Journal of Hydrology最新文献

{"title":"Unraveling the amplified role of urbanization on occurrence likelihood of precipitation extremes through nonstationary model in Huaihe River Basin, China","authors":"Pengcheng Xu ,&nbsp;Huanyu Yang ,&nbsp;Dong Wang ,&nbsp;Yuankun Wang ,&nbsp;Qiang Wang ,&nbsp;Xiaopei Ju ,&nbsp;Vijay P. Singh ,&nbsp;Miao Lu","doi":"10.1016/j.jhydrol.2025.133137","DOIUrl":"10.1016/j.jhydrol.2025.133137","url":null,"abstract":"<div><div>Under the combined influence of urbanization and climate change, the frequency and severity of precipitation extremes in the Huaihe River Basin of China (HRB) have intensified over recent decades. This underscores the importance of considering trend-induced nonstationarity in the risk analysis of rainfall extremes. This study utilized daily precipitation observations from 125 rural, suburban, and urban stations in the HRB to develop a nonstationary Generalized Extreme Value (GEV)-based model. The aim was to investigate the spatiotemporal evolution patterns of precipitation extremes (PEs) by integrating physical factors into distribution parameters as potential covariates. A risk amplification factor (RAF) was derived from comparing the recurrence levels between nonstationary and stationary GEV models to elucidate the amplified role of urbanization processes on PEs across different types of stations. Furthermore, for the stations suffering both the urbanization and climate change-induced nonstationarity, the singular impact of urbanization was isolated through the comparative analysis of RAF from <span><math><msub><mrow><mi>GEV</mi></mrow><mrow><mi>μ</mi><mo>/</mo><mi>σ</mi><mo>(</mo><mi>U</mi><mi>r</mi><mi>b</mi><mo>+</mo><mi>C</mi><mi>l</mi><mi>i</mi><mo>)</mo></mrow></msub></math></span> and <span><math><msub><mrow><mi>GEV</mi></mrow><mrow><mi>μ</mi><mo>/</mo><mi>σ</mi><mo>(</mo><mi>C</mi><mi>l</mi><mi>i</mi><mo>)</mo></mrow></msub></math></span>. The study found that all PEs exhibited increasing trends, with significantly increasing trends concentrated in the northern region of the HRB. Urbanization significantly influenced the trend-induced nonstationarity of <strong><em>Rx1day</em></strong> and <strong><em>Rx5day</em></strong> series, while its impact on the <strong><em>R95P</em></strong> and <strong><em>R25</em></strong> series was negligible in rural stations. Urbanization had the most substantial impact on <strong><em>Rx1day</em></strong> and <strong><em>Rx5day</em></strong>, with noticeable changes, while its influence on <strong><em>R25</em></strong> was minimal. Additionally, the changes in recurrence levels for suburban and urban areas were more pronounced than those in rural areas, particularly for <strong><em>Rx1day</em></strong>, <strong><em>Rx5day</em></strong>, and <strong><em>R95P</em></strong>.</div></div>","PeriodicalId":362,"journal":{"name":"Journal of Hydrology","volume":"657 ","pages":"Article 133137"},"PeriodicalIF":5.9,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143677758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 novel remote sensing-based calibration and validation method for distributed hydrological modelling in ungauged basins","authors":"Dongxue Zheng ,&nbsp;Wenbin Zhu ,&nbsp;Yan Han ,&nbsp;Aifeng Lv","doi":"10.1016/j.jhydrol.2025.133119","DOIUrl":"10.1016/j.jhydrol.2025.133119","url":null,"abstract":"<div><div>Distributed hydrological models allow spatial estimates of the main components of the water cycle. Consequently, they have been widely used in various applications. However, in-situ runoff observations are usually required to calibrate and validate these models, which largely limits their application in ungauged or poorly gauged basins. Satellite remote sensing (RS) provides temporally and spatially continuous data of water-related information, which makes it hold great potential to improve hydrological modeling. Against this background, we developed a novel RS-based calibration and validation method in this study for distributed hydrological modelling in ungauged basins. This method was demonstrated with the Soil and Water Assessment Tool (SWAT) model in Hala Lake basin, a closed watershed in Qinghai Province of China. The SWAT model was calibrated with RS-based terrestrial evapotranspiration (ET) products and validated with the lake water storage change (LWSC) retrieved from multi-mission satellite data and the basin water storage change retrieved from the Gravity Recovery and Climate Experiment (GRACE). The model calibration results demonstrated a Nash-Sutcliffe Efficiency (NSE) of 0.7 or higher in most sub-basins, proving the usability of RS products. The simulated ET results showed good agreement with two RS products, with an R² value of 0.8. Additionally, comparisons with GRACE data further validated the reliability of this method. This study demonstrates the significant potential in using multi-source RS satellite data for calibrating and validating models, as well as estimating monthly or annual runoff time series in data-scarce or ungauged basins.