate land use and assess pollution risk. Sensitivity analyses were conducted to identify the influence of key parameters, and results were validated using pollutant infiltration time calculations. This multi-method approach addresses the region's geological complexity and incorporates anthropogenic impacts to provide a comprehensive assessment.</div></div><div><h3>New hydrogeological insights for the region</h3><div>The study reveals significant spatial variability in groundwater vulnerability, influenced by sediment composition, groundwater level, and land use. High-risk areas are predominantly located in regions with sandy sediments, shallow groundwater, and intensive agricultural activity, while zones with deeper groundwater and clay-rich sediments show greater natural protection. By integrating pollution risk mapping with traditional vulnerability assessments, the study highlights the critical role of anthropogenic pressures in shaping contamination risks. The findings underscore the importance of harmonized cross-border data collection and provide a replicable framework for sustainable transboundary groundwater management. These insights contribute to protecting water resources and ensuring the availability of safe drinking water for present and future generations.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"60 ","pages":"Article 102525"},"PeriodicalIF":4.7,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144307661","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

Dynamics of dry-to-wet abrupt alternation events in mainland China from 1961 to 2022: A novel identification method integrating daily soil moisture and precipitation 1961 - 2022年中国大陆干湿突变事件的动态：一种基于日土壤水分和降水的识别方法

IF 4.7 2区地球科学

Journal of Hydrology-Regional Studies Pub Date : 2025-06-18 DOI: 10.1016/j.ejrh.2025.102520

Liaofeng Liang , Jun Xia , Zhonggen Wang

{"title":"Dynamics of dry-to-wet abrupt alternation events in mainland China from 1961 to 2022: A novel identification method integrating daily soil moisture and precipitation","authors":"Liaofeng Liang , Jun Xia , Zhonggen Wang","doi":"10.1016/j.ejrh.2025.102520","DOIUrl":"10.1016/j.ejrh.2025.102520","url":null,"abstract":"<div><h3>Study region</h3><div>This study focuses on mainland China, covering eight subregions.</div></div><div><h3>Study focus</h3><div>Dry-to-wet abrupt alternation (DWAA) events have become increasingly frequent worldwide, causing significant socioeconomic and environmental impacts. Current DWAA research overemphasizes monthly precipitation while neglecting soil moisture integration, which reduces predictive accuracy in agricultural and monsoon regions where DWAA occur within a single month. This study addresses these gaps by developing a novel identification method combining daily soil moisture with precipitation data across mainland China (1961–2022). Using data from 2474 meteorological stations and ERA5 reanalysis, we investigated DWAA characteristics and atmospheric circulation patterns across different subregions.</div></div><div><h3>New hydrological insights for the region</h3><div>Results reveal pronounced regional heterogeneity in DWAA distribution. Northern, Central, and Southern China experienced more frequent events, with Southern China showing the highest station average frequency (24.8 events). Northeastern, Northern China, and Eastern Arid regions displayed higher intensity values, while Southern and Southwestern regions exhibited longer durations. Temporal analysis showed distinct seasonal patterns, with summer DWAA events dominating (35.5 %), significantly exceeding winter (16.7 %) and spring (19.2 %). Atmospheric circulation analysis revealed significant tropospheric reconfigurations characterized by pronounced geopotential height changes at various pressure levels. Water vapor flux analysis identified moisture convergence zones along Southern China and the Yangtze River Basin, exhibiting significant positive anomalies of 0.006–0.012 kg/(m·s), establishing preferential corridors for moisture transport into water-deficient areas.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"60 ","pages":"Article 102520"},"PeriodicalIF":4.7,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144313459","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

Examining the impact of the 2007 Zaca Fire on the long-term hydrological recovery of the Santa Cruz Creek watershed in Southern California 研究2007年扎卡大火对南加州圣克鲁斯河流域长期水文恢复的影响

IF 4.7 2区地球科学

Journal of Hydrology-Regional Studies Pub Date : 2025-06-17 DOI: 10.1016/j.ejrh.2025.102521

