Hydrological Processes最新文献

{"title":"Interplay of Crop Cover and Tillage on Runoff and Sediment Dynamics Under Simulated Rainfall: A Case Study in the Black Soil Region of Northeast China","authors":"Xiaoqiong Chen,&nbsp;Zhuodong Zhang,&nbsp;Bo Chen,&nbsp;Yintong Zhang,&nbsp;Peiting He","doi":"10.1002/hyp.70231","DOIUrl":"https://doi.org/10.1002/hyp.70231","url":null,"abstract":"<div>\u0000 \u0000 <p>We conducted 24 in situ simulated rainfall experiments featuring variable intensity over nine cropland plots subject to three tillage practices in the black soil region of Northeast China. The experimental setup involved eight scenarios, incorporating combinations of complete and zero crop cover, hourly rainfall amounts of 45 and 65 mm, and dry and wet antecedent soil moisture conditions. Our experiment shows that, compared to up and down the slope tillage (UDST) plots: (1) In the analysis aggregating multiple rainfall-runoff event data, contour tillage (CT) plots showed a notable increase in the reduction rates of total runoff, peak discharge and peak sediment concentration as crop cover increased from zero to complete. Specifically, reductions rose from 18%, 6% and 80% to 67%, 56% and 85%, respectively. In contrast, flat tillage (FT) plots showed a transition in total runoff and peak discharge from slightly more to slightly less, with a notable increase in peak sediment concentration reduction from 28% to 45% and (2) Analyses of individual events indicate that the ratio of total runoff, peak discharge and peak sediment concentration over CT plots compared to UDST plots range approximately in [6%, 100%], [6%, 100%] and [10%, 30%], these ratios over FT plots range in [60%, 130%], [60%, 130%] and [30%, 80%]. These data suggest that increased crop cover tends to amplify the total runoff and peak discharge reduction effects of tillage practices, and the runoff and sediment reduction rates vary notably across individual rainfall-runoff events. Additionally, both the magnitudes of amplification and variability depend on specific tillage practices employed. Notably, changes in crop cover have a more substantial impact on the runoff and sediment reduction effectiveness than variations in rainfall intensity and antecedent soil moisture. The necessity of employing in situ simulated rainfall experiments were also discussed. These findings highlight the interplay of crop cover and tillage on cropland runoff and sediment dynamics, offering valuable insights into improving soil and water conservation strategies.</p>\u0000 </div>","PeriodicalId":13189,"journal":{"name":"Hydrological Processes","volume":"39 8","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144767883","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 Complex Processes of Flood Inundation in a Regulated Coastal Lowland River: A Modelling Framework Integrating Hydrological, Hydraulic, Tidal and Geomorphic Data","authors":"Zafar Beg,&nbsp;Kumar Gaurav,&nbsp;Gaurav Kailash Sonkar,&nbsp;Vikrant Jain","doi":"10.1002/hyp.70227","DOIUrl":"https://doi.org/10.1002/hyp.70227","url":null,"abstract":"<div>\u0000 \u0000 <p>Inundation dynamics in lowland rivers are an outcome of a complex interaction between hydrologic and geomorphic factors. The co-occurrence of river flow and tidal surge in coastal regions further complicates these interactions. The extent to which these factors mediate inundation mechanisms in regulated lowland river reaches remains challenging and has been poorly understood. This study presents a novel framework that examines the combined effect of flood drivers (riverine and high tide) and geomorphic factors in determining the inundation mechanism along the Lower Tapi Basin (LTB) in western India through an integration of hydrological, tidal, hydrodynamic, and geomorphic datasets. Using variable infiltration capacity (VIC) and Hydrologic Engineering Center River Analysis System (2D HEC-RAS) with geomorphic characteristics of river channels, we explore how spatial inundation dynamics vary across different valley settings under different flood return periods. Our integrated modelling framework accurately simulates daily streamflow and flood inundation. Incorporation of multidisciplinary data through the integrated modelling framework has advanced our understanding of flood inundation dynamics in lowland rivers. We have further shown that the model uncertainty can be reduced by incorporating field data, bathymetric measurements and rule curve of reservoir operation in the model domain. Although this modelling framework has been developed on a specific lowland reaches of the Tapi River, it can be further extended to any lowland rivers in similar settings. Such multidisciplinary models will help to analyse river response to future projected climate and sea level change.