</div></div>","PeriodicalId":362,"journal":{"name":"Journal of Hydrology","volume":"658 ","pages":"Article 133119"},"PeriodicalIF":5.9,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143724344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 performance of precipitation products in characterizing the Indian summer monsoon rainfall (ISMR) using triple collocation","authors":"Sandipan Paul ,&nbsp;Hamed Alemohammad","doi":"10.1016/j.jhydrol.2025.133136","DOIUrl":"10.1016/j.jhydrol.2025.133136","url":null,"abstract":"<div><div>Precipitation datasets are crucial for understanding and studying the hydroclimatic processes. The advent of satellite observations and reanalysis has enabled to produce the precipitation observation at considerably fine spatial and temporal scales. However, the applicability and representativeness of these data products are still not definite, specifically over a vast topographic, ecologic, and climatic gradient and data-scarce region like India, where reliable (quality-controlled) and dense ground observations spread homogenously over space are inaccessible. Additionally, Indian Summer Monsoonal Rainfall (ISMR) produces ∼ 75 % of annual rainfall and determines the success of the agrarian Indian society and economy and subsequently, the sustenance of millions of people. In this context, reanalysis and satellite datasets could play a vital role by providing historical and near-real-time accurate precipitation estimates in understanding the climatic variability and forecasting the hydrometeorological extremes such as drought, urban floods. Hence, this study aims to evaluate four state-of-the-art precipitation data products over India by deploying the robust triple collocation (TC) technique during the principal rainy season (June to September). TC is a powerful formulation that allows the quantification of the error and agreement of the independent datasets without having the knowledge of reference observation. We further determine the order of suitability (rank) of examined data products based on the minimum error and maximum agreement estimated from TC. Furthermore, we derive the regional suitability of the datasets based on the Köppen–Gieger climate zones. Results suggest that: (1) reanalysis data products (IMDAA and ERA5-Land) outperform (rank one) other datasets in the wet tropical monsoon regions (west coastal plain and northeastern India), the highest rainfall receiving regions; (2) CHIRPS is the most suitable dataset in the transitional climatic conditions and facilitates the characterization of moderate to low-intensity ISMR events; (3) IMD is found to be suitable in peninsular India, where high gauge density is present.</div></div>","PeriodicalId":362,"journal":{"name":"Journal of Hydrology","volume":"657 ","pages":"Article 133136"},"PeriodicalIF":5.9,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143716285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Simulation of actual evaporation and its multi-time scale attribution analysis for major rivers in China","authors":"Jingyang Ji,&nbsp;Mengqi Sun,&nbsp;Guangxing Ji,&nbsp;Ling Li,&nbsp;Weiqiang Chen,&nbsp;Junchang Huang,&nbsp;Yulong Guo","doi":"10.1016/j.jhydrol.2025.133121","DOIUrl":"10.1016/j.jhydrol.2025.133121","url":null,"abstract":"<div><div>The water resources in various river basins across China are becoming increasingly severe due to the combined effects of climate change and human activities. Evaporation plays a crucial role in redistributing water resources within local areas. Analyzing the actual evapotranspiration (ETa) changes of six major rivers in China is essential for effective water resource management. This article first employed three mutation methods (the M−K analysis, the Pettitt analysis, and the Bernaola Galvan segmentation algorithm) to identify the runoff mutation years of six major rivers in China. Subsequently, the ABCD and DWBM hydrological models were utilized to estimate monthly, seasonal, and annual ETa scales. Then, the trend of ETa changes was analyzed using the Trend-Free Pre-Whitening Mann-Kendall (TFPW-MK) analysis method. Finally, a multi-time scale Budyko model was constructed to quantitatively assess the impacts of climate change and human activities on changes in ETa. The results indicated that: (1) The Nash coefficient and KGE coefficient for the ABCD and DWBM models during both the base and mutation periods of each watershed were generally above 0.7, with most values exceeding 0.8, signifying a high level of accuracy in the simulation results. (2) On a monthly scale, climate change was the primary factor influencing ETa changes in the Upper reaches of the Yangtze River Basin (UYRB) from January to May, the Middle and Upper reaches of the Songhua River Basin (MUSRB) from January to March, the Upper reaches of the Huaihe River Basin (UHRB) from January to June, and the Upper reaches of the Pearl River Basin (UPRB) from January to December. Human activities were the predominant driving force in the monthly ETa changes in the Source Regions of the Yellow River Basin (SRYRB). Except for April and May, ETa of the Source Regions of the Lancang River Basin (SRLRB) in other months were predominantly