Journal of Hydrology-Regional Studies最新文献

{"title":"Unveiling four decades of spatiotemporal climate trends in Texas (1981–2023)","authors":"M.Shahriar Sonet ,&nbsp;Yunuen Reygadas","doi":"10.1016/j.ejrh.2025.102539","DOIUrl":"10.1016/j.ejrh.2025.102539","url":null,"abstract":"<div><h3>Study Region</h3><div>Texas, U.S.A.</div></div><div><h3>Study Focus</h3><div>Understanding climate variability is critical in Texas, a region influenced by moist air from the Gulf of Mexico and arid air from the Mexican Plateau. We investigated trends in annual and monthly mean temperature, total precipitation, and mean specific humidity, along with their monthly variability, from 1981 to 2023. We applied the modified Mann-Kendall test and Theil-Sen slope estimator to PRISM and GridMET 4-km datasets.</div></div><div><h3>New Hydrological Insights for the Region</h3><div>The most pronounced changes occurred during early summer, with Central Texas experiencing precipitation declines up to 125.27 mm and Far West Texas exhibiting temperature increases up to 3.68°C and humidity decreases up to 2.33 g/kg. A northwest–southeast gradient in humidity trends was observed, with declines across the Panhandle and increases near the Coast. Variability trends were more spatially and temporally extensive. Temperature variability increased from spring through fall by up to 1.19°C, particularly in Far West Texas. Precipitation variability intensified in May, August, and September, with swings up to 320 mm, especially in Central, Eastern, and Southern Texas. Humidity variability peaked in July and August in North Central and East Texas (up to 0.63 g/kg), while South Texas showed consistent declines. This reveals a growing climatic divide between humid and arid regions and underscores the need for adjusting cropcalendars, upgrading stormwater-systems, and expanding irrigation-infrastructure.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"60 ","pages":"Article 102539"},"PeriodicalIF":4.7,"publicationDate":"2025-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144330434","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}

{"title":"An alternative approach using electrical well logging for estimating porosity and hydraulic conductivity in volcanic aquifers of the upper Awash River sub-basin, Ethiopia","authors":"A. Muauz ,&nbsp;B. Berehanu ,&nbsp;H. Bedru","doi":"10.1016/j.ejrh.2025.102547","DOIUrl":"10.1016/j.ejrh.2025.102547","url":null,"abstract":"<div><h3>Study region</h3><div>Upper Awash River sub-basin, Ethiopia</div></div><div><h3>Study focus</h3><div>This study introduces an alternative method for characterizing volcanic aquifers using electrical well logging to estimate porosity and hydraulic conductivity. Integrating resistivity data with Archie’s law and the Kozeny–Carman equation, it provides a practical approach for evaluating aquifer properties in complex terrains. Analysis involved data from 335 wells, including resistivity logs, gamma logs, 1230 water quality samples, and 290 wells with lithological and pumping test records, addressing challenges faced by conventional techniques in volcanic regions.</div></div><div><h3>New insights for the region</h3><div>The study revealed apparent and intrinsic formation factors for basalt, tuff, and ignimbrite, which were applied to the Humble equation to estimate porosity, yielding values between 10.02 % and 23.14 %. Hydraulic conductivity, calculated using the Kozeny–Carman equation, ranged from 2.4 to 33.1 m/day. Validation through conventional pumping tests across seven sub-regions demonstrated strong alignment, with hydraulic conductivity values of 5.3 m/day (A), 2.8 m/day (B), 33.1 m/day (C), 4.6 m/day (D), 2.4 m/day (E), 8.1 m/day (F), and 6.2 m/day (G). Pumping test ranges of 0.2–63.6 m/day further corroborated the findings. This study underscores the potential of resistivity well logging as a cost-effective, efficient alternative for characterizing hydraulic properties in volcanic aquifers. It offers critical new insights for sustainable groundwater management in geologically complex regions, providing a replicable framework for similar settings worldwide.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"60 ","pages":"Article 102547"},"PeriodicalIF":4.7,"publicationDate":"2025-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144330435","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}

{"title":"Seasonal variability changes and trends in minimum discharge for Western Balkan rivers","authors":"Igor Leščešen ,&nbsp;Slobodan Gnjato ,&nbsp;Duško Vujačić ,&nbsp;Ana M. Petrović ,&nbsp;Ivan Radevski","doi":"10.1016/j.ejrh.2025.102529","DOIUrl":"10.1016/j.ejrh.2025.102529","url":null,"abstract":"<div><h3>Study region</h3><div>This study focuses on the Western Balkans, specifically analyzing river basins across Bosnia and Herzegovina, Serbia, Montenegro, and North Macedonia.</div></div><div><h3>Study focus</h3><div>The objective is to investigate long-term trends in minimum river discharges from 1961 to 2020, with an emphasis on low-flow events and their seasonal dynamics. Minimum discharge magnitudes were categorized as M1 (lower) and M2 (higher) based on the 1961–1990 baseline period. Seasonal Mann–Kendall trend tests were applied to detect significant changes in low-flow frequency and intensity across a representative network of gauging stations.</div></div><div><h3>New hydrological insights for the region</h3><div>The results reveal a statistically significant increase in the frequency of M1 low-flow events during summer, indicating more severe low-flow conditions. This trend is especially prominent across central and southern stations. Winter season analyses also suggest rising minimum discharge values, albeit with spatial variability. Conversely, M2 events, indicative of relatively higher minimum flows, show a consistent and statistically significant decline across nearly all stations during summer. These opposing trends reflect a regional intensification of summer low-flow conditions and a possible shift in the seasonal flow regime. The findings underscore the growing vulnerability of Western Balkan river systems to hydrological droughts, likely driven by climate change and local watershed pressures. These insights hold practical relevance for water resource management, highlighting the urgency of adaptive strategies for drought mitigation and ecological flow preservation.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"60 ","pages":"Article 102529"},"PeriodicalIF":4.7,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144313457","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}