Avery Walters , Nawa Raj Pradhan , Ian Floyd , Venkataraman Lakshmi

{"title":"Examining the impact of the 2007 Zaca Fire on the long-term hydrological recovery of the Santa Cruz Creek watershed in Southern California","authors":"Avery Walters , Nawa Raj Pradhan , Ian Floyd , Venkataraman Lakshmi","doi":"10.1016/j.ejrh.2025.102521","DOIUrl":"10.1016/j.ejrh.2025.102521","url":null,"abstract":"<div><h3>Study region</h3><div>This study focuses on the Santa Cruz Creek watershed in Southern California, an area severely impacted by the 2007 Zaca Fire, which started on July 4, 2007, and was contained on September 4, 2007. The region is representative of wildfire-prone Mediterranean-climate catchments.</div></div><div><h3>Study focus</h3><div>We assess long-term post-fire hydrological recovery using a novel dual approach: (1) simulating 16 storm events over a 23-year period (2001–2024) to evaluate pre-fire (2001–2007), post-fire (2007–2012), and recovery (2013–2024) conditions, and (2) directly comparing two similar storm events—one pre-fire (2006) and one during recovery (2017)—to isolate changes in watershed response. Hydrological modeling employed HEC-HMS with the Deficit and Constant Loss Method, the ModClark Transform Model, and the Linear Reservoir Baseflow Model. Remote sensing data, including Enhanced Vegetation Index (EVI) and SERVES Soil Moisture, enhanced modeling and analysis.</div></div><div><h3>New hydrological insights for the region</h3><div>Vegetation cover, soil moisture, and several watershed parameters show substantial recovery after five years. EVI reached 84 % of pre-fire values, while initial soil moisture deficit, time of concentration, and storage coefficient each recovered to roughly 70 %. Fast baseflow exceeded pre-fire levels at 143 %, but slow baseflow declined to 20 %. Groundwater contributions recovered marginally to 52 %. Peak discharge and direct runoff volume declined from post-fire highs of 173 % and 136 % to 125 % and 84 % of pre-fire levels, respectively. Although vegetative conditions stabilize, watershed hydrology remains altered.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"60 ","pages":"Article 102521"},"PeriodicalIF":4.7,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144307658","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

High-resolution spatially interpolated FAO Penman-Monteith crop reference evapotranspiration maps of Sicily Island (Italy) and Jucar River system (Spain) using AgERA5 and ERA5-Land reanalysis datasets 利用AgERA5和ERA5-Land再分析数据集，对意大利西西里岛和西班牙朱卡尔河系统的粮农组织Penman-Monteith作物参考蒸散量图进行了高分辨率空间插值

IF 4.7 2区地球科学

Journal of Hydrology-Regional Studies Pub Date : 2025-06-17 DOI: 10.1016/j.ejrh.2025.102531

Alberto Garcia-Prats , Juan Manuel Carricondo-Antón , Matteo Ippolito , Dario De Caro , Miguel Angel Jiménez-Bello , Juan Manzano-Juárez , Manuel Pulido-Velazquez

