Journal of Hydrology-Regional Studies最新文献_第10页

Impact of wildfires on spatial and temporal evolution of groundwater recharge in an Atlantic pine forest: An integrated approach using field, remote sensing and modeling. 森林大火对大西洋松林地下水补给时空演变的影响：基于野外、遥感和模拟的综合方法

IF 4.7 2区地球科学

Journal of Hydrology-Regional Studies Pub Date : 2025-04-21 DOI: 10.1016/j.ejrh.2025.102408

Mariana La Pasta Cordeiro , João Pedro Nunes , Maria Teresa Condesso de Melo

{"title":"Impact of wildfires on spatial and temporal evolution of groundwater recharge in an Atlantic pine forest: An integrated approach using field, remote sensing and modeling.","authors":"Mariana La Pasta Cordeiro , João Pedro Nunes , Maria Teresa Condesso de Melo","doi":"10.1016/j.ejrh.2025.102408","DOIUrl":"10.1016/j.ejrh.2025.102408","url":null,"abstract":"<div><h3>Study region</h3><div>Leiria Pine Forest (Portugal)</div></div><div><h3>Study focus</h3><div>Climate change, including higher temperatures, drier atmosphere and prolonged droughts, is increasing the risk, extent and impacts of wildfires in Southern Europe. This study investigates extreme wildfires impacts on groundwater recharge in the Leiria Pine Forest, integrating field and remote sensing data with modelling tools to simulate recharge in burnt and unburnt areas from 2001 to 2023.</div></div><div><h3>New hydrological insights for the region:Results</h3><div>show a decline in crop-adjusted potential evapotranspiration due to vegetation loss after the fire, resulting in increased recharge rates. Groundwater recharge increased from 20 % of annual precipitation pre-fire to over 40 % in the first-year post-fire in the burnt area, gradually stabilizing at around 30 % by 2023. This contrasts with the unburnt area, where recharge rates remained stable. This increase is influenced by geological and pedological characteristics, favorable topography which promotes low runoff and high infiltration rates, and specific climatic conditions. The low water-holding capacity of the sandy arenosols in the burnt area, promotes faster infiltration, increasing recharge. Contrary to other studies, soil water repellence seems to have limited influence in this area due to local climate and soil conditions. Predicting the consequences of wildfires in groundwater is complex process, nevertheless the application of multiple methodologies increases result reliability.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"59 ","pages":"Article 102408"},"PeriodicalIF":4.7,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143851423","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

Structural sediment connectivity dynamics in a representative watershed of the southern China’s red soil region: Response to land use/cover changes 中国南方红壤区代表性流域结构泥沙连通性动态：对土地利用/覆被变化的响应

IF 4.7 2区地球科学

Journal of Hydrology-Regional Studies Pub Date : 2025-04-21 DOI: 10.1016/j.ejrh.2025.102407

He Wang , Songyang Li , Juan Wu , Huiguang Li , Yue Zhang , Fangshi Jiang , Yanhe Huang , Jinshi Lin

{"title":"Structural sediment connectivity dynamics in a representative watershed of the southern China’s red soil region: Response to land use/cover changes","authors":"He Wang , Songyang Li , Juan Wu , Huiguang Li , Yue Zhang , Fangshi Jiang , Yanhe Huang , Jinshi Lin","doi":"10.1016/j.ejrh.2025.102407","DOIUrl":"10.1016/j.ejrh.2025.102407","url":null,"abstract":"<div><h3>Study region</h3><div>Red soil region of southern China</div></div><div><h3>Study focus</h3><div>Land use/cover changes significantly affect the ecosystem’s potential for sediment detachment and transport capacity. These impacts can be manifested through variations in sediment connectivity, which reflects the continuity and strength of runoff and sediment pathways at a given point in time. Combining the sediment connectivity index (IC) with observed sediment data, this study assessed the dynamics of structural sediment connectivity and its response to land use/cover changes in a representative watershed of southern China's red soil region.</div></div><div><h3>New hydrological insight for the region</h3><div>Over four decades of soil erosion control, land use and landscape patterns have changed minimally, but the vegetation cover has increased significantly. The mean IC values were −0.88, −0.87 and −3.77 in 1986, 2000 and 2019, respectively, indicating a great decrease in structural sediment connectivity. Croplands and highly fragmented landscape patterns can lead to high IC values. The changes in vegetation cover were the direct cause of IC reduction, which resulted in temporal variations in structural sediment connectivity. These variations aligned chronologically with regional development patterns and policies. Sediment connectivity changes became the main factor controlling sediment yield in the watershed from 2001 to 2020, reducing it by 57.56 % compared to 1982–1995 period. These findings provide spatial guidance for optimizing landscape patterns and cropland management to mitigate sediment connectivity hotspots in red soil regions.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"59 ","pages":"Article 102407"},"PeriodicalIF":4.7,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143855232","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

