Journal of Hydrology最新文献

{"title":"Groundwater flow and salinity dynamics in swash Zones: Combined effects of Evaporation, Waves, and geologic heterogeneity","authors":"Xiaolong Geng ,&nbsp;Holly A. Michael ,&nbsp;James W. Heiss ,&nbsp;Michel C. Boufadel ,&nbsp;Hailong Li ,&nbsp;Yan Zhang","doi":"10.1016/j.jhydrol.2024.132322","DOIUrl":"10.1016/j.jhydrol.2024.132322","url":null,"abstract":"<div><div>This study employs groundwater simulations to examine the combined effects of waves, evaporation, and geologic heterogeneity on the flow and salinity dynamics in a shallow beach environment. The modeling results reveal that wave motion generates a saline plume beneath the swash zone, with hypersalinity near the surface triggered by evaporation. Geologic heterogeneity critically controls the temporal and spatial patterns of evaporation, moisture content, and salinity in the swash zone. Heterogeneous capillarity creates localized moisture hotspots within the unsaturated zone, which support enhanced evaporation and therefore facilitate salt accumulation at the surface, even when the overall moisture conditions along the swash zone are not conducive to high rates of evaporation. The formation of capillary barriers allows these moisture hotspots to persist over tidal cycles, leading to the retention of saltwater pockets within heterogeneous unsaturated finer sediments. As the swash zone recedes and evaporation intensifies, salt begins to accumulate near the beach surface. The moisture hotspots create preferential pathways that facilitate the penetration of hypersaline water into deeper, saturated sediments. In contrast, within the saturated zone, groundwater flow and salt transport are predominantly driven by preferential flow within high-permeability coarse sediments where capillarity is relatively low. Such transport and capillary mechanisms are crucial for a better understanding of coastal groundwater flow, interstitial habitats, biogeochemical conditions, and consequent nutrient cycling and contaminant transport in coastal zones. This highlights the necessity of considering integrated coastal physical drivers when investigating flow and transport processes in coastal swash zones.</div></div>","PeriodicalId":362,"journal":{"name":"Journal of Hydrology","volume":"646 ","pages":"Article 132322"},"PeriodicalIF":5.9,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142664266","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":"Assessing the efficacy of Permeable Interlocking Concrete Pavers (PICP) in managing stormwater runoff under climate change and land use scenarios","authors":"Yasir Abduljaleel ,&nbsp;Sylvester Richard Chikabvumbwa ,&nbsp;Faraz Ul Haq","doi":"10.1016/j.jhydrol.2024.132329","DOIUrl":"10.1016/j.jhydrol.2024.132329","url":null,"abstract":"<div><div>The study examines Permeable Interlocking Concrete Pavers (PICP) systems in urban and suburban areas facing intensified stormwater challenges due to climate change and evolving land use patterns. It investigates various factors affecting PICP performance, including soil, topography, vegetation, and rainfall intensity, using advanced modeling techniques. The study’s methodology integrates Personal Computer Storm Water Management Model (PCSWMM) model and Python scripting, utilizing historical and projected data to guide resilient PICP designs. Climate projections from 2030 to 2080 show a significant increase in stormwater runoff due to urbanization, emphasizing flood risk concerns. The findings indicated a substantial 43 % increase in runoff for the City of Renton-Cedar watershed in Washington from 2030 to 2069. Without PICP implementation, a notable 20.3 % surge in total runoff volume is anticipated. This highlights the crucial role of PICP and sustainable urban planning in mitigating urbanization’s impact on hydrology. With PICP implementation, the results show that the total runoff may reduce to a range within 24 %–75 % for the three land use scenarios (15 %, 25 % and 35 %). The results also exhibited a significant (P &lt; 0.05) and strong (R² &gt; 0.8) direct relationship between clogging and PICP systems. Overall, the research underscores PICP systems’ effectiveness in managing stormwater, emphasizing their importance in diverse urban settings, and advocating for green infrastructure adoption to enhance urban resilience amidst changing environmental dynamics.