{"title":"High-resolution spatially interpolated FAO Penman-Monteith crop reference evapotranspiration maps of Sicily Island (Italy) and Jucar River system (Spain) using AgERA5 and ERA5-Land reanalysis datasets","authors":"Alberto Garcia-Prats , Juan Manuel Carricondo-Antón , Matteo Ippolito , Dario De Caro , Miguel Angel Jiménez-Bello , Juan Manzano-Juárez , Manuel Pulido-Velazquez","doi":"10.1016/j.ejrh.2025.102531","DOIUrl":"10.1016/j.ejrh.2025.102531","url":null,"abstract":"<div><h3>Study region</h3><div>Jucar River System (Spain) and Sicily Island (Italy).</div></div><div><h3>Study focus</h3><div>Penman-Monteith crop reference evapotranspiration (PM-ETo) is critical for irrigation planning and hydrological modeling. Its estimation typically requires dense agricultural weather networks with automated stations. Alternatively, reanalysis datasets like ERA5-Land and AgERA5 offer spatially comprehensive data, but their resolution is often insufficient. Spatial interpolation techniques are thus required to estimate PM-ETo at unsampled locations. This study applied the DRI (Dynamic Regression-Based Interpolation) algorithm to generate high-resolution (100 m) PM-ETo maps for both regions using three data sources: meteorological station records and ERA5-Land and AgERA5 reanalysis products. The performance of AgERA5 for PM-ETo estimation was also assessed. Additionally, PM-ETo interpolated maps from the three sources were compared.</div></div><div><h3>New hydrological insights for the region</h3><div>AgERA5, a bias-corrected downscaling of ERA5, effectively removed bias in Sicily when compared to in situ data, but not in the Jucar system. Nonetheless, AgERA5 outperformed ERA5-Land in both regions for PM-ETo estimation. Following interpolation, the resulting maps retained the same biases identified in the original datasets and preserved the frequency distributions of ground-truth maps. This indicates that the interpolation method does not distort the underlying meteorological fields between stations. The proposed approach offers a valuable tool for practitioners and modelers, enabling the generation of high-resolution, accurate, and practical PM-ETo maps to support irrigation planning and hydrological applications.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"60 ","pages":"Article 102531"},"PeriodicalIF":4.7,"publicationDate":"2025-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144296938","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

Estimation of agricultural flood irrigation water consumption in the Heihe River Basin, China, using satellite based daily land surface evapotranspiration and soil moisture 基于卫星地表日蒸散和土壤水分的黑河流域农业洪涝灌溉耗水量估算

IF 4.7 2区地球科学

Journal of Hydrology-Regional Studies Pub Date : 2025-06-16 DOI: 10.1016/j.ejrh.2025.102524

Lirong Huo , Qiaoyun Xie , Liang Sun , Lisheng Song , Sinuo Tao , Shaomin Liu , Zuo Wang , Yan Li

{"title":"Estimation of agricultural flood irrigation water consumption in the Heihe River Basin, China, using satellite based daily land surface evapotranspiration and soil moisture","authors":"Lirong Huo , Qiaoyun Xie , Liang Sun , Lisheng Song , Sinuo Tao , Shaomin Liu , Zuo Wang , Yan Li","doi":"10.1016/j.ejrh.2025.102524","DOIUrl":"10.1016/j.ejrh.2025.102524","url":null,"abstract":"<div><h3>Study region</h3><div>The Heihe River Basin, China.</div></div><div><h3>Study focus</h3><div>Irrigation data are often from census surveys at coarse administrative or river basin scale, and as such, the amount of water used for agricultural irrigation difficult to quantify. We improve the Soil Moisture to Rain (SM2RAIN) method to estimate irrigation water use in the Heihe River Basin from 2003 to 2020 using thermal infrared and microwave satellite data. The results showed that this approach has satisfactory performance in estimating the annual irrigation water volume (mean volume=0.657 km3/year, R2=0.83, RMSE=0.03 km3/year) when compared with the field measurements at irrigation district administrative scale, due to its reliability in determining the infiltrated water around the root zone used by crops.</div></div><div><h3>New hydrological insights for the region</h3><div>Through an analysis of irrigation water use trends, the results indicate that most farmland areas exhibited a declining trend in water use per hectare (-55 m³/ha/yr). Interestingly, we observed that while water use efficiency improved significantly at the field scale, overall irrigation efficiency showed a decreasing trend. This study reveals a paradox in the Heihe River Basin, where enhanced irrigation efficiency rarely translates into reduced total water consumption at river basin scale. Our study advances agricultural irrigation volume estimation and irrigation mapping across district and river basin scales in arid and semi-arid areas, which should assist in irrigation scheduling and water resource management.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"60 ","pages":"Article 102524"},"PeriodicalIF":4.7,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144296936","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