Agricultural drought recovery characteristics and water requirement for rapid drought recovery in the Huai River Basin, China 淮河流域农业干旱恢复特征及快速恢复需水量

IF 4.7 2区地球科学

Journal of Hydrology-Regional Studies Pub Date : 2025-04-21 DOI: 10.1016/j.ejrh.2025.102396

Jiaying Liu , Yonghua Zhu , Robert Horton , Haishen Lü , Naveed Ahmed , Yinghao Fu , Yingying Xu , Tingxing Chen , Yiling Yao

{"title":"Agricultural drought recovery characteristics and water requirement for rapid drought recovery in the Huai River Basin, China","authors":"Jiaying Liu , Yonghua Zhu , Robert Horton , Haishen Lü , Naveed Ahmed , Yinghao Fu , Yingying Xu , Tingxing Chen , Yiling Yao","doi":"10.1016/j.ejrh.2025.102396","DOIUrl":"10.1016/j.ejrh.2025.102396","url":null,"abstract":"<div><h3>Study region</h3><div>Huai River Basin.</div></div><div><h3>Study focus</h3><div>The study aims to analyze the spatiotemporal changes in the occurrence and recovery of agricultural droughts of different degrees in the Huai River Basin through the Standardized Soil Moisture Index (SSMI) and the Weighted Average Precipitation Index (WAPI). It also determines the cumulative precipitation amounts leading to the rapid recovery of agricultural droughts with 1–2 days of additional rainfall. This method is designed to accurately identify the characteristics of drought recovery and the actual effective weighted precipitation required for rapid recovery on a daily scale.</div></div><div><h3>New hydrological insights</h3><div>The findings indicate that mild and extreme droughts frequently occur in the Huai River Basin. The longer the drought persists, the longer the recovery time. Recovery times in the southern part are the shortest. In the past 33 years, there have been 22 events of rapid recovery from agricultural drought within one day following a period with sufficient cumulative rainfall. On average, each event requires a Weighted Average Precipitation Index (WAPI) of 660 mm based on cumulative rainfall from an earlier time period to facilitate drought recovery within one day of additional rainfall. To rapidly recover from severe drought and more severe drought conditions within two days of heavy rainfall, the corresponding WAPI based on sufficient cumulative rainfall from an earlier time period reach nearly 1000 mm.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"59 ","pages":"Article 102396"},"PeriodicalIF":4.7,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143855151","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

Runoff simulation and analysis of water source in the high-altitude and cold region of the Shaliu River Basin 沙柳河流域高海拔寒区水源径流模拟与分析

IF 4.7 2区地球科学

Journal of Hydrology-Regional Studies Pub Date : 2025-04-19 DOI: 10.1016/j.ejrh.2025.102294

