Journal of Hydrology-Regional Studies最新文献_第8页

A two-stage game-based model for distribution of water consumption control indicators

IF 4.7 2区地球科学

Journal of Hydrology-Regional Studies Pub Date : 2025-02-28 DOI: 10.1016/j.ejrh.2025.102259

Wenrui Wang , Ting Wang , Bin Liu , Jinxia Sha , Jinjun You

{"title":"A two-stage game-based model for distribution of water consumption control indicators","authors":"Wenrui Wang , Ting Wang , Bin Liu , Jinxia Sha , Jinjun You","doi":"10.1016/j.ejrh.2025.102259","DOIUrl":"10.1016/j.ejrh.2025.102259","url":null,"abstract":"<div><h3>Study region</h3><div>Handan, China.</div></div><div><h3>Study focus</h3><div>Water consumption control indicators (WCCI) are key metrics used by China’s water authorities to regulate regional water use, promote conservation, and plan resource utilization. This study integrates an improved bankruptcy game model with a fuzzy cooperative game model to propose a two-stage decomposition method.</div></div><div><h3>New hydrological insights</h3><div>In the first stage, the bankruptcy game model divides WCCI into rigid and non-rigid indicators, ensuring rigid water demand is met while considering regional resources and socio-economic factors. In the second stage, the fuzzy cooperative game model optimizes non-rigid indicator distribution by forming water resource cooperation alliances, enhancing overall benefits. A case study in Handan, Hebei Province, China, was conducted using the “city-county” administrative division approach. WCCI decomposition was analyzed under two water availability scenarios in 2030: normal years (P = 50 %) and dry years (P = 75 %). Results show that under the bankruptcy game model, water demand satisfaction reaches 100 % in normal years and 80 %-98 % in dry years. Under the fuzzy cooperative game model, overall benefits increase by 12.9 % in normal years and 12.7 % in dry years, with water demand satisfaction ranging from 94 % to 109 % in normal years and 84 %-107 % in dry years. This method offers a new perspective on optimal water resource allocation, improving efficiency and fairness.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"58 ","pages":"Article 102259"},"PeriodicalIF":4.7,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143519120","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Water use strategies and water conservation in Picea schrenkiana forests in the Kashi River Basin, China

IF 4.7 2区地球科学

Journal of Hydrology-Regional Studies Pub Date : 2025-02-28 DOI: 10.1016/j.ejrh.2025.102237

Yinxia Li, Yuhui Yang, Mao Ye, Ying Li, Bin Zou

{"title":"Water use strategies and water conservation in Picea schrenkiana forests in the Kashi River Basin, China","authors":"Yinxia Li, Yuhui Yang, Mao Ye, Ying Li, Bin Zou","doi":"10.1016/j.ejrh.2025.102237","DOIUrl":"10.1016/j.ejrh.2025.102237","url":null,"abstract":"<div><h3>Study region</h3><div>The Kashi River Basin is located in northwestern Xinjiang, China.</div></div><div><h3>Study focus</h3><div>Using stable isotope techniques and incorporating the MixSIAR model, we studied the main water sources of Picea schrenkiana during the growing season. We estimated the evaporation loss of soil and river water using the Craig-Gordon and Rayleigh Fractionation models, respectively, to compare their evaporation loss and explore the reasons for these differences.</div></div><div><h3>New hydrological insights</h3><div>The results showed that (1) in spring 2024, Picea schrenkiana mainly utilized 0–60 cm of soil water; the utilization rate of each layer was 20.5 %, 21.0 %, and 20.6 %, respectively; in summer 2024, 0–40 cm of soil water was utilized, with the utilization rate of each layer reaching 25.1 % and 21.1 %, respectively; and in autumn 2024, 0–20 cm of soil water was utilized and the rate rose to 29.6 %. (2) The evaporation loss of soil water was lower than that of river water during the same period. In the summer of 2024, the evaporation loss of river water was 60 %, while the evaporation loss of soil water from 0–20 cm was the largest, only 36.6 %, reflecting the function of Picea schrenkiana forests to contain water. This study provides a reference for vegetation protection and management in the region as well as its ecological benefits.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"58 ","pages":"Article 102237"},"PeriodicalIF":4.7,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143519121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Compound temporal-spatial extreme precipitation events in the Poyang Lake Basin of China