Quantifying ecosystem-human water trade-offs: A clean water scarcity perspective 量化生态系统-人类水资源权衡：清洁水资源短缺的视角

IF 4.7 2区地球科学

Journal of Hydrology-Regional Studies Pub Date : 2025-06-16 DOI: 10.1016/j.ejrh.2025.102526

Shanlin Tong , Jie Chen , Rui Xia , Wenpan Li , Yan Chen , Chong-Yu Xu

{"title":"Quantifying ecosystem-human water trade-offs: A clean water scarcity perspective","authors":"Shanlin Tong , Jie Chen , Rui Xia , Wenpan Li , Yan Chen , Chong-Yu Xu","doi":"10.1016/j.ejrh.2025.102526","DOIUrl":"10.1016/j.ejrh.2025.102526","url":null,"abstract":"<div><h3>Study region</h3><div>Yangtze River basin.</div></div><div><h3>Study focus</h3><div>Water security is a long-standing concern in developing and developed countries, putting rigorous standards on the reliability of approaches applied to identity and access water scarcity. Previous methods for assessing water scarcity have primarily focused on the quantitative and qualitative needs of human water consumption, underestimating the spatiotemporal fluctuation in water demand of ecosystems and the impacts of ecological water scarcity. Here, we introduce a novel approach to estimate clean water stress index by integrating changes in ecosystem requirement and human demand.</div></div><div><h3>New hydrological insights for the region</h3><div>We calculated clean water stress index (CWSI) and distinguished different types of water scarcity in the Yangtze River basin. Results indicate an upward tendency in CWSI from 2010 to 2020, with severe deficiencies occurred in upstream regions. Nearly 9.52 % of grid cells were threatened by ecology-based water scarcity. The increase in environmental flow requirement exacerbated clean water scarcity, which was unevenly distributed across temporal and spatial dimensions. The weighted Theil’s index increased from 0.283 in 2010–0.417 in 2020. Scenario simulations show that the variations of clean water stress index were predominantly driven by natural factor, while human activity assumed a secondary role. Our proposed approach provides a novel perspective for elucidating the impacts of ecosystem and human on water security.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"60 ","pages":"Article 102526"},"PeriodicalIF":4.7,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144291569","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

Cascading floods in multi-level levee protection areas: Case studies of Dongting lake bursting 多层堤防保护区的级联洪水——以洞庭湖决口为例

IF 4.7 2区地球科学

Journal of Hydrology-Regional Studies Pub Date : 2025-06-16 DOI: 10.1016/j.ejrh.2025.102495

W.J. Lu , R.C. Jiang , J.H. Li , L.M. Zhang , J. He , M. Peng , X. Li

{"title":"Cascading floods in multi-level levee protection areas: Case studies of Dongting lake bursting","authors":"W.J. Lu , R.C. Jiang , J.H. Li , L.M. Zhang , J. He , M. Peng , X. Li","doi":"10.1016/j.ejrh.2025.102495","DOIUrl":"10.1016/j.ejrh.2025.102495","url":null,"abstract":"<div><h3>Study region</h3><div>Dongting Lake reservoir, the middle reach of Yangtze River, China.</div></div><div><h3>Study focus</h3><div>This paper aims to develop an efficient numerical approach to simulate the entire process of cascading failure in multi-level levees, coupling the multi-level breaches with the multi-level flooding. Two notable cases in 1996 and 2024 in the study region are taken as case studies to reveal the hazard amplification effects from cascading levee failure, quantify the buffering effect of multi-level levees, and assess the effectiveness of the mitigation measures during emergency rescue.</div></div><div><h3>New hydrological insights for the region</h3><div>Comparing with the single levee breach in 2024, the primary reason for the 2-level cascading levee failure in 1996 was the continuous rise in water level in Dongting Lake after breach #1, which accelerated the breach expansion and hastened the flood routing process. The second-level levee failure triggers subsequent erosion and expansion of breach #1, resulting in a 2-times increase in the breach length and a stronger destructive power of the second-level flood. Considering the mitigation measures based on four scenarios, the prompt sealing of breach #1 effectively decreases the length of breach #2 by 2/3 and lowers the maximum inundation rate by 1/3. The timely reinforcement of the second-level levee can prevent or delay the cascading failure of multi-level levees, providing window periods for emergency rescue.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"60 ","pages":"Article 102495"},"PeriodicalIF":4.7,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144291480","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