</div></div>","PeriodicalId":362,"journal":{"name":"Journal of Hydrology","volume":"646 ","pages":"Article 132329"},"PeriodicalIF":5.9,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142664265","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":"Disentangling the contributions of water vapor, albedo and evapotranspiration variations to the temperature effect of vegetation greening over the Arctic","authors":"Linfei Yu ,&nbsp;Guoyong Leng ,&nbsp;Lei Yao ,&nbsp;Chenxi Lu ,&nbsp;Siqi Han ,&nbsp;Shunxiang Fan","doi":"10.1016/j.jhydrol.2024.132331","DOIUrl":"10.1016/j.jhydrol.2024.132331","url":null,"abstract":"<div><div>Vegetation greening is observed over the Arctic, and its feedback to Arctic amplification has attracted increasing attention. Previous studies have primarily focused on the temperature effect of a single environmental variable (e.g., albedo), while the separate contributions of land surface albedo, evapotranspiration (ET) and water vapor remain underexamined. In this study, we develop knowledge-based data-driven models (i.e., path analysis and machine learning) to estimate the temperature effect of vegetation greening and quantify the separate contributions of albedo, ET and water vapor in July and August from 1982 to 2015. The results show a wide range of temperature sensitivity to the NDVI (Normalized Difference Vegetation Index), and vegetation greening has led to Arctic warming of 0.76 °C, 0.68 °C, 0.83 °C in July and August and the average of the two months, respectively. Path analysis suggested that vegetation greening affects Arctic air temperature mainly by regulating albedo and water vapor. In July, changes in water vapor contributed the most to the temperature effect of vegetation greening with a contribution of 0.25 ± 0.08 °C, while in August, changes in albedo and water vapor had similar effects with a contribution of 0.21 ± 0.08 °C. In contrast, changes in ET have generated a negligible cooling effect due to small changes in ET. Further analysis shows similar positive contributions of albedo and water vapor in barren, graminoid tundra, prostrate-shrub tundra and erect-shrub, with contributions ranging from 0.18 ± 0.05°C to 0.30 ± 0.11°C, while changes in water vapor dominate vegetation’s temperature effect in wetlands, with contributions ranging from 0.26 ± 0.11°C to 0.32 ± 0.16°C. This study emphasizes the importance of considering multiple driving factors to assess the temperature effect of vegetation greening in a consistent framework and highlights the critical role of water vapor change in addition to the widely examined albedo in explaining Arctic warming.</div></div>","PeriodicalId":362,"journal":{"name":"Journal of Hydrology","volume":"646 ","pages":"Article 132331"},"PeriodicalIF":5.9,"publicationDate":"2024-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142664267","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 Multi-Objective Simulation-Optimization framework for water resources management in canal-well conjunctive irrigation area based on nexus perspective","authors":"Jianzhe Hou ,&nbsp;Yanan Jiang ,&nbsp;Tingting Wei ,&nbsp;Zijun Wang ,&nbsp;Xiaojun Wang","doi":"10.1016/j.jhydrol.2024.132308","DOIUrl":"10.1016/j.jhydrol.2024.132308","url":null,"abstract":"<div><div>Water scarcity drives the nexus of water-food-energy-ecosystem (WFEE) in arid and semi-arid agricultural irrigation areas, while the impacts of different irrigation strategies can propagate from water sector to other sectors through groundwater system. In this work, a Multi-Objective Simulation Optimization (MOSO) framework that couples the numerical groundwater model (MODFLOW) with the multi-objective optimization model (NSGA-III) is proposed to coordinate multiple resource systems with conflicting interests based on nexus perspective by reasonably allocating irrigation water resources from surface water diversion and groundwater abstraction. The management objectives include maximization of water use efficiency and food economic efficiency, as well as minimization of energy consumption efficiency and