IF 4.7 2区地球科学

Journal of Hydrology-Regional Studies Pub Date : 2025-02-28 DOI: 10.1016/j.ejrh.2025.102270

Chao Deng , Yinchi Zhang , Miaomiao Ma , Ying Chen , Jianhui Wei , Harald Kunstmann , Lu Gao

{"title":"Compound temporal-spatial extreme precipitation events in the Poyang Lake Basin of China","authors":"Chao Deng , Yinchi Zhang , Miaomiao Ma , Ying Chen , Jianhui Wei , Harald Kunstmann , Lu Gao","doi":"10.1016/j.ejrh.2025.102270","DOIUrl":"10.1016/j.ejrh.2025.102270","url":null,"abstract":"<div><h3>Study region</h3><div>The study region is the Poyang Lake Basin (PLB). As a typical humid subtropical basin in China, the PLB is crisscrossed by rivers and lakes, where frequent hydrological and meteorological processes occur.</div></div><div><h3>Study focus</h3><div>This study identified temporal extreme precipitation, spatial extreme precipitation, and compound temporal-spatial extreme precipitation events to investigate precipitation extremes. The differences in occurrence of compound widespread-persistent extreme precipitation (WPEP), persistent extreme precipitation (PEP) and widespread extreme precipitation (WEP) events were investigated using the Weather Research and Forecast (WRF) model.</div></div><div><h3>New hydrological insights for the region</h3><div>Extreme precipitation events characterized by high intensity and long duration were more likely to occur in the northern part of the PLB. The frequency of extreme precipitation showed an increasing trend in the central and northeastern regions of the PLB. The contribution of PEP increased from an average of 30.7 % during the period 1983–1992 to 37.2 % during 2013–2022. The WPEP event exhibited a prolonged duration, greater precipitation intensity, and higher precipitable water (PW) and water vapor mixing ratio at 2 m (Q2). Significant changes in PW and Q2 were observed prior to the occurrence of the PEP event. However, PW and Q2 values remained stable during WEP and WPEP events. The PLB was influenced by two water vapor sources, from the north and southwest during the WEP and WPEP events.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"58 ","pages":"Article 102270"},"PeriodicalIF":4.7,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143511457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

A novel hybrid machine learning framework for spatio-temporal analysis of reference evapotranspiration in India

IF 4.7 2区地球科学

Journal of Hydrology-Regional Studies Pub Date : 2025-02-27 DOI: 10.1016/j.ejrh.2025.102271