</p>\u0000 </div>","PeriodicalId":13189,"journal":{"name":"Hydrological Processes","volume":"39 8","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144758531","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":"Evaluating Trends Using Total Impervious Cover as a Metric for Degree of Urbanisation","authors":"Laura Toran,&nbsp;Daniel J. Bain,&nbsp;Kristina Hopkins,&nbsp;Joel Moore,&nbsp;Emily O'Donnell","doi":"10.1002/hyp.70219","DOIUrl":"https://doi.org/10.1002/hyp.70219","url":null,"abstract":"<div>\u0000 \u0000 <p>Impervious cover (IC) is a common metric for assessing the degree of urbanisation in watersheds. However, there are different methods for determining IC, and use of IC correlation with urban watershed response to hydrologic and geochemical inputs can be strongly influenced by the end members (IC below 10% and above 40%). The resolution of the imagery (e.g., 1 m vs. 30 m) used to measure IC can influence the estimate of IC, with differences up to 15% observed between these two resolutions for 21 watersheds along the east coast of the United States. The differences are greatest in the middle range between 10% and 40% IC. When using IC for correlation with urban watershed responses such as discharge flashiness or median solute concentrations, fits with R² between 0.4 and 0.78 were obtained when including end members of IC from 0% to 50%. However, when trying to distinguish behaviour between urban watersheds that fall in the middle ranges of IC, these same parameters do not correlate well with IC. Correlations fail significance tests, can switch direction, and fall below an R² of 0.1 without the end members of very low or very high IC. Because of improved accuracy, the finest resolution is preferred when available, and mixing IC estimation methods should be avoided. Furthermore, using regressions that include end members may not contribute to differentiating how IC in the 10%–40% range impacts hydrologic and geochemical responses in urban watersheds. Understanding this middle range of IC is important for comparing urban and suburban watersheds or planning watershed development to minimise impacts.</p>\u0000 </div>","PeriodicalId":13189,"journal":{"name":"Hydrological Processes","volume":"39 8","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144758533","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":"Runoff Generation Mechanism of Small Forest Watersheds in Humid Regions of China Under Single Rainstorm Conditions","authors":"Fei Sheng,&nbsp;Yanyan Wang,&nbsp;Xiaofei Nie,&nbsp;Shiyu Liu,&nbsp;Haijin Zheng,&nbsp;Guangjie Chen,&nbsp;Changming Zhou,&nbsp;Tingxin Yi,&nbsp;Zhao Liu","doi":"10.1002/hyp.70230","DOIUrl":"https://doi.org/10.1002/hyp.70230","url":null,"abstract":"<div>\u0000 \u0000 <p>Runoff generation is the production of various runoff components and is a fundamental aspect of the hydrological cycle. Investigating the evolution mechanism and laws governing the formation process of watershed runoff from the perspective of runoff generation mechanisms has consistently been a focal point and challenge within the field of hydrology. However, the variation in the mechanisms of runoff generation under single rainstorm conditions has not been fully elucidated, particularly in the humid regions of China. In the present study, we focus on the Pengchongjian small watershed in Southeastern China, where the average annual precipitation is 1589 mm. Based on long-term hydrometeorological data, precipitation and runoff characteristics during single rainstorm conditions in the watershed were analysed. Alterations in the runoff generation mechanism were investigated in conjunction with the underlying surface characteristics. The findings revealed that in comparison to the baseline period (1983–2003), there was a 4.6% reduction in average rainfall amount and a 23.8% decrease in average runoff depth during the changing period (2004–2017). Additionally, it was observed that runoff depth exhibited more pronounced fluctuations, with a much higher variation coefficient than rainfall amount. Rainfall amount remained the primary factor influencing changes in runoff depth across different periods. However, its relative contribution decreased during the changing period, while the impact of non-precipitation factors increased during this period. There was an extremely significant upward trend in the normalised difference vegetation index of the watershed, and the forest coverage increased from 80% to 98%. The water conservation capacity of the main stands (Chinese fir forests) were higher than other forest types. Under the conditions of a single rainstorm, the predominant runoff generation pattern observed during various periods in the watershed was saturation-excess runoff, indicating a high soil infiltration rate. The proportion of the runoff generation patterns showed a significant change. During the baseline period, the proportion of saturation-excess runoff was 45.3%, which increased to 52.9% in the changing period. In contrast, the infiltration-excess runoff decreased from 36.8% to 32.9%. Additionally, the proportion of mixed runoff decreased from 17.9% to 14.2%. Meanwhile, the probability of interflow and groundwater flow generation increased, indicating an enhancement in the regulation and storage effects on watershed runoff. The findings of this research provide a scientific basis for mitigating and controlling flood disasters, optimising the allocation of water resources and evaluating the hydrological effects of the watersheds.