Yunying Wang , Zongxing Li , Zongjie Li , Baijuan Zhang , Guohui Li , Lanping Si

{"title":"Runoff simulation and analysis of water source in the high-altitude and cold region of the Shaliu River Basin","authors":"Yunying Wang , Zongxing Li , Zongjie Li , Baijuan Zhang , Guohui Li , Lanping Si","doi":"10.1016/j.ejrh.2025.102294","DOIUrl":"10.1016/j.ejrh.2025.102294","url":null,"abstract":"<div><h3>Study Region</h3><div>The Shaliu river basin, a small basin in a high-altitude cold region.</div></div><div><h3>Study Focus</h3><div>An improved SWAT model was used to simulate monthly runoff from 1960 to 2022. The snowmelt module was improved using a dual-factor method of temperature and radiation, and the surface runoff module was optimized under the condition of permafrost presence. The period from 1960 to 1964 was used as the model warm-up period, 1965–2000 as the calibration period, and 2001–2022 as the validation period. The study quantified the contributions of different components of the basin to runoff, analyzed the changes in blue and green water, and assessed the contributions of meteorological factors to runoff changes.</div></div><div><h3>New Hydrological Insights for the Region</h3><div>The study identified CN2, GW_DELAY, SOL_BD, and ESCO as the key parameters affecting annual runoff changes. The improved SWAT model showed better performance in simulating runoff, especially during snowmelt and permafrost periods, with improved R² 0.686 to 0.702), reduced PBIAS (by 4.8 %), and increased NSE (by 0.041) in the calibration period. The snowmelt contribution rate was 6.5 %, peaking in spring, The contribution of snowmelt is decreasing with time and the contribution of baseflow is increasing on time scales. Blue water increased significantly annually, green water decreased slightly, and the green water coefficient decreased. The highest values were observed in August. Spatially, green water was higher in the middle and lower at both ends, blue water was higher upstream, and the green water coefficient was lower upstream. At the basin scale, green water was more abundant than blue water. Precipitation, temperature, and relative humidity were the main factors affecting runoff changes. This study offers a theoretical basis for water resource management in cold-region watersheds.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"59 ","pages":"Article 102294"},"PeriodicalIF":4.7,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143847651","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

Bridging scales and borders on water availability and use in the transboundary Volta River Basin: A water accounting approach 跨界沃尔特河流域水可用性和利用的桥接尺度和边界：一种水会计方法

IF 4.7 2区地球科学

Journal of Hydrology-Regional Studies Pub Date : 2025-04-19 DOI: 10.1016/j.ejrh.2025.102377

Afua Owusu , Komlavi Akpoti , Mansoor Leh , Tharindu Perera , Lahiru Madushanka , Kirubel Mekonnen , Primrose Tinonetsana , Noosha Tayebi , Ana Cecilia Escalera-Rodriguez , Rafatou Fofana , Naga Manohar Velpuri

{"title":"Bridging scales and borders on water availability and use in the transboundary Volta River Basin: A water accounting approach","authors":"Afua Owusu , Komlavi Akpoti , Mansoor Leh , Tharindu Perera , Lahiru Madushanka , Kirubel Mekonnen , Primrose Tinonetsana , Noosha Tayebi , Ana Cecilia Escalera-Rodriguez , Rafatou Fofana , Naga Manohar Velpuri","doi":"10.1016/j.ejrh.2025.102377","DOIUrl":"10.1016/j.ejrh.2025.102377","url":null,"abstract":"<div><h3>Study region</h3><div>Volta Basin</div></div><div><h3>Study focus</h3><div>Water management in transboundary basins is challenging due to the interaction of natural and human factors across political borders. The Volta River Basin, shared by six West African countries, exemplifies this with variable water distribution and socio-economic pressures. This study presents a comprehensive multi-scale water accounting of the basin, assessing water flows and usage at basin-wide, sub-basin, and riparian country scales from 2003 to 2021.</div></div><div><h3>New hydrological insights for the region</h3><div>The results reveal average basin closure is 55 % with room for additional water allocation given that utilizable water in the basin is 20 km<sup>3</sup>/year and almost 25 % of the basin’s exploitable water is non-recoverable water (wastewater). Sub-basin analysis showed variations in average annual rainfall, ranging from 940 to 1250 mm/year, and groundwater recharge rates (18–64 mm/year), with southern sub-basins receiving more rainfall and having higher recharge rates. Similarly at the country level, variability in rainfall (630–1220 mm/year) and recharge rates (20–280 mm/year) were noted, with downstream countries benefiting from higher rainfall and significant inflows from upstream countries. The analysis underscored the interconnectedness of water use across the basin's riparian countries. The study's findings give insights for the strategic management of water resources and the crucial need for enhanced cooperation among riparian countries to address shared challenges and opportunities in the Volta Basin.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"59 ","pages":"Article 102377"},"PeriodicalIF":4.7,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143847647","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