{"title":"Effects of irrigation and canal networks on groundwater–land surface interactions in the middle Heihe River Basin, China","authors":"Zheng Lu ,&nbsp;Shuyan Peng ,&nbsp;Tingting Wu ,&nbsp;Jiaxin Lei ,&nbsp;Jiaxing Wei ,&nbsp;Xiaofan Yang","doi":"10.1016/j.ejrh.2025.102532","DOIUrl":"10.1016/j.ejrh.2025.102532","url":null,"abstract":"<div><h3>Study region</h3><div>Heihe River Basin, a typical endorheic river basin in northwest China.</div></div><div><h3>Study focus</h3><div>Agriculture is the highest water-consuming sector, utilizing approximately 70 % of available water resources, predominantly for irrigation purposes. However, limited studies have explicitly diagnosed the role of agriculture managements (such as irrigation and canal networks) on the water–energy cycles of the agriculture system. This study presents a suite of numerical experiments to analyze the effects of irrigation and canal networks on groundwater–land surface interactions using a 3D, fully integrated hydrologic model. The model has been validated against both observations and spatially distributed products, confirming its reliability in simulating regional hydrologic dynamics.</div></div><div><h3>New hydrologic insight for the region</h3><div>The findings reveal that irrigation expanded the shallow water table depths (WTD) zone by 30 % and increased summer and fall streamflow by approximately 10 %. Additionally, irrigation substantially reduced soil temperature at WTD of 0.01–10 m (i.e., cooling effect), altering the strong correlations between water table depth and latent heat flux. Moreover, irrigation canals heightened streamflow peaks, and increased spatial variability in surface heat flux differences, particularly in sensible heat flux, even causing localized reversals. This study provides scientific evidence in understanding the role of agriculture activities in local water resources management.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"60 ","pages":"Article 102532"},"PeriodicalIF":4.7,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144313458","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}

{"title":"Drought–flood abrupt alternation events increase soil nitrogen loss via surface runoff in a typical grain base in China","authors":"Wuxia Bi ,&nbsp;Yong Hu ,&nbsp;Baisha Weng ,&nbsp;Dawei Zhang ,&nbsp;Fan Wang ,&nbsp;Wenqing Lin ,&nbsp;Weiqi Wang ,&nbsp;Guoqiang Dong ,&nbsp;Denghua Yan","doi":"10.1016/j.ejrh.2025.102543","DOIUrl":"10.1016/j.ejrh.2025.102543","url":null,"abstract":"<div><h3>Study region</h3><div>Northern Anhui Plain, China.</div></div><div><h3>Study focus</h3><div>This study analyzed the nitrogen (N) mitigation (N storage in soil, plants, and surface runoff) under drought–flood abrupt alternation (DFAA) in summer maize farmland systems based on field experiments. Soil N loss due to DFAA in the summer maize planting area of the Northern Anhui Plain was simulated based on the critical threshold obtained from the field experiments.</div></div><div><h3>New hydrological insights for the region</h3><div>The experimental results showed that DFAA events reduced soil N storage and plant N storage by 14.9 % and 54.1 % compared to the control systems, respectively, while N storage in the water component of surface runoff in the DFAA treatments was 54.1 % higher. Numerical simulations revealed that the proportions of average annual soil N loss in topsoil were 14.98–19.58 % from 1964 to 2017 and 10.22–22.75 % from 2020 to 2050 in the study area. The highest average annual soil N loss shifted from the southwestern to the central and southeastern Northern Anhui Plain. The highest soil N loss in the hypothetical natural scenario was 49.0 % and 46.7 % lower compared to historical and future scenarios, respectively. The findings indicate that DFAA has significantly negative impacts on water quality. The quantitative analysis provides a reference for developing targeted regulation measures for the Northern Anhui Plain facing compound extreme events.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"60 ","pages":"Article 102543"},"PeriodicalIF":4.7,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144321130","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}