</p>\u0000 </div>","PeriodicalId":13189,"journal":{"name":"Hydrological Processes","volume":"39 8","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144758499","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":"A Multiparameter and Multiscale Dataset to Study Sediments and Particle-Bound Pesticide Dynamics of Hydric Transfers in a Wine-Dominated Catchment","authors":"Jessica Pic,&nbsp;Fanny Courapied,&nbsp;Mathieu Fressard,&nbsp;Matthieu Masson,&nbsp;Christelle Margoum,&nbsp;Véronique Gouy,&nbsp;Nadia Carluer","doi":"10.1002/hyp.70223","DOIUrl":"https://doi.org/10.1002/hyp.70223","url":null,"abstract":"<p>Sediment transport plays a crucial role in water quality at the catchment scale. Yet, access to comprehensive datasets for research on sediment quantity and quality at different spatial scales remains limited. This paper introduces a comprehensive hydro-sedimentological dataset on the Ardières-Morcille catchment and scientific observatory (Beaujolais vineyard, France) available for the period 2020–2023. The observatory was monitored at three nested scales: the Saint-Joseph plot (0.28 ha), the Morcille sub-catchment (3.9 km²), and the Ardières catchment (143 km²). This dataset includes continuous monitoring of rainfall, water level, and turbidity at the three sites, from which discharge and suspended solids concentrations are derived. In addition, discontinuous yet integrated over time samples were collected for SPM grain size, major elements, and particle-bound pesticides analysis. This dataset has made it possible to assess orders of magnitude for sediment and particle-bound pesticides transfers and to interpret scale effects in time and space responsible for these transfers. We expect this dataset to be a valuable resource for the research community, supporting investigations into sediment transport processes, contaminant fluxes, and hydrological dynamics across multiple scales.</p>","PeriodicalId":13189,"journal":{"name":"Hydrological Processes","volume":"39 8","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/hyp.70223","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144740283","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":"The Role of Snowmelt on the Recharge Dynamics of a Vadose Alpine Karst","authors":"Eva Kaminsky,&nbsp;Barbara Funk,&nbsp;Adrian Flores-Orozco,&nbsp;Lukas Plan","doi":"10.1002/hyp.70212","DOIUrl":"https://doi.org/10.1002/hyp.70212","url":null,"abstract":"<p>In Alpine karst aquifers, snowmelt plays a crucial role in groundwater recharge, yet the processes governing water flow through the soil and epikarst into the vadose zone and to the phreatic zone remain poorly understood. This study aims at shedding some light on paths and mechanisms for infiltration, flow, and accumulation of snowmelt in comparison to rainwater in karstic systems. In particular, we present results for the upper vadose zone of the Hochschwab karst massif (Eastern Alps, Austria), a crucial water source for the capital of Vienna. We combined geophysical and hydrological methods to distinguish different infiltration processes. Data were collected at a cave (1896 m above sea level) over 3 weeks in March and April 2024, during which 12 infiltration events were observed—nine through diurnal cycles of snowmelt and three mixed with effective rain. Additionally, dry and wet conditions in the following summer were monitored to provide a seasonal comparison of infiltration dynamics. Monitoring included cave drip water at a V-notch weir (discharge, electrical conductivity, and temperature), soil moisture measurements at depths of 5–30 cm, and electrical resistivity tomography (ERT), utilising 96 electrodes between the cave ceiling and the surface. Measurements at the weir in the cave indicate higher flow rates during heavy precipitation than during snowmelt, while the ERT images show the highest saturation during snowmelt, especially in the bedrock. Hence, results show that snowmelt primarily leads to diffuse recharge, with an overall increase in the saturation of the epikarst and rock, while rain events demonstrate a quick recharge pattern. These findings emphasise the importance of snowmelt as a diffuse recharge source contributing to water storage and underline that the integration of multiple sensors is crucial for understanding the variability of recharge processes in Alpine karst systems under different meteorological conditions.