Climate change threatens water resources for major field crops in the Serbian Danube River Basin by the mid-21st century 到21世纪中叶，气候变化将威胁到塞尔维亚多瑙河流域主要农田作物的水资源

IF 4.7 2区地球科学

Journal of Hydrology-Regional Studies Pub Date : 2025-04-19 DOI: 10.1016/j.ejrh.2025.102404

Jamshid Jalali , Nishan Bhattarai , Jillian Greene , Tao Liu , Oskar Marko , Mirjana Radulović , Molly Sears , Sean A. Woznicki

{"title":"Climate change threatens water resources for major field crops in the Serbian Danube River Basin by the mid-21st century","authors":"Jamshid Jalali , Nishan Bhattarai , Jillian Greene , Tao Liu , Oskar Marko , Mirjana Radulović , Molly Sears , Sean A. Woznicki","doi":"10.1016/j.ejrh.2025.102404","DOIUrl":"10.1016/j.ejrh.2025.102404","url":null,"abstract":"<div><h3>Study region</h3><div>Serbian Danube River Basin</div></div><div><h3>Study focus</h3><div>As climate change makes weather patterns more erratic, water supply for agriculture is becoming increasingly uncertain. This is concerning in the Serbian Danube River Basin, where crops are mainly rainfed and the growing season is becoming warmer and drier. Assessing the balance between future agricultural water demand and availability in a changing climate is critical to address agricultural water scarcity. To understand how changing climate will affect water availability during 2041–2070, we used the Soil and Water Assessment Tool+ hydrological model with field-scale crop rotations and irrigated extent data and forced with regional climate model data under two representative concentration pathways (RCP4.5 and RCP8.5).</div></div><div><h3>New hydrological insights for the region</h3><div>Declining precipitation, increasing evaporative demand, and lack of widespread irrigation will intensify green water (i.e., soil moisture from rainfall that rainfed systems rely on) scarcity and crop water stress across the spring-planted, rainfed cropping systems in Serbia during the peak growing season. Irrigated fields, currently rare, are barely offsetting green water scarcity and crop water stress and will need to increase irrigation by 10–20 % just to maintain current levels of green water scarcity and crop water stress. These findings highlight that agricultural producers in Serbia will need to adjust agricultural practices and likely expand irrigation to tackle increased water demand, but this may reduce blue water availability.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"59 ","pages":"Article 102404"},"PeriodicalIF":4.7,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143847652","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

Sustainable groundwater resource extraction influenced by changing climate and pit lake expansion in East Bohemia, Czech Republic 气候变化和坑湖扩张对捷克东波希米亚地下水资源可持续开采的影响

IF 4.7 2区地球科学

Journal of Hydrology-Regional Studies Pub Date : 2025-04-18 DOI: 10.1016/j.ejrh.2025.102400

Petr Vaníček , Adam Říčka , Tomáš Kuchovský , Bibiána Pasternáková , Kateřina Chroustová , Karel Šuhajda