Dolon Banerjee , Sayantan Ganguly , Wen-Ping Tsai

{"title":"A novel hybrid machine learning framework for spatio-temporal analysis of reference evapotranspiration in India","authors":"Dolon Banerjee , Sayantan Ganguly , Wen-Ping Tsai","doi":"10.1016/j.ejrh.2025.102271","DOIUrl":"10.1016/j.ejrh.2025.102271","url":null,"abstract":"<div><h3>Study region</h3><div>The study focuses on the diverse climatic regions of India, spanning arid, semi-arid, sub-humid, and humid zones.</div></div><div><h3>Study focus</h3><div>This research employs a novel hybrid machine learning (ML) framework for precise spatio-temporal reference evapotranspiration (ET<sub>o</sub>) modelling from 1970 to 2024, addressing the variability in temperature, humidity, and precipitation. Three advanced ML models—Quantile-Adjusted xLSTM Network (QAxLNet), Quantile-Score Diffusion Model (QSDM), and Attentive Deep Quantile-Aware Autoencoder Network (ADAQNet)—are proposed and applied, focusing on relative humidity and temperature as critical predictors. Model validation, conducted with EEFlux-derived ET<sub>o</sub> data and Indian Meteorological Department (IMD) benchmarks, revealed strong alignment across diverse climatic zones.</div></div><div><h3>New hydrological insights for the region</h3><div>The MPI-ESM1–2-HR model under SSP3–7.0 scenarios outperformed other CMIP6 models, with a correlation coefficient of 0.975 and spatial error of 3.55 mm. The ADAQNet demonstrated superior performance, with lowest errors RMSE (Train: 0.2247, Test: 0.2499), and R<sup>2</sup> (Train: 0.96; Test: 0.9571) among the models. ET<sub>o</sub> declined at an average rate of 1.9 mm/year, indicating the role of climate change. ET<sub>o</sub> variability closely mirrored the spatial distribution of the National Building Code (NBC) of India. Seasonal variations were significant, with arid regions (Rajasthan, Gujarat) experiencing the highest increase (2.5–5.1 mm/year). Humid regions showed high sensitivity to RH forecasts, with up to 20 % ET<sub>o</sub> deviation. The study emphasizes the spatial, temporal, and seasonal variations of ET<sub>o</sub> across the region, highlighting its dependence on climatic factors.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"58 ","pages":"Article 102271"},"PeriodicalIF":4.7,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143509822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

A technical framework for determining water consumption thresholds in the semi-arid Xiliao River Plain based on terrestrial water balance

IF 4.7 2区地球科学

Journal of Hydrology-Regional Studies Pub Date : 2025-02-26 DOI: 10.1016/j.ejrh.2025.102261

Xuanxuan Wang , Huan Liu , Yangwen Jia , Jianhua Wang , Xuewu Wei , Yuhua Wang , Xiaola Wang , Yefei Ji , Lei Dang , Peng Hu

{"title":"A technical framework for determining water consumption thresholds in the semi-arid Xiliao River Plain based on terrestrial water balance","authors":"Xuanxuan Wang , Huan Liu , Yangwen Jia , Jianhua Wang , Xuewu Wei , Yuhua Wang , Xiaola Wang , Yefei Ji , Lei Dang , Peng Hu","doi":"10.1016/j.ejrh.2025.102261","DOIUrl":"10.1016/j.ejrh.2025.102261","url":null,"abstract":"<div><h3>Study regions</h3><div>The Xiliao River Plain.</div></div><div><h3>Study focus</h3><div>This study proposed a technical framework for determining water consumption thresholds in semi-arid regions based on terrestrial water balance. The technical framework includes three parts: adaptability evaluation and selection of remote sensing products, calculation of agricultural and ecological water consumption, and determination of water consumption thresholds.</div></div><div><h3>New hydrological insights for the region</h3><div>This framework could separate agricultural and ecological water consumption, and effectively determining the water consumption thresholds. During the period of 1980–2022, agricultural water consumption increased significantly (<em>p</em> < 0.01) at the rate of 0.67 × 10<sup>8</sup> m<sup>3</sup>/year, but ecological water consumption decreased significantly (<em>p</em> < 0.05) at the rate of 0.20 × 10<sup>8</sup> m<sup>3</sup>/year. According to the type of major water-consuming sectors, the Xiliao River Plain was categorized into three types of regions: regions where agricultural water consumption accounted for the majority (AR), regions where ecological water consumption accounted for the majority (ER), and regions where agricultural and ecological water consumption together accounted for the majority (AER). For all three types of regions, a significant positive linear correlation between precipitation surplus coefficient and terrestrial water storage change was detected. To maintain terrestrial water balance, the proportion of total evapotranspiration consumption to precipitation should be limited to 76.3∼93.5 %. For AR, ER and AER, the proportion of major water-consuming sectors in precipitation should be controlled at 47.3∼63.1 %, 49.9∼62.7 % and 61.8∼80.0 %, respectively.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"58 ","pages":"Article 102261"},"PeriodicalIF":4.7,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143487722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Widespread pH increase and geochemical trends in fifty boreal lakes: Evidence, prediction and plausible attribution to climate and permafrost thaw impacts across northeastern Alberta