</p>","PeriodicalId":13189,"journal":{"name":"Hydrological Processes","volume":"39 8","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/hyp.70212","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144725543","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":"Environmental Isotope Tracers Constrain River—Groundwater Interactions in a Stream Vulnerable to Mining Impacts","authors":"Angus G. Campbell,&nbsp;Ian Cartwright,&nbsp;Dioni I. Cendón,&nbsp;Matthew J. Currell","doi":"10.1002/hyp.70225","DOIUrl":"https://doi.org/10.1002/hyp.70225","url":null,"abstract":"<p>Protection of river flows and riparian ecosystems is reliant on a clear understanding of river–groundwater interactions. Uncertainty regarding these exchanges has hindered understanding of how Australia's largest coal mine will impact baseflow in the Carmichael River and discharge to the Doongmabulla Springs. Environmental isotope tracers (²H, ¹⁸O, ⁸⁷Sr/⁸⁶Sr, ³H and ³⁶Cl), major ions and groundwater levels helped to identify the sources of water and the extent of gaining and losing reaches in this poorly-gauged river system. Elevated δ¹⁸O values (−3.4‰–0.9‰) and ³H activities (1.8–1.9 TU) in the river indicate that surface runoff and shallow groundwater are the main water sources upstream of the Doongmabulla springs. Adjacent to the springs, lower ³H (0.33–0.91 TU) and depleted R³⁶Cl values (35.8 × 10⁻¹⁵–72.1 × 10⁻¹⁵) indicate that very old (residence time &gt; 500 ka) and intermediate (residence time &gt; 50 ka) groundwater sustains baseflow during the dry season. This same stretch of river periodically recharges underlying groundwater during major flooding events, as indicated by fluctuations in groundwater levels, Cl concentrations and measurable ³H (0.81 TU) in near-river groundwater. Downstream, within 1 km of the projected open-cut mine pit, increased ³H (0.64–0.70) and R³⁶Cl (75.69 × 10⁻¹⁵–78.07 × 10⁻¹⁵) in the river suggest there is no additional influx of older regional groundwater into the stream. Groundwater levels and Cl concentrations also suggest that river leakage is less significant near the mine than upstream. This conclusion contradicts the previous conceptualisation of the river, which assumed that river leakage would buffer mining-related groundwater drawdown along the river valley. Impacts to the Carmichael River and Doongmabulla springs have most likely been under-represented in numerical modelling and require re-evaluation. This study highlights the importance of river-groundwater exchanges in sustainable water management and presents a widely applicable methodology for characterising these exchanges in poorly-gauged rivers.</p>","PeriodicalId":13189,"journal":{"name":"Hydrological Processes","volume":"39 8","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/hyp.70225","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144740251","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":"Coupling SWAT+ and SWMM Models to Quantify Streamflow in Mixed Rural–Urban Watersheds","authors":"Hossein Ahmadi,&nbsp;Durelle Scott,&nbsp;David J. Sample","doi":"10.1002/hyp.70218","DOIUrl":"https://doi.org/10.1002/hyp.70218","url":null,"abstract":"<p>The fast-paced urbanisation has resulted in urban–rural transitional zones known as ‘sprawl’ that exhibit both urban and rural characteristics. This transformation significantly impacts water balance, leading to changes in surface runoff patterns in these mixed urban rural watersheds. The contrasting runoff generation patterns in urban and rural land uses pose significant challenges for accurately simulating runoff in these urban rural watersheds. To address these mixed watersheds, we developed an Integrated Environmental Modelling (IEM) approach to effectively represent complex hydrological behaviours in both urban and rural areas by integrating two widely used models: the Storm Water Management Model (SWMM) and the Soil and Water Assessment Tool Plus (SWAT+). The integrated model provides a means for coupling models, data storage, analysis, visualisation, and decision support systems. This framework links PYSWMM and PYSWAT+, offering automatic calibration of the integrated model in Python, which improves runoff simulation by considering distinct runoff generation patterns for each land use and the unique characteristics of each subcatchment. This study aims to improve our understanding of how runoff generation and streamflow behaviour vary across urban and rural areas by evaluating the performance of a coupled SWMM-SWAT+ model. A case study conducted in the urban–rural watershed of Stroubles Creek, Virginia, USA, demonstrated that the integrated model outperformed both standalone models in predicting streamflow during dry and wet periods. This study successfully shows that the SWMM-SWAT+ integration can effectively represent hydrological processes in mixed urban–rural watersheds, achieving higher accuracy than standalone models. The integrated model achieved higher accuracy than the standalone models, improving NSE from 0.51 (SWAT+) and 0.64 (SWMM) to 0.85, reducing RSR from 0.70 (SWAT+) and 0.60 (SWMM) to 0.39, and lowering PBIAS to 16.8%, compared to 37.87% (SWAT+) and −70.37% (SWMM), demonstrating its superior performance in streamflow simulation. These findings provide a practical and adaptable modelling framework for improving stormwater management, flood risk assessment, and sustainable water resources planning in transitional watersheds experiencing both urban and rural influences.