{"title":"Sustainable groundwater resource extraction influenced by changing climate and pit lake expansion in East Bohemia, Czech Republic","authors":"Petr Vaníček , Adam Říčka , Tomáš Kuchovský , Bibiána Pasternáková , Kateřina Chroustová , Karel Šuhajda","doi":"10.1016/j.ejrh.2025.102400","DOIUrl":"10.1016/j.ejrh.2025.102400","url":null,"abstract":"<div><h3>Study region</h3><div>Ceperka groundwater resource, East Bohemia region, Czech Republic</div></div><div><h3>Study focus</h3><div>The expansion of the pit lakes with negative water table balance threatens the Ceperka groundwater resource sustainability. The expected change in the water table balance was estimated according to climate projections. A numerical model was developed to examine how the sustainable extraction could change during the 21st century assuming the pit lakes continue to expand and climate change progresses.</div></div><div><h3>New hydrological insights for the region</h3><div>Evaluation of the water table balance indicates that the current specific water loss of 6 L/s/km<sup>2</sup> is expected to increase to 7.2 L/s/km<sup>2</sup> in the period 2061–2090 assuming a medium climate scenario. The change in the water table balance of the pit lakes expanding at a rate of 1 km<sup>2</sup>/20 years would decrease the sustainable extraction by 6 % alone. However, climate change is also responsible for the decline of groundwater recharge and water levels. When this is considered, the sustainable extraction would reduce by 18 % in 2061–2090. Continuing on this trajectory would result in a water supply shortage within approximately forty years from now. It appears that the change in hydrogeological conditions has a significant impact as well. Still, an additional pit lake expansion should be carefully considered in areas with a negative water table balance to mitigate the decrease in sustainable extraction.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"59 ","pages":"Article 102400"},"PeriodicalIF":4.7,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143843925","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

Drinking water availability from scattered crystalline aquifers: Climatic risks evaluated from production data in France 来自分散结晶含水层的饮用水供应：根据法国生产数据评估气候风险

IF 4.7 2区地球科学

Journal of Hydrology-Regional Studies Pub Date : 2025-04-18 DOI: 10.1016/j.ejrh.2025.102405

Alexandre Boisson , Cyril Bourgeois , Noémie Neverre

{"title":"Drinking water availability from scattered crystalline aquifers: Climatic risks evaluated from production data in France","authors":"Alexandre Boisson , Cyril Bourgeois , Noémie Neverre","doi":"10.1016/j.ejrh.2025.102405","DOIUrl":"10.1016/j.ejrh.2025.102405","url":null,"abstract":"<div><h3>Study region</h3><div>Brittany, France.</div></div><div><h3>Study focus</h3><div>Climate change and population growth are increasing pressure on exploited drinking water resources networks. Even in temperate climates, this pressure can become significant, particularly in areas where groundwater resources and storage capacities are limited, such as regions underlain by crystalline rocks. The challenge is further compounded in contexts involving small, scattered, and interconnected production units. Assessing failure risks and supply vulnerability is often challenging due to limited monitoring, insufficient data, and poor coordination among the many stakeholders involved. To address this gap, we developed a framework to quantify the vulnerability of drinking water resources by exploitation type (shallow wells, deep boreholes, surface water) using production data in contexts where resource monitoring is minimal or absent.</div></div><div><h3>New hydrological insights</h3><div>We demonstrate that variations in water production can serve as a proxy for evaluating the state of exploited resources in contexts where direct resource monitoring is lacking — a common limitation for small-scale water resource assessments. The framework allows for the identification of compensation mechanisms between surface and groundwater resources and highlights the risks of shortages related to climatic variations. The study highlights the vulnerability of the area and provides insights for improving the security of drinking water supplies. It underscores the importance of considering productivity variations at monthly time steps, rather than limiting projections to an annual basis.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"59 ","pages":"Article 102405"},"PeriodicalIF":4.7,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143843928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Regional controls on the hydrochemistry of the Chalk aquifer of East Anglia, UK 英国东安格利亚白垩含水层水化学的区域控制

IF 4.7 2区地球科学

Journal of Hydrology-Regional Studies Pub Date : 2025-04-18 DOI: 10.1016/j.ejrh.2025.102383