IF 4.7 2区地球科学

Journal of Hydrology-Regional Studies Pub Date : 2025-02-26 DOI: 10.1016/j.ejrh.2025.102253

J.J. Gibson , A. Jaggi , F.J. Castrillon-Munoz

{"title":"Widespread pH increase and geochemical trends in fifty boreal lakes: Evidence, prediction and plausible attribution to climate and permafrost thaw impacts across northeastern Alberta","authors":"J.J. Gibson , A. Jaggi , F.J. Castrillon-Munoz","doi":"10.1016/j.ejrh.2025.102253","DOIUrl":"10.1016/j.ejrh.2025.102253","url":null,"abstract":"<div><h3>Study region</h3><div>This study focuses on 50 boreal lakes and catchments situated in northeastern Alberta, Canada between 55.68°N – 59.72°N and 110.02°W – 115.46°W.</div></div><div><h3>Study focus</h3><div>Evidence for trends in chemical composition of lakes, including pH increases are provided using Mann-Kendall statistics, geochemical modelling, δ<sup>18</sup>O, δ<sup>2</sup>H, and δ<sup>13</sup>C, which are compared to trend statistics for climate, water balance, and groundwater indicators.</div></div><div><h3>New hydrological insights for the region</h3><div>Groundwater contributions are generally found to be increasing with water yield and carbon inputs as sites advance along the thaw trajectory. The exception to this is shield lakes which continue to be surface water dominant. Statistical analyses suggest widespread trends, both significant and non-significant, in geochemical parameters across the lake network including pH increases in 46 of 50 lakes. In shale-dominated plateau areas, pH trends are adequately described by changes in HCO<sub>3</sub><sup>-</sup>, attributed mainly to carbon input associated with permafrost thaw. For these lakes, prediction improves little if other variables are considered, whereas for post thaw areas, prediction of pH trends improves if water yield trends are also considered. In sub-regions with appreciable carbonate, pH trend prediction improves significantly if values of δ<sup>13</sup>C<sub>DIC</sub> and Dissolved Inorganic Carbon (DIC) are also considered. We postulate that recent pH trends across the region may only be temporary and that lake acidification may yet occur once permafrost thaw and related carbon imports diminish.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"58 ","pages":"Article 102253"},"PeriodicalIF":4.7,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143488065","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Drought evolution and driving mechanisms in the China-Pakistan economic corridor under a changing environment

IF 4.7 2区地球科学

Journal of Hydrology-Regional Studies Pub Date : 2025-02-26 DOI: 10.1016/j.ejrh.2025.102263

Anni Deng , Wenxin Xie , Xinyi Chen , Hui Ran , Qiao Li , Ping'an Jiang , Tehseen Javed , Qiang Yu , Hao Feng , Ning Yao , Mengyuan Xu

{"title":"Drought evolution and driving mechanisms in the China-Pakistan economic corridor under a changing environment","authors":"Anni Deng , Wenxin Xie , Xinyi Chen , Hui Ran , Qiao Li , Ping'an Jiang , Tehseen Javed , Qiang Yu , Hao Feng , Ning Yao , Mengyuan Xu","doi":"10.1016/j.ejrh.2025.102263","DOIUrl":"10.1016/j.ejrh.2025.102263","url":null,"abstract":"<div><h3>Study region</h3><div>The China-Pakistan Economic Corridor (CPEC) is a critical hub of the \"Belt and Road\" initiative, making it particularly vulnerable to drought effects driven by climate change and human activities.</div></div><div><h3>Study focus</h3><div>This study evaluates the Standardized Precipitation Evapotranspiration Index (SPEI) and the Soil Moisture Deficit Index (SMDI) at 0–10 cm and 10–40 cm depths using monthly grid data for meteorological and soil moisture from 1981 to 2021. The Run Theory, principal component analysis, and other methodologies were employed to analyze drought evolution and its driving factors.</div></div><div><h3>New hydrological insights for the region</h3><div>The longer the timescale, the stronger the correlation between SPEI and SMDI. \"Dryness-dryness,\" indicating prolonged low moisture, and \"dryness-wetness,\" marking transitions to wetter conditions, were recorded during 1998–2003 and 2016–2021, respectively. Spatial trend analysis revealed significant declines in SPEI during summer and winter, while SMDI showed an upward trend in the northeast and southwest regions of CPEC. As indicated by the SPEI, SMDI<sub>0–10</sub>, and SMDI<sub>10–40</sub>, extreme drought events occurred with respective counts of 10, 8, and 6. These significant drought events primarily affected Sindh, Punjab, and Gilgit-Baltistan. The study identifies strong correlations (<em>r</em> > 0.7) between drought indices and climate factors, with atmosphere status exerting the more significant impact on drought in CPEC. These insights are invaluable for formulating effective drought monitoring and early warning systems within the CPEC region.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"58 ","pages":"Article 102263"},"PeriodicalIF":4.7,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143509821","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Analysis of water supply and usage cooperation strategies and evolutionary game among multiple stakeholders in water network