{"title":"Nitrate perturbation drives carbon cycling in a tropical mangrove estuary","authors":"Claris N. Sunjo ,&nbsp;Eliot A. Atekwana ,&nbsp;Henry M.D. Agbogun ,&nbsp;Isaac K. Njilah ,&nbsp;Hendratta N. Ali","doi":"10.1016/j.ejrh.2025.102534","DOIUrl":"10.1016/j.ejrh.2025.102534","url":null,"abstract":"<div><h3>Study region</h3><div>Douala, Cameroon, West Africa</div></div><div><h3>Study focus</h3><div>Tropical mangrove estuaries in sub-Saharan Africa receive far greater amounts of organic and inorganic carbon and pollutants compared to subtropical and temperate estuaries, yet they have not been investigated for their role in local, regional, or global cycling. The lack of data limits our understanding of the contributions of tropical mangrove estuaries in sub-Saharan Africa to global biogeochemical cycling. We document how anthropogenic pollution by nitrate drives carbon cycling in the open water of the tropical mangrove Wouri Estuary.</div></div><div><h3>New hydrologic insights</h3><div>We observed anomalously higher nitrate concentrations of 136–345 µmol/kg over a 15 km range from the estuary mouth. Whole estuary salinity-δ¹⁸O mixing is modeled as a two-endmember seawater-freshwater mixing. Although alkalinity and DIC were modeled as a two-endmember seawater-freshwater mixing, a three-component salinity-DIC-δ¹³C_DIC conservative model revealed a mismatch in stations in the lower estuary because of isotopically lower-than-expected δ¹³C_DIC. The isotopically lower than predicted δ¹³C_DIC is from nitrate-driven eutrophication and subsequent production of isotopically light CO₂ from organic matter oxidation. Modeled pCO₂ more than doubled from 20 times atmospheric in the upper estuary to 50 times atmospheric, increasing the DIC exchanged with the atmosphere. We conclude that anthropogenic nitrate pollution from shipping activities drives carbon cycling near the mouth of this tropical mangrove estuary.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"60 ","pages":"Article 102534"},"PeriodicalIF":4.7,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144307660","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}

{"title":"River baseflow in supplying reservoirs inflows of Tehran metropolis: A machine learning modeling based on influencing factors","authors":"Bahareh Hossein-Panahi ,&nbsp;Sara Mohandes Samani ,&nbsp;Amir-Reza Sadeghi ,&nbsp;Mahsa Shahi ,&nbsp;Seiyed Mossa Hosseini ,&nbsp;Esmaeel Parizi","doi":"10.1016/j.ejrh.2025.102528","DOIUrl":"10.1016/j.ejrh.2025.102528","url":null,"abstract":"<div><h3>Study regions</h3><div>Five watersheds Taleqan, Karaj, Latian, Lar, and Mamlou, located in Salt Lake Basin, around the Tehran Province in Northern Iran.</div></div><div><h3>Study focus</h3><div>This study investigates the dynamics of Baseflow (BF) in five reservoirs critical to Tehran’s water supply, using an 18-year dataset (1999–2016). While three digital filter methods were used to estimate daily baseflow in the studied reservoirs, the results from the Chapman-Maxwell method were selected for further investigation. Accordingly, daily streamflow data were processed using this method to separate baseflow and were aggregated monthly. The Baseflow Index (BFI), calculated as the ratio of mean BF to total streamflow, revealed BF contributions ranging from 55 % to 89 %, with soil moisture and snowmelt identified as dominant drivers. The BFAST algorithm detected breakpoints in BF trends, linking shifts to climatic variability and human activities like dam operations. Cross-correlation analysis highlighted SM (0–290 cm depth) as the strongest predictor of BF (CCF: 0.80–0.89), with immediate response times, while Smelt exhibited a seasonal lag (2–3 months). Snow cover, temperature, and vegetation (NDVI) also influenced BF, with NDVI showing a negative correlation due to increased water uptake. A Random Forest model, validated with 70 % training and 30 % testing data, confirmed SM’s primacy (R² up to 0.90 for Karaj Dam), followed by Smelt and humidity index. Breakpoints in BF trends, underscored the impact of land-use changes and climate shifts.</div></div><div><h3>New hydrological insights for the region</h3><div>In populated urban areas like Tehran Metropolis where streamflow is critical for domestic water supply, analyzing the role of BF in streamflow of reservoirs supplying the water demands and identifying its driving factors within watersheds is crucial for sustainable water management. The findings advocate for watershed-specific strategies, including enhanced soil moisture retention and adaptive reservoir management, to mitigate water scarcity. This study provides a framework for sustainable water management in semi-arid regions, emphasizing the integration of remote sensing and hydrological modeling to address climate and anthropogenic pressures.</div></div>","PeriodicalId":48620,"journal":{"name":"Journal of Hydrology-Regional Studies","volume":"60 ","pages":"Article 102528"},"PeriodicalIF":4.7,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144307659","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}

{"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 ,&nbsp;Jun Xia ,&nbsp;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}

{"title":"A framework for assessing groundwater vulnerability and pollution risk in transboundary aquifers: Insights from the Estonian-Latvian transboundary area","authors":"Magdaleena Männik ,&nbsp;Janis Bikše ,&nbsp;Enn Karro ,&nbsp;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}

{"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 ,&nbsp;Nawa Raj Pradhan ,&nbsp;Ian Floyd ,&nbsp;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}