affected by human activities. (3) On a seasonal scale, climate change played a leading role on the spring and winter ETa changes in UYRB and the seasonal ETa changes in SRYRB were primarily driven by human activities. And the seasonal ETa changes in UPRB were predominantly affected by climate change. With the exception of winter, the ETa changes of MUSRB in other seasons were mainly attributed to human activities. In UHRB, except for autumn, climate change was the primary driving force in ETa changes in other seasons. In SRLRB, except for spring, human activities exhibited a dominant effect on ETa changes in other seasons. (4) On an annual scale, the impacts of climate change and human activities on annual ETa changes in UYRB were approximately equal. The annual ETa changes in SRYRB, MUSRB, and SRLRB were predominantly caused by human activities. In UHRB and UPRB, climate change played a leading role in annual ETa changes.</div></div>","PeriodicalId":362,"journal":{"name":"Journal of Hydrology","volume":"657 ","pages":"Article 133121"},"PeriodicalIF":5.9,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143677805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Hydrodynamic characteristics in pools with leafless vegetation under ice-covered flow conditions − an experimental study and numerical simulation","authors":"Guowei Li,&nbsp;Jueyi Sui,&nbsp;Sanaz Sediqi","doi":"10.1016/j.jhydrol.2025.133135","DOIUrl":"10.1016/j.jhydrol.2025.133135","url":null,"abstract":"<div><div>This study investigates the impact of submerged rigid leafless vegetation on the hydrodynamic characteristics in pools and explores the turbulent kinetic energy profile of flow under ice-covered flow conditions. To investigate the effects of leafless vegetation on flow velocity, turbulent kinetic energy, and secondary flow variations, laboratory experiments have been conducted in a large-scale outdoor flume considering different water surface cover conditions, submergence heights of vegetation, pool features, and hydraulic conditions. The Re-Normalization Group (RNG) k-ε turbulence model, implemented in Flow-3D (CFD) software, has been used to simulate fluid dynamics in the channel with pools. The results indicate that vegetation transforms the vertical distribution of main flow velocity within the vegetated zone from a logarithmic shape to a quasi-S shape. Compared to the non-vegetated conditions, vegetation in the pool bed induces notable disturbances in lateral velocity, fostering the formation of secondary currents across the pool cross-sections. The velocity decreases within the vegetated zone in the pool. Still, it increases as the height of vegetation rises, suggesting that vegetation significantly obstructs flow in the pool and creates a slow flow zone, potentially enhancing habitat suitability for aquatic organisms near the pool bottom. Turbulent kinetic energy exhibits significant changes near the vegetation tops, with the maximum values observed at the vegetation-water interface under open channel flow conditions forming a mirrored “C” shape, indicating substantial energy exchange at this boundary. In the presence of an ice cover on the water surface, the turbulent kinetic energy demonstrates a sharp increase near the surface. As inflow increases, the turbulent kinetic energy along the water depth in the pool increases. This study demonstrates that Flow-3D software effectively simulates the impact of leafless vegetation on the hydrodynamic characteristics of channels with pools, providing valuable insights for flood control, riverbank restoration, and ecological protection efforts.</div></div>","PeriodicalId":362,"journal":{"name":"Journal of Hydrology","volume":"657 ","pages":"Article 133135"},"PeriodicalIF":5.9,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143716321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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":"Meso-Structural evolution and erosion mechanisms of soil-structure interface explored via In-Situ CT scanning","authors":"Zihan Zhang ,&nbsp;Changdong Li ,&nbsp;Yang Ye","doi":"10.1016/j.jhydrol.2025.133128","DOIUrl":"10.1016/j.jhydrol.2025.133128","url":null,"abstract":"<div><div>Compared with the surrounding soil matrix, the soil-structure interface (SSI) serves as a preferential seepage pathway, exhibiting heightened erosion characteristics. Despite its importance, the mechanisms underlying seepage and the <em>meso</em>-structural changes during SSI erosion are inadequately understood. In this study, a miniature triaxial permeameter is integrated with in-situ computed tomography (CT) scanning to investigate the erosion mechanisms and critical hydraulic criterion across various confining pressures, fine-grain contents, and interface roughnesses. We analyse <em>meso</em>-structural evolution through pore geometric, morphological, and topological parameters, providing direct visualization and quantification of particle erosion and clogging. Our findings reveal three distinct erosion patterns influenced by the confining pressure and fine-grain content. Notably, increases in hydraulic conductivity correlate with increased pore size, fractal dimension, and coordination number, alongside reductions in the sphericity index and aspect ratio of pore throats. This study provides mesoscopic structural evidence, obtained through in-situ CT scanning, that demonstrates that temporary clogging significant contributes to fluctuations in hydraulic conductivity. Furthermore, we propose a progressive four-stage mechanistic model with governing equations for SSI seepage erosion failure, including particle detachment, fluidized particle transport, localized temporary clogging, and dominant seepage channel formation until failure.