John Anthony Heathcote

{"title":"Regional controls on the hydrochemistry of the Chalk aquifer of East Anglia, UK","authors":"John Anthony Heathcote","doi":"10.1016/j.ejrh.2025.102383","DOIUrl":"10.1016/j.ejrh.2025.102383","url":null,"abstract":"<div><h3>Study region</h3><div>The study region is the Chalk (limestone) aquifer of East Anglia, UK, bounded by the North Sea to the north and east, the River Colne in the south, and the limit of Chalk outcrop to the west, around 8000 km<sup>2</sup>.</div></div><div><h3>Study focus</h3><div>The study documents the variation in Chalk groundwater chemistry over the region, based on analytical data for ∼900 sites, and explores the causes of this variation.</div></div><div><h3>New hydrological insights for the region</h3><div>The chemistry of the water in the limestone aquifer varies widely, from < 10 to > 600 mg L<sup>-1</sup> calcium, 120–660 mg L<sup>-1</sup> bicarbonate. Calcium and bicarbonate concentrations are typically higher than in the Chalk elsewhere in the UK. Chloride and sulphate are also higher, but nitrate is often low or absent. The strata overlying the Chalk determine whether the carbonate chemistry has evolved under closed- or open-system conditions, has been affected by leaching from overlying strata during recharge, and whether ion exchange replacement of calcium by sodium has taken place. The equilibrium partial pressure of carbon dioxide has proved to be particularly useful in understanding the origin of fresh groundwaters. Some water is clearly modern recharge water; some water is much older, possibly thousands of years. Brackish water at depth is deduced from circumstantial evidence to be related to a marine inundation at ∼2 Ma.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"59 ","pages":"Article 102383"},"PeriodicalIF":4.7,"publicationDate":"2025-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143847650","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

Contribution of snow water equivalent to the terrestrial water storage changes in High Mountain Asia based on multiple datasets 基于多数据集的亚洲高山雪水当量对陆地储水量变化的贡献

IF 4.7 2区地球科学

Journal of Hydrology-Regional Studies Pub Date : 2025-04-17 DOI: 10.1016/j.ejrh.2025.102401

Qian Li , Weili Duan , Tao Yang , Yuting Fan , Lanhai Li

{"title":"Contribution of snow water equivalent to the terrestrial water storage changes in High Mountain Asia based on multiple datasets","authors":"Qian Li , Weili Duan , Tao Yang , Yuting Fan , Lanhai Li","doi":"10.1016/j.ejrh.2025.102401","DOIUrl":"10.1016/j.ejrh.2025.102401","url":null,"abstract":"<div><h3>Study region</h3><div>High Mountain Asia.</div></div><div><h3>Study focus</h3><div>Snow water <em>equivalent</em> (SWE) storage is a crucial component of the terrestrial water storage (TWS) in High Mountain Asia (HMA). This study employed monthly data from the Global Land Data Assimilation System (GLDAS) NOAH, GLDAS catchment land surface model (CLSM), European Centre for Medium Range Weather Forecasts reanalysis version 5 land (ERA5L), High Asia refined analysis (HAR), and the China Meteorological Administration’s global Land surface reanalysis Interim (CRA) during 2003–2020 to compare the TWS anomaly (TWSA). Additionally, the contribution of SWE to the TWS changes was estimated.</div></div><div><h3>New hydrological insights for the region</h3><div>The results reveal that the TWSA had a large variability for the multiple datasets while the SWE anomaly (SWEA) time series exhibited more consistent fluctuations. The annual percentage of the SWEA to the TWSA ranged between 7.40–26.95 % for the multiple datasets, indicating the relatively important role of the SWE dynamics in the study area. Three main types of contributions were found in HMA, i.e., positive contributions when the TWSA and SWEA both decreased or both increased, and a negative contribution when the SWEA increased and the TWSA decreased. The individual role of the SWEA in controlling the total TWSA showed large regional and seasonal heterogeneity. The results of this study provide an essential reference for water management and availability to large downstream population.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"59 ","pages":"Article 102401"},"PeriodicalIF":4.7,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143839114","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