Hydrological Processes最新文献

{"title":"Quantifying Uncertainty in Terrestrial Water Storage Change Estimates due to Impacts of Budget Component Errors and GRACE-Based Adjustments","authors":"Zengliang Luo,&nbsp;Da Zhang,&nbsp;Xiangyi Ding,&nbsp;Lunche Wang","doi":"10.1002/hyp.70179","DOIUrl":"https://doi.org/10.1002/hyp.70179","url":null,"abstract":"<div>\u0000 \u0000 <p>Accurately estimating terrestrial Water Storage Changes (TWSC) remains challenging due to its small magnitude and sensitivity to errors in driving variables. The water balance equation provides a direct means of estimating TWSC, but errors in its components—precipitation (P), evapotranspiration (ET), and streamflow (Q)—inevitably propagate into the TWSC estimates. Despite its widespread use, the performance of water balance-derived TWSC estimates has not been well evaluated across global climatic zones. Here, we assess the performance of TWSC estimates using water balance computations across 84 basins spanning diverse climatic conditions. We then investigate how errors in budget components contribute to discrepancies in TWSC estimates. To improve accuracy, GRACE-derived TWSC data were integrated to adjust water balance-derived TWSC, which, in turn, impacts the precision of the input variables P, ET, and Q. We further evaluate these impacts, quantifying their effects on data consistency and accuracy. Five P products, four ET datasets, one observed Q dataset, and four GRACE TWSC products were combined into 80 combinations for each basin, ensuring robust results. Our findings show that errors in water balance-derived TWSC account for approximately 35% of the GRACE-observed TWSC magnitude. The contributions of P, ET, and to the TWSC estimation error are 47.39%, 44.82%, and 7.79%, respectively. While GRACE data corrections improved TWSC accuracy by ~20%, they also introduced a ~12% error into the budget components. These results provide crucial insights into the strengths and limitations of water balance computations for TWSC estimation and underscore the significance of accurate driving datasets. This study advances the understanding of TWSC dynamics, offering a pathway to improve global water resource assessments and management strategies.</p>\u0000 </div>","PeriodicalId":13189,"journal":{"name":"Hydrological Processes","volume":"39 6","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144315288","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Characterising Water-Quality Response After the 2020 Cameron Peak Fire Using a Novel Application of the Weighted Regressions on Time, Discharge and Season Method","authors":"Manya H. Ruckhaus,&nbsp;David W. Clow,&nbsp;Robert M. Hirsch,&nbsp;Tanner W. Chapin","doi":"10.1002/hyp.70178","DOIUrl":"https://doi.org/10.1002/hyp.70178","url":null,"abstract":"<p>The frequency and severity of wildfire activity in the western United States emphasises the utility of hydrologic models to predict water-quality response. This study presents a novel application of the Weighted Regressions on Time, Discharge and Season (WRTDS) method to assess potential changes in water quality in two watersheds draining the North Fork Big Thompson River and Buckhorn Creek in Larimer County, Colorado that were affected by the 2020 Cameron Peak Fire. WRTDS models were developed using 12 years of pre-fire data and used to estimate the expected constituent concentrations for each sample collected in the post-fire record. The predicted constituent concentrations modelled in this manner are representative of conditions in the absence of fire and allow pre-fire and post-fire stream chemistry to be quantitatively compared. Nitrate and total phosphorus concentrations showed the greatest differences between the observed and predicted concentrations, which were up to 153% greater than expected. We linked changes in source inputs and elevation as likely controls on the difference in magnitude and timing of response between the two watersheds. Post-fire arsenic and manganese concentrations were greater than the predicted concentrations in both watersheds, with arsenic up to 42% greater and manganese up to 85% greater than the model predictions. Post-fire calcium, magnesium, chloride and sulphate concentrations were greater than model predictions at the North Fork and less than the predictions at Buckhorn. We argue that greater burn severity at Buckhorn likely reduced soil–water infiltration and led to bypassed subsurface flow paths through a major lithologic source of these constituents. Post-fire changes in total organic carbon and dissolved iron concentrations were weakly supported by the model results, as observed concentrations were largely within the bounds of expected values calculated from the pre-fire model. The novel approach to WRTDS presented in this study could be a useful tool for water-quality assessments after land disturbances in the western United States.