</div></div>","PeriodicalId":362,"journal":{"name":"Journal of Hydrology","volume":"658 ","pages":"Article 133128"},"PeriodicalIF":5.9,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143724127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 agent-based modeling of rescue operations for the evaluation of short-range flash flood forecasts","authors":"Maryse Charpentier-Noyer ,&nbsp;Olivier Payrastre ,&nbsp;Eric Gaume ,&nbsp;Pierre Nicolle ,&nbsp;François Bouttier ,&nbsp;Axelle Fleury ,&nbsp;Hugo Marchal","doi":"10.1016/j.jhydrol.2025.133048","DOIUrl":"10.1016/j.jhydrol.2025.133048","url":null,"abstract":"<div><div>This paper presents the application of an agent based model to evaluate how short-range flood forecasts may improve the emergency management of a severe flash-flood event. The considered flood hit several inhabited areas in the Aude River basin, south-eastern France, in October 2018. Particularly, the capacity to trigger timely rescue operations at the right places is evaluated and compared, depending on the input information used in the emergency decision process: from rainfall observations up to flash flood impacts forecasts at the river reach scale. To achieve this evaluation, the field operations of firemen rescue teams are simulated in an agent-based model, which provides a detailed description of the complexity of the emergency situation: location and timing of flood damages, limited number of rescue teams, traveling times, decisions taken under uncertainty about the future evolution of the event. The flash flood impacts forecasts involved in the decisions are obtained using (i) three different short range (0-6h) quantitative precipitation forecast (QPF) products or a naive zero future rainfall scenario, (ii) a distributed hydrological model and (iii) a simple impacts model evaluating the number of flooded buildings. The presented results confirm that the efficiency of the rescue operations is generally improved when using QPFs as input of the decision chain, due to the increased anticipation. But they also illustrate how this added value can be highly altered by the combined effects of forecast uncertainties (false alarms) and limited available rescue means. In a fictive situation where rescue means are extremely limited, using a zero future rainfall scenario proves to be almost as efficient as using QPFs.</div></div>","PeriodicalId":362,"journal":{"name":"Journal of Hydrology","volume":"657 ","pages":"Article 133048"},"PeriodicalIF":5.9,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143716288","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 transportation and driven mechanisms of per- and polyfluoroalkyl substances (PFAS) in various saline vadose environments","authors":"Yue Lan ,&nbsp;Xingchun Jiao ,&nbsp;Huifeng Yang ,&nbsp;Bo Song ,&nbsp;Litang Hu ,&nbsp;Li Wang ,&nbsp;Yuhan Gao","doi":"10.1016/j.jhydrol.2025.133131","DOIUrl":"10.1016/j.jhydrol.2025.133131","url":null,"abstract":"<div><div>The ubiquitous presence of per- and polyfluoroalkyl substances (PFAS) is causing significant concern due to their hazardous and long-lasting properties. Large amounts of PFAS have been preserved in the vadose zone after years of accumulation from both direct and indirect sources, possibly posing a threat to the groundwater. Extreme weather events, such as heavy rainfall and severe drought, have become more often in recent years as a result of global climate change, causing fluctuations in the groundwater table and changes in soil structure and function. A primary outcome is soil salinization, which is associated with substantial uncertainty regarding the transport and fate of PFAS. Salinization leads to soil compaction, reduced porosity, diminished aeration, and impaired permeability, hence increasing solid-phase PFAS adsorption. Salt ions can enhance the hydrophobic effect of PFAS by affecting electrostatic interactions, bridge bonding, and competitive adsorption between PFAS and the medium surface. Furthermore, as the concentration of salt ions increases, the adsorption of PFAS at the air–water interface strengthens. The paper investigates PFAS deposition, transport, and driving mechanisms in several natural salty habitats, such as coastal zones, saline agricultural land, and salt lake regions. A summary of numerical models suitable for describing PFAS behavior under normal salinity settings is provided. The current research gaps and prospective research dimensions are examined. This review improves our understanding of PFAS behavioral characteristics in natural saline environments. It would provide both theoretical and practical recommendations for reducing PFAS pollution in saline soil and groundwater environments.