IF 4.7 2区地球科学

Journal of Hydrology-Regional Studies Pub Date : 2025-02-25 DOI: 10.1016/j.ejrh.2025.102258

Junyan Gao , Liang Zheng , Shuangtong Li , Xiangtian Nie , Kexin Huang

{"title":"Analysis of water supply and usage cooperation strategies and evolutionary game among multiple stakeholders in water network","authors":"Junyan Gao , Liang Zheng , Shuangtong Li , Xiangtian Nie , Kexin Huang","doi":"10.1016/j.ejrh.2025.102258","DOIUrl":"10.1016/j.ejrh.2025.102258","url":null,"abstract":"<div><h3>Study region</h3><div>Cooperation in water supply and usage under the national water network construction framework in China.</div></div><div><h3>Study focus</h3><div>The development of water network projects can significantly alleviate water resource scarcity while enhancing the regional carrying capacity of water resources. The effectiveness and efficiency of water supply through these networks depend on the cooperation of multiple stakeholders, including water source transferring areas, receiving areas, and the operation of the water network infrastructure itself. This study integrates China’s current practices in water network construction and operation, identifies three typical water supply modes, and analyzes the behavioral strategies of stakeholders. Evolutionary game models are developed to explore the stable evolutionary pathways for cooperation in water supply and usage.</div></div><div><h3>New hydrological insights for the region</h3><div>The water usage strategies of water receiving areas significantly influence the stable evolution strategies of tripartite game system. Both supply-side competition and demand-side competition can ultimately evolve into water price competition. The business strategies of enterprises are highly uncertain, and when they possess strong bargaining power, there is a high probability of water supply price increases. Therefore, price regulation measures are essential to safeguard social welfare. To prevent the demand side from falling into price competition, it is recommended that mutual water usage negotiation mechanisms be established between water receiving areas, with higher-level government departments intervening in the macro-allocation of water resources. These insights provide valuable guidance for coordinating regional water demand, alleviating supply-demand contradictions, and reforming regional integrated water pricing.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"58 ","pages":"Article 102258"},"PeriodicalIF":4.7,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143487856","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

The ground ice melting has accelerated the lake expansion in the hinterland of the permafrost region on the Qinghai-Tibet Plateau

IF 4.7 2区地球科学

Journal of Hydrology-Regional Studies Pub Date : 2025-02-25 DOI: 10.1016/j.ejrh.2025.102268

Shibo Liu , Huayun Zhou , Lin Zhao , Lingxiao Wang , Defu Zou , Guojie Hu , Yuxin Zhang , Zhe Sun , Zhibin Li , Yongping Qiao