</p>","PeriodicalId":13189,"journal":{"name":"Hydrological Processes","volume":"39 6","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/hyp.70178","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144299764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Rainfall-Runoff Estimation for Groundwater Enhancement Through Remote Sensing and GIS-Based Geostatistical Model","authors":"Pradeep Kamaraj,&nbsp;Deepa Subramani,&nbsp;Dmitry E. Kucher,&nbsp;Muhammad Aslam,&nbsp;Yahia Said,&nbsp;Aqil Tariq","doi":"10.1002/hyp.70180","DOIUrl":"https://doi.org/10.1002/hyp.70180","url":null,"abstract":"<div>\u0000 \u0000 <p>Groundwater decline in any region is a significant issue that has been rising daily. Rainfall and runoff assessment of the area gives groundwater management and sustainability ideas since the arid regions rely mainly on rainfall for groundwater recharge. Therefore, rainfall-runoff is one of the necessary studies to implement groundwater recharge. This study primarily focuses on rainfall-runoff estimation with the help of Geographic Information System (GIS) techniques. Three input variables, topographic, remote sensing, and Antecedent Moisture Condition (AMC), were adopted to define this Soil Conservation Service—Curve Number (SCS-CN) model. Texture-based soil categorization was used to create the hydrologic soil group (HSG) map. The dominance of D-type HSG was categorised as a high runoff region. The 10 years (2006–2015) of rainfall information were used to generate the rainfall spatial map based on the Theissen-Polygon method. The rainfall-runoff data shows that the higher rainfall (1477.5 mm) and runoff (470.8 mm) during 2007. The Land Use and Land Cover (LULC) map was created through the Indian Remote Sensing Satellite P6's Linear Imaging Self-Scanning Sensor-IIi (IRS-P6 LISS-III) image. In dry, normal, and wet circumstances, the corresponding curve numbers (CN) values were CN 1 = 62.3, CN 2 = 79.03, and CN 3 = 89.8. In addition, the mean surface runoff was calculated as 330.2 mm with an average runoff volume of 164.13 mm³, which was 13.91% of the overall average rainfall. The final results (rainfall and runoff) also strongly correlated (<i>r</i> = 0.857). Thus, this study can be a basis for many researchers in various water resource management studies.</p>\u0000 </div>","PeriodicalId":13189,"journal":{"name":"Hydrological Processes","volume":"39 6","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144292493","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Understanding Geochemical Processes in Surface and Groundwater of a Large Tropical Delta Using Dissolved Strontium Cycling and Evolution","authors":"Prakrity Majumder,&nbsp;Kousik Das,&nbsp;Madhumita Chakraborty,&nbsp;Abhijit Mukherjee","doi":"10.1002/hyp.70162","DOIUrl":"https://doi.org/10.1002/hyp.70162","url":null,"abstract":"<div>\u0000 \u0000 <p>Aquifers adjoining tropical oceans, such as the Ganges-Brahmaputra-Meghna river fluvio-deltaic system, host &gt; 30% of the global population, highlighting the importance of understanding their geochemical signatures and the processes governing them. Here, Sr signature has been used as a conservative geochemical tracer together with some other major ions to delineate the hydrological processes and salinisation of groundwater by exchange with surface water (sea, river, and tidal creeks) and multi-depth groundwater in and around the Ganga River mega-delta. Our study results revealed that there are significant differences between the studied hydrological reservoirs and a change in lithological and hydrogeochemical conditions reflects changes in sediment source and dominant geochemical processes. An increasing rate of chemical weathering is observed within the delta system for river water. Similarly, Sr values are indicative of higher interaction of groundwater with aquifer sediment, which suggests a longer residence time observed in inland parts of the basin. Silicate weathering with minor carbonate weathering is the dominant process regulating the Sr cycling between lithologic and hydrologic reservoirs within the basin. In contrast, the groundwater Sr in coastal, delta-front aquifer systems is dominantly influenced by exchanges with seawater. The intruded brackish water mixes with resident fresh groundwater and is discharged into the coastal ocean as submarine groundwater discharge.