</div></div>","PeriodicalId":362,"journal":{"name":"Journal of Hydrology","volume":"658 ","pages":"Article 133131"},"PeriodicalIF":5.9,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143739047","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimizing storage-based reservoir operation schemes for enhanced large-scale hydrological modeling: A comprehensive sensitivity analysis","authors":"Li Tang,&nbsp;Guoqing Liu,&nbsp;Xiaohui Sun,&nbsp;Ping Liu","doi":"10.1016/j.jhydrol.2025.133173","DOIUrl":"10.1016/j.jhydrol.2025.133173","url":null,"abstract":"<div><div>Accurate reservoir operation modeling is essential for hydrological simulations and climate impact assessments. This study evaluated three storage-based reservoir operation models across 289 global reservoirs using observed inflow, outflow, and storage data. Under default parameterizations, model performance varied, with median Nash-Sutcliffe Efficiency (NSE) values for outflow ranging from 0.30 to 0.38. A model incorporating target storage constraints consistently outperformed the others across most reservoir types and sizes. A Sobol-based sensitivity analysis, using the bounded NSE index (C2M) on outflows, identified distinct parameter influences. Two models exhibited balanced sensitivity to multiple parameters, whereas the third was primarily influenced by a single parameter related to peak flow management. Parameter optimization significantly improved outflow simulations, with median C2M increases of 29 %, 26 %, and 25 % across the three models. These improvements were particularly pronounced in regions with poor default performance, such as the eastern USA. Statistical analyses underscored the importance of calibration, as optimized models achieved C2M values above 0.6 for over 60 % of reservoirs. This study systematically evaluated the performance of storage-based reservoir operation models, parameter sensitivities, and the potential for improving reservoir representation in hydrological models. Enhanced reservoir simulations support the calibration and refinement of large-scale river models by identifying key parameters for reservoir modules.</div></div>","PeriodicalId":362,"journal":{"name":"Journal of Hydrology","volume":"657 ","pages":"Article 133173"},"PeriodicalIF":5.9,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143682777","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Source identification of dissolved inorganic phosphorus in a typical P-contaminated river: New constraints from multiple isotopes (inorganic C, Sr, Ca)","authors":"Zhanyao Shi ,&nbsp;Yao Du ,&nbsp;Hongni Liu ,&nbsp;Xianjun Xie","doi":"10.1016/j.jhydrol.2025.133138","DOIUrl":"10.1016/j.jhydrol.2025.133138","url":null,"abstract":"<div><div>The sources of dissolved inorganic phosphorus (DIP) in rivers are complex and diverse due to the continuously changing environment, presenting a significant hurdle in precisely identifying the sources within river systems. This study jointly used multiple isotopes (inorganic C, Sr, Ca) for the first time to determine the sources and detailed transformation of DIP in a typical P-contaminated river in the central Yangtze. The results of this work showed that the aqueous chemistry of the river in the phosphorite area was mainly affected by the weathering of dolomite by carbonic acid and sulfuric acid, as well as the weathering of silicate minerals by sulfuric acid. Within the anthropogenic area, the river water chemistry was mainly shaped by the weathering of limestone and dolomite by carbonic acid, along with silicate minerals weathering induced by carbonic acid. The changes in ⁸⁷Sr/⁸⁶Sr indicated that the DIP content in river water mainly came from the weathering of phosphate-containing dolomite and the discharge of domestic sewage in the phosphorite area. More negative <em>δ</em>¹³C_DIC values were accompanied by higher concentrations of ions related to human activities and DIP, indicating that the DIP content in river water primarily originated from agricultural cultivation and domestic sewage discharge in the anthropogenic area. Additionally, the secondary mineral precipitation fractionated Ca isotopes in the phosphorite area, adsorbing DIP in the river, and resulting in reduced DIP concentrations. Moreover, the decrease in <em>δ</em>¹³C_DIC values was accompanied by an increase in HCO₃⁻ and DIP concentrations, indicating that the degradation of organic phosphorus within the river bodies in the anthropogenic area contributed to an increase in DIP concentration to a specific extent. This study’s findings offer a new methodology and perspective regarding the sources of DIP in river ecosystems.</div></div>","PeriodicalId":362,"journal":{"name":"Journal of Hydrology","volume":"657 ","pages":"Article 133138"},"PeriodicalIF":5.9,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143683130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}