</p>","PeriodicalId":13189,"journal":{"name":"Hydrological Processes","volume":"39 8","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/hyp.70218","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144716873","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":"Groundwater Flow Modelling of a Large-Scale Thick Vadose Zone Including Two Perched Aquifers, the Jerusalem Mountains","authors":"Shalom Ohad,&nbsp;Lev Ovadia,&nbsp;Livshitz Yakov,&nbsp;Gvirtzman Haim","doi":"10.1002/hyp.70216","DOIUrl":"https://doi.org/10.1002/hyp.70216","url":null,"abstract":"<p>In mountainous karst terrains, understanding flow dynamics within thick, stratified, and faulted vadose zones remains a major hydrological challenge. This study examines a dual-perched aquifer system on a folded limestone ridge near Jerusalem, Israel, where groundwater accumulates above low-permeability layers and transfers vertically along faults. Using a fully three-dimensional FEFLOW model, we simulate the coupled processes of infiltration, perching, and leakage, and identify the spatial fragmentation of perched reservoirs into hydraulically discrete spring catchments. Despite sparse borehole data, the model, calibrated with high-resolution spring hydrographs and daily precipitation, effectively captures key flow behaviours and quantifies storage–release dynamics across unsaturated strata. The structural controls and flow mechanisms discovered in this system, especially fault-mediated vertical coupling between perched and regional groundwater and the compartmentalisation of saturated zones, are likely common in other fractured karst uplands. Accordingly, the modelling approach developed here offers a transferable method for mapping recharge areas, managing distributed spring systems, and evaluating vulnerability to contamination. These insights are particularly relevant for hydrogeological assessments and groundwater management in densely populated, data-scarce mountainous regions increasingly affected by hydroclimatic variability.</p>","PeriodicalId":13189,"journal":{"name":"Hydrological Processes","volume":"39 8","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/hyp.70216","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144716541","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":"Source Identification and Apportionment of Abnormal High Boron Concentrations in Yellow River Basin, China","authors":"Lili Zhang,&nbsp;Wei Zhang","doi":"10.1002/hyp.70217","DOIUrl":"https://doi.org/10.1002/hyp.70217","url":null,"abstract":"<div>\u0000 \u0000 <p>Despite the well-documented anomalously high dissolved boron (B) concentrations in the Yellow River (YR), the precise sources and processes driving this enrichment remain unclear. To quantify and apportion B sources, we systematically analysed B concentrations across riverine, precipitation and wastewater samples within the YR basin. Complementary leaching experiments were performed on loess and suspended particulate matter (SPM) to decipher loess erosion impacts on river B dynamics. Forward mixing model results demonstrate that riverine B predominantly derives from silicate weathering (49.7%–81.3%) and evaporite dissolution (17.8%–42.3%), while contributions from carbonate weathering, rainfall and anthropogenic activities are negligible. Leaching experiments further confirmed that evaporite dissolution during loess runoff processes contributes 93.6% of the total evaporite-derived B flux in YR water. Meanwhile, we found that 89.2% of B in loess exists in silicate phases. Although the proportion of silicate weathering in loess is only 8.9%, the massive erosion of SPM (3.33 × 10⁸ t/year) elevates silicate weathering to the primary source of B in the YR. Furthermore, the YR's characteristically low discharge (28.3 km³/year) amplifies B concentrations through hydrological concentration effects. In 2012, the YR exported 2.21% of the global riverine B flux to the ocean, underscoring its disproportionate contribution to the global B cycle. This study clarifies the critical role of silicate weathering amplified by massive loess erosion in reshaping understanding of particulate-phase geochemical processes in global riverine B cycling.</p>\u0000 </div>","PeriodicalId":13189,"journal":{"name":"Hydrological Processes","volume":"39 8","pages":""},"PeriodicalIF":3.2,"publicationDate":"2025-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144716542","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}