</p>\u0000 </div>","PeriodicalId":13189,"journal":{"name":"Hydrological Processes","volume":"39 6","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144244246","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 Integrated Statistical-Physical-Machine Learning Framework: Quantifying Human-Induced Terrestrial Water Storage Loss","authors":"Yifan Huang,&nbsp;Xiang Zhang,&nbsp;Jing Xu,&nbsp;Yilun Li","doi":"10.1002/hyp.70175","DOIUrl":"https://doi.org/10.1002/hyp.70175","url":null,"abstract":"<div>\u0000 \u0000 <p>Terrestrial water storage (TWS) is influenced by both climate changes and human activities, yet research on the impacts of human activities remains limited. Here, a data-driven methodology is presented, integrating statistical analysis, physical equations and machine learning models to assess and quantify the influence of human activities on catchment TWS arising from engineering projects and water usage. The results validate a diminished water storage capacity of the Han River Basin (HRB) due to urbanization and decreasing natural permeable areas, resulting in a decrease in the maximum lagged time range from 4 months to 1 month, with a higher forgetting rate of 0.5 per lagged time. The alternation in water storage capacity affected the precipitation–runoff process. While climate change contributes to over 60% of the total effects, the substantial influence of human activities on TWS remains pivotal. Prior to the construction of the Middle Route of the South-to-North Water Diversion Project (1980–2003), human activities led to a multi-annual average TWS reduction of 14.7 km³ within the HRB. Post-construction (2015–2019), this figure rose to 19 km³, with human water usage and the reduction of groundwater flux feedback contributing 14.8 and 4.2, respectively. The proposed method provides a novel perspective for exploring the human impacts on TWS, potentially applicable to various geographical regions.</p>\u0000 </div>","PeriodicalId":13189,"journal":{"name":"Hydrological Processes","volume":"39 6","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144244247","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multiscale Analysis of Sediment Dynamics Associated With Reservoir Flushing Operations","authors":"Tulio Soto Parra,&nbsp;Giulia Stradiotti,&nbsp;Sebastiano Piccolroaz,&nbsp;Giuseppe Roberto Pisaturo,&nbsp;David Farò,&nbsp;Maurizio Righetti,&nbsp;Luigi Fraccarollo,&nbsp;Guido Zolezzi","doi":"10.1002/hyp.70159","DOIUrl":"https://doi.org/10.1002/hyp.70159","url":null,"abstract":"<p>The ecological effects of sediment flushings from artificial reservoirs have been widely documented, but the underlying sediment dynamics are less well known. We investigated sediment dynamics associated with a long flushing event divided into two periods (2 and 1 week) in an Alpine river, each followed by a clear water release (‘washing’) from the reservoir. Suspended sediment dynamics were investigated at the event and annual time scale, and at the river segment (~1000 channel widths) and reach (~100 channel widths or less) spatial scales. Analysis of suspended sediment concentration (SSC) and streamflow time series from 5 in situ calibrated optical turbidity sensors reveals a downstream decrease in the total passing sediment fluxes, a spatial trend that is paralleled by the theoretical suspended sediment transport capacity, allowing for the estimation of the deposited fine sediment volume in different reaches. Washing events result in variable effects among reaches, with some experiencing net sediment entrainment and others net deposition. Out of 16 quantified sediment fluxes, 5 were statistically significant with <i>p</i> &lt; 0.05, with an average uncertainty of 23% in fine sediment flux quantification. Georeferenced analysis of coloured gravel-cobble plots before and after the two flushing events revealed partial reach-scale mobility of the coarse bed surface material, particularly in the geomorphic units located at lower elevations and more exposed to higher flows (edges of side bars nearby riffles or rapids), while local fine sediment deposition was observed at less exposed units, such as side channels or point bars in river bends. Grain size distributions of surface sediment taken in the same locations before and 1 month after the flushing reveal a clear shift towards a finer sediment composition, which is partially retrieved also 1 year after the event. Event-averaged SSC values during the flushing are considerably higher compared to natural flood events in such a regulated river, with SSC-streamflow relations being highly irregular and event-dependent, especially during the flushing. The work shows the relevance of multi-scale (time and space) investigation of sediment dynamics for planning and monitoring sediment flushing from artificial reservoirs.