Scheduling strategies of cascade reservoirs under extreme drought conditions during the impoundment period: A case study of lower Jinsha River, China 极端干旱条件下梯级水库蓄水期调度策略——以金沙江下游为例

IF 4.7 2区地球科学

Journal of Hydrology-Regional Studies Pub Date : 2025-06-16 DOI: 10.1016/j.ejrh.2025.102533

Rongqi Zhang , Wei Miao , Shanghong Zhang, Yinxin Ge

{"title":"Scheduling strategies of cascade reservoirs under extreme drought conditions during the impoundment period: A case study of lower Jinsha River, China","authors":"Rongqi Zhang , Wei Miao , Shanghong Zhang, Yinxin Ge","doi":"10.1016/j.ejrh.2025.102533","DOIUrl":"10.1016/j.ejrh.2025.102533","url":null,"abstract":"<div><h3>Study Region</h3><div>Cascade reservoir system, lower Jinsha River Basin, China.</div></div><div><h3>Study Focus</h3><div>Influenced by global warming, the Jinsha River Basin experiences frequent extreme droughts. Notably, the most severe drought since 1961 occurred July-August 2022, causing critical storage deficits. To address severe drought impacts on cascade storage and power supply, a multi-objective optimal operation model was developed. It aims to maximize both impoundment efficiency (IE) at the end of impoundment period (IP) and total power generation benefits across impoundment, high water level operation, and drawdown periods. Energy storage (ES) at the end of IP served as an intermediate variable enabling coordinated multi-stage optimization, mitigating risks of compromising long-term benefits from single-stage optimization. Under the optimal operation scheme for the 2022 impoundment period, an impoundment efficiency (IE) of 0.784 was achieved, and total power generation over the three periods reached 133.809 billion kWh, including 11.169 billion kWh during impoundment. The trade-off between IE and generation benefit loss was quantified.</div></div><div><h3>New Hydrological Insights for the Region</h3><div>Analyzing the 2022 extreme drought scenario, the optimal reservoir filling sequence was determined as Wudongde-Baihetan-Xiluodu-Xiangjiaba. Reducing IE to maximize contemporary generation increases short-term output but compromises overall benefits across the full cycle. Thus, prioritizing higher IE is crucial for safeguarding total generation benefits. Optimized electricity pricing may partially offset benefit losses under extreme conditions.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"60 ","pages":"Article 102533"},"PeriodicalIF":4.7,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144291481","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

Multi-scale accuracy assessment of meteorological satellite precipitation products in the dry-hot valley of Jinsha River 金沙江干热河谷气象卫星降水产品的多尺度精度评价

IF 4.7 2区地球科学

Journal of Hydrology-Regional Studies Pub Date : 2025-06-16 DOI: 10.1016/j.ejrh.2025.102535

Junxin Feng , Guokun Chen , Xingwu Duan , Bohui Tang , Zicheng Liu , Yan Huang , Yuzhuang Deng