{"title":"The ground ice melting has accelerated the lake expansion in the hinterland of the permafrost region on the Qinghai-Tibet Plateau","authors":"Shibo Liu , Huayun Zhou , Lin Zhao , Lingxiao Wang , Defu Zou , Guojie Hu , Yuxin Zhang , Zhe Sun , Zhibin Li , Yongping Qiao","doi":"10.1016/j.ejrh.2025.102268","DOIUrl":"10.1016/j.ejrh.2025.102268","url":null,"abstract":"<div><h3>Study region</h3><div>The Zonag Lake-Yanhu Lake basin on the Qinghai-Tibet Plateau (QTP).</div></div><div><h3>Study focus</h3><div>The melting of ground ice near the permafrost table is an important factor leading to the lake expansion on the QTP. We quantitatively assessed the contribution of change in ground ice to lake expansion in the Zonag Lake-Yanhu Lake basin using interferometric synthetic aperture radar monitoring.</div></div><div><h3>New hydrological insights for the region</h3><div>Two migration modes of meltwater from ground ice near the permafrost table were identified: one flows directly into the lake, while the other replenishes the active layer. From 2018–2021, the meltwater source of ground ice melting to the hydrological cycle was estimated at 0.04 ± 0.002 Gt/a, accelerating lake expansion (the rate of increase in lake water storage) by 9.8 %. Our findings also indicate that ground ice meltwater increases the soil moisture content of the active layer, with an estimated increase in equivalent liquid water thickness of approximately 0.002 Gt/a. This suggests that previous assessments of water released from ground ice melting, based on ground surface subsidence, may underestimated actual amounts by around 5 % in the permafrost regions. These findings emphasized that the hinterland permafrost region was also experiencing rapid degradation, and the melting of ground ice was accelerating lake expansion, providing valuable insights into the impacts of permafrost changes on the regional water cycle.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"58 ","pages":"Article 102268"},"PeriodicalIF":4.7,"publicationDate":"2025-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143480517","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

How have the drawdown zones of large reservoirs changed over the past two decades in China?

IF 4.7 2区地球科学

Journal of Hydrology-Regional Studies Pub Date : 2025-02-22 DOI: 10.1016/j.ejrh.2025.102260

Jiamin Qin , Shengjun Wu , Zhaofei Wen

{"title":"How have the drawdown zones of large reservoirs changed over the past two decades in China?","authors":"Jiamin Qin , Shengjun Wu , Zhaofei Wen","doi":"10.1016/j.ejrh.2025.102260","DOIUrl":"10.1016/j.ejrh.2025.102260","url":null,"abstract":"<div><h3>Study region</h3><div>This study focuses on the Reservoir Drawdown Zones (RDZs) of 727 large reservoirs in China.</div></div><div><h3>Study focus</h3><div>The research investigates the spatiotemporal dynamics of RDZs from 2000 to 2021, utilizing remote sensing data from the Global Surface Water Dataset (GSWD). It examines trends in RDZ area changes, their spatial distribution across major river basins, and the key drivers, including reservoir operations, climate variability, and human activity.</div></div><div><h3>New hydrological insights for the region</h3><div>According to the findings, RDZ zones constitute around 35 % of a major reservoir's maximum water surface area. Although there are significant fluctuations over time, the total area of RDZs shows an increasing trend on a temporal scale. Prior to 2015, there were some variations in the growth of RDZ areas, which were likely caused by external factors such as operating plans, early reservoir commissioning, and climate change. The capacity of reservoir operations to adjust to climate change was enhanced after 2015 due to the construction and operation of additional large reservoirs, as well as improvements in scheduling and management. As a result, RDZ regions continued to expand at a rate significantly faster than before 2015. Geographically, RDZs are primarily distributed in eastern, central, and southern China, particularly in the Songhua and Liaohe River Basins, the Yangtze River Basin, and the Pearl River Basin. From a spatial perspective, local population density, economic growth, and water resource management techniques, in addition to geographic and climatic factors, may influence the distribution patterns of RDZs across reservoirs of varying sizes. In RDZ regions, more than one-fourth of the reservoirs exhibit notable interannual changes, where climate or human activity may be the primary driving factor. This challenges the conventional wisdom that RDZ regions typically exhibit consistent interannual patterns.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"58 ","pages":"Article 102260"},"PeriodicalIF":4.7,"publicationDate":"2025-02-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143464033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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