</p>","PeriodicalId":13189,"journal":{"name":"Hydrological Processes","volume":"39 6","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/hyp.70159","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144244259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modelling Glacier Mass Balance and Runoff in the Kaskawulsh River Headwaters of Southwest Yukon, Canada, 1980–2022","authors":"Katherine M. Robinson,&nbsp;Gwenn E. Flowers,&nbsp;Michel Baraër,&nbsp;David R. Rounce","doi":"10.1002/hyp.70150","DOIUrl":"https://doi.org/10.1002/hyp.70150","url":null,"abstract":"<p>The highly-glacierized headwaters of the Kaskawulsh River is home to 9% of all glacier ice in Yukon, Canada, and was the source of a sudden meltwater-rerouting event in 2016 that has had significant downstream consequences. We use a distributed mass-balance model driven by downscaled and bias-corrected climate reanalysis data that incorporates observations of sub-debris melt, accumulation, and transient snowline positions to estimate the 1980–2022 glacier mass balance, discharge, and water budget of the Kaskawulsh River headwaters. We estimate a catchment-wide cumulative mass loss of 18.02 Gt over 1980–2022 (−0.38 ± 0.15 m w.e. a⁻¹) and a mean annual discharge of ~60 m³ s⁻¹, 25% of which originates from non-renewable glacier wastage. The water budget is dominated by glacier ice melt, accounting for 61% of mean annual discharge, followed by snowmelt at 31%, rainfall at 6%, and melt from refrozen ice layers at 2%. Extreme negative and positive mass-balance years produce the largest perturbations in glacier ice melt contributions to the water budget, ranging from a maximum of 67% following negative years to a minimum of 53% in positive years. Trend detection using the Mann-Kendall test shows that catchment-wide annual discharge increased by 3.9 m³ s⁻¹ per decade from 1980 to 2022, with statistically significant contributions from glacier ice melt (2.8 m³ s⁻¹ per decade) and rainfall (0.5 m³ s⁻¹ per decade). Increasing air temperatures and declining spring snowfall have lead to seasonally accelerated snowline retreat, earlier ice exposure, and earlier onset of net ablation in the catchment at a rate of ~5 days per decade. Based on summer air temperatures projected by CMIP6 and the empirical sensitivities of modelled runoff we calculate for 1980–2022, we hypothesise a more than doubling of annual runoff from this catchment by 2080–2100. This result, combined with a decrease in the variability of discharge from glacier ice melt over 1980–2022, suggests that this catchment is unlikely to reach “peak water” (i.e., peak glacier contribution to catchment runoff) this century.</p>","PeriodicalId":13189,"journal":{"name":"Hydrological Processes","volume":"39 6","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/hyp.70150","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144220201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impacts of Spatial Layout of Green Infrastructure in Urban Residential Areas on Surface Runoff During Long- and Short-Duration Rainfall Intensity: A Case Study in Wuhan, China","authors":"Zhen Wang,&nbsp;Zheyu Wang,&nbsp;Baole Zhang,&nbsp;Xuying Zhao","doi":"10.1002/hyp.70176","DOIUrl":"https://doi.org/10.1002/hyp.70176","url":null,"abstract":"<div>\u0000 \u0000 <p>Owing to the frequent occurrence of extreme weather triggered by ongoing climate change and progressively accelerating urbanisation, urban stormwater management has become a critical issue. Under such circumstances, Green Infrastructure (GI) has steadily become a sustainable way to mitigate urban flooding disasters. For this reason, it is essential to look into the dissimilar regulatory roles of GI under long- and short-duration rainfall intensity, especially in mega cities with continuous rainfall. Wuhan is located in a temperate region in the middle and lower reaches of the Yangtze River, featuring such rainfall intensities. This study selected 43 typical residential areas in Wuhan and combined buildings with GI, which generalised them as three major types of GI spatial layouts, namely Freestanding, Attached, and Mixed layouts. Through K-means clustering and multiple linear regression analyses, the peak flow, final water storage, and integrated runoff coefficients of dissimilar spatial layouts were analysed in a systematic manner. As suggested by the research findings, we ultimately reach the following conclusions: ① In the Freestanding spatial layout, the combination of distributed green space and pavilion buildings has the optimal rainfall resilience under long- and short-duration rainfall intensity. ② In the Mixed spatial layout, the integration of distributed green space and enclosed buildings has the best rainfall resilience under long- and short-duration rainfall intensity. ③ In the Mixed spatial layout, the combined roof type has short-duration rainfall resilience, while the combined vertical type has long-duration rainfall resilience. Integrating the surface runoff impacts of diverse spatial layouts for long-and short-duration rainfall intensity, a conclusion can be reached that the combination of distributed green space and distributed enclosed buildings is most suitable for Wuhan residential areas. The quantifiable methodology adopted in this study can be generalised and applied to other regions with similar climatic characteristics and urban morphology, providing a scientific basis for the construction of sponge cities and resilient cities.