{"title":"Multi-scale accuracy assessment of meteorological satellite precipitation products in the dry-hot valley of Jinsha River","authors":"Junxin Feng , Guokun Chen , Xingwu Duan , Bohui Tang , Zicheng Liu , Yan Huang , Yuzhuang Deng","doi":"10.1016/j.ejrh.2025.102535","DOIUrl":"10.1016/j.ejrh.2025.102535","url":null,"abstract":"<div><h3>Study region</h3><div>The dry-hot valley of Jinsha River.</div></div><div><h3>Study focus</h3><div>This study focuses on the dry-hot valley of Jinsha River, using the daily precipitation observation data of two decades as a reference. To evaluate the spatial and temporal performance of five satellite and reanalysis precipitation products (IMERG, TRMM 3B42, PERSIANN-CDR, CHIRPS, and ERA5), seven statistical and three classification indicators were used. Voronoi partitioning and K-Means clustering were employed to enhance the analysis.</div></div><div><h3>New hydrological insights for the region</h3><div>The findings reveal: (1) On an annual scale, IMERG showed the best long-term performance, while caution was needed when using PERSIANN-CDR and ERA5. (2) The dry season was the most reliable period for precipitation estimates, with low false alarm rates and high hit rates. However, heavy rainfall events tended to be overestimated. (3) Monthly accuracy was more stable from November to April, while it decreased and became more variable from May to October. IMERG successfully captured the spatial and temporal distribution of monthly precipitation, while ERA5 showed strong fluctuations and significant overestimation. Additionally, precipitation products performed better in the 1200–1600 m elevation range, with IMERG and TRMM 3B42 excelling across all elevations, while PERSIANN-CDR and ERA5 performed poorly. (4) The IMERG product demonstrated strong agreement with observed daily precipitation during the rainy season, whereas ERA5 and CHIRPS exhibited significant overestimation. Overall, IMERG demonstrated excellent adaptability, providing valuable soil erosion precipitation data for the dry-hot valley.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"60 ","pages":"Article 102535"},"PeriodicalIF":4.7,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144296937","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

Framework for extracting multi-objective operation rules for cascade reservoirs based on causal features and physical mechanisms 基于因果特征和物理机制的梯级水库多目标运行规则提取框架

IF 4.7 2区地球科学

Journal of Hydrology-Regional Studies Pub Date : 2025-06-14 DOI: 10.1016/j.ejrh.2025.102522

Donglin Gu , Baowei Yan , Jianbo Chang , Yixuan Zou , Dongxu Yang , Mingbo Sun , Xiaoyu Diao

{"title":"Framework for extracting multi-objective operation rules for cascade reservoirs based on causal features and physical mechanisms","authors":"Donglin Gu , Baowei Yan , Jianbo Chang , Yixuan Zou , Dongxu Yang , Mingbo Sun , Xiaoyu Diao","doi":"10.1016/j.ejrh.2025.102522","DOIUrl":"10.1016/j.ejrh.2025.102522","url":null,"abstract":"<div><h3>Study region</h3><div>The cascade reservoirs in the middle and lower Yalong River, China</div></div><div><h3>Study Focus</h3><div>Coordinated optimal operation of cascade reservoirs can improve hydropower benefits. Deep learning models can extract reservoir operation rules by mapping known conditions to outflow discharge decisions. However, the “black-box” nature of these models and challenges associated with high-dimensional inputs impede simulation of reservoir operations. To overcome these issues, this study proposes a rule extraction framework. Based on this framework, a Bidirectional Long Short-Term Memory network enhanced with Multi-Head Self-Attention Mechanism and Bayesian Optimization (BO-MHSAM-BiLSTM) is developed for extracting operation rules. To reduce high dimensionality, Convergent Cross Mapping (CCM) quantifies causal relationships between features and decision variables. Moreover, embedding physical constraints into the model’s loss function further enhances interpretability.</div></div><div><h3>New hydrological insights for the region</h3><div>Applied to three reservoirs in the middle and lower Yalong River, the framework achieved Nash-Sutcliffe Efficiency (NSE) values of 0.81, 0.95, and 0.96 and Water Balance Index (WBI) values of 1.00, 1.00, and 0.99. By applying the simulated operation rules with relevant constraints to the cascade reservoir system operation model, the annual average power generation of the cascade reservoirs increased by 3.39 billion kWh compared to design values. Moreover, CCM-based feature screening improved simulation accuracy, and physical constraints strengthened rule practicality. These findings demonstrate strong applicability and offer valuable guidance for cascade reservoir operation rule extraction.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"60 ","pages":"Article 102522"},"PeriodicalIF":4.7,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144280131","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}

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