</p>\u0000 </div>","PeriodicalId":13189,"journal":{"name":"Hydrological Processes","volume":"39 6","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144219846","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hydro-Meteorological Drivers of Event Runoff Characteristics Under Analogous Soil Moisture Patterns in Three Small-Scale Headwater Catchments","authors":"Adriane Hövel,&nbsp;Christine Stumpp,&nbsp;Heye Bogena,&nbsp;Andreas Lücke,&nbsp;Peter Strauss,&nbsp;Günter Blöschl,&nbsp;Michael Stockinger","doi":"10.1002/hyp.70173","DOIUrl":"https://doi.org/10.1002/hyp.70173","url":null,"abstract":"<p>A catchment's runoff response to precipitation largely depends on the antecedent soil moisture and on the characteristics of the precipitation event, but also on other hydro-meteorological conditions, such as evapotranspiration. Studies investigating the effects of hydro-meteorological variables on runoff characteristics in catchments with daily temporal resolution mostly used surrogate measures of soil moisture derived from hydrological models or remote sensing products. Here, we applied a time series-based pattern search to up to 12 years of daily in situ measured soil moisture in three depths (5, 20 and 50 cm) in three headwater catchments, two of which are located in Germany (forest and grassland) and one in Austria (agriculture), to identify key variables influencing runoff characteristics under analogous soil moisture patterns. After detecting groups of analogous soil moisture, we split the corresponding runoff into similar and different patterns based on goodness-of-fit criteria and analysed their influencing hydro-meteorological variables with descriptive statistics and Spearman rank correlation coefficients (<i>ρ</i>). Results showed that in the forest and in the grassland catchment, the antecedent soil moisture mainly influenced runoff characteristics for analogous soil moisture patterns. In the agricultural catchment in Austria, both the antecedent soil moisture and rainfall characteristics had an influence on runoff characteristics. The proposed method can be used to evaluate hydro-meteorological drivers of event runoff characteristics under analogous soil moisture. In this way, hydrological processes that dominate in either group of similar or different runoff patterns can be differentiated, providing insights into the potential predictability of the respective runoff pattern.</p>","PeriodicalId":13189,"journal":{"name":"Hydrological Processes","volume":"39 6","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/hyp.70173","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144219845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of Groundwater Flows Using Geophysics and Tracer Tests in a Karst Area of Minas Gerais, Brazil","authors":"Débora Maria Diniz Barbosa,&nbsp;Rodrigo Sérgio de Paula,&nbsp;Jorge Roncato,&nbsp;Paulo Roberto Antunes Aranha,&nbsp;Pedro Henrique da Silva Assunção,&nbsp;Peter Marshall Fleming,&nbsp;Leila Nunes Menegasse Velásquez","doi":"10.1002/hyp.70143","DOIUrl":"https://doi.org/10.1002/hyp.70143","url":null,"abstract":"<div>\u0000 \u0000 <p>The mapping of hydrogeological continuities in heterogeneous aquifer systems presents significant challenges in understanding and managing groundwater resources. The studied area is part of the central portion of the state of Minas Gerais, Brazil, and covers the northern portion of the Lagoa Santa Karst Environmental Protection Area (EPA) and surroundings, a region that holds important archaeological and paleontological sites, as well as karst-fissural aquifers responsible for a large part of the urban and industrial supply of the area. In order to analyse the main underground flows and prove the hydrogeological connectivity between the Lagoa Santa Karst EPA and adjacent areas to the west, electroresistivity tests and application of a dye tracer were conducted around important karst springs in the region. The electroresistivity profiles indicate W-E direction flows, consistent with the regional flow, as well as contributions from S to N and NW to SE flows. The dye tracer test proved the underground connection of a sinkhole located to the west of the EPA with aquifers inserted in this conservation unit. Hydrogeological sections also indicate the continuity of the karst-fissural aquifers from west to east, towards the Velhas river. In addition, the probable areas of contribution of karst springs located near the western edge of the Lagoa Santa Karst EPA indicate that the current conservation unit does not cover a significant portion of the recharge areas of the local hydrogeological system. Therefore, it was proposed to either expand the Lagoa Santa Karst EPA or create a new environmental conservation unit in the area.</p>\u0000 </div>","PeriodicalId":13189,"journal":{"name":"Hydrological Processes","volume":"39 6","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144219894","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}