the impact of irrigation on ecosystem subject to groundwater levels, surface water supply and irrigation water demand. To demonstrate the feasibility of the MOSO framework, a water resources management problem in typical canal-well irrigation area − Baojixia Irrigation Area (BIA), located in Shaanxi province in northwest China, has been solved. The major findings are: (a) for every 10 % increase in the proportion of groundwater usage across the total irrigation area, water use efficiency decreases by 0.05 kg/m³, energy consumption efficiency increases by 900 CNY/ha, the ecosystem impact index decreases by 0.1, and food economic efficiency remains unchanged; (b) the four-dimensional Pareto-optimal solutions comprehensively consider all the impacts of the WFEE nexus system, avoiding decision shortsightedness caused by a low-dimensional perspective; (c) spatial differences in irrigation strategies across different zones are primarily influenced by crop structure, hydrogeological parameters and surface elevation, while temporal variations are mainly concentrated during the maize irrigation period. The framework based on water resources management and groundwater dynamics can efficiently evaluate trade-offs and synergies among nexus sectors, providing far-sighted suggestions for policy makers to improve resource-use efficiency, while mitigating the impact of irrigation on ecosystem.</div></div>","PeriodicalId":362,"journal":{"name":"Journal of Hydrology","volume":"646 ","pages":"Article 132308"},"PeriodicalIF":5.9,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142664216","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":"The role of mobile-immobile sorbents on flow and colloid-facilitated contaminant transport through porous media: Two-dimensional modeling","authors":"Akhilesh Paswan ,&nbsp;Pramod Kumar Sharma","doi":"10.1016/j.jhydrol.2024.132307","DOIUrl":"10.1016/j.jhydrol.2024.132307","url":null,"abstract":"<div><div>A mathematical model based on conceptual equilibrium has been devised to study the role of mobile-immobile sorbents on colloid-facilitated contaminant transport through a two-dimensional, saturated, and homogeneous groundwater system with transient flow conditions. The primary drawback of the kinetic model arises from its inability to handle the large number of parameters involved in multi-dimensional regions at bigger scales when several transport processes and transient flow conditions are included. In order to prevent model complexity, the current study is the first attempt to investigate the equilibrium approach with transient flow conditions in a two-dimensional domain. Conventionally, colloids enhance the contaminant transport by adsorbing contaminants through multiple sorption reactions. However, it was noticed that even in the presence of colloids (<span><math><mrow><msub><mi>C</mi><mi>c</mi></msub><mo>=</mo><mn>100</mn><mspace></mspace><mi>m</mi><mi>g</mi><mo>/</mo><mi>l</mi></mrow></math></span>), BTCs get attenuated due to an increase in <span><math><mrow><msub><mi>k</mi><mn>3</mn></msub></mrow></math></span>, which indicates a stronger affinity of pollutants with the static solid matrix. Therefore, the present study suggests that the mere existence of colloids may not guarantee enhanced contaminant movement. A contaminant plume with 50 mg/l of colloids travels 2 m ahead of the contaminant without colloids, and this distance increases to 4.7 m for 100 mg/l colloids. Therefore, colloids can either be favorable in the case of contaminated aquifer rehabilitation or adverse in the event of groundwater contamination spread.</div></div>","PeriodicalId":362,"journal":{"name":"Journal of Hydrology","volume":"646 ","pages":"Article 132307"},"PeriodicalIF":5.9,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142664214","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":"Impact of Three Gorges Dam construction on spatiotemporal variations in the hydrodynamic regime of Poyang Lake (China)","authors":"Xiyan Yang,&nbsp;Shanghong Zhang,&nbsp;Caihong Tang,&nbsp;Chuansen Wu,&nbsp;Yinxin Ge","doi":"10.1016/j.jhydrol.2024.132302","DOIUrl":"10.1016/j.jhydrol.2024.132302","url":null,"abstract":"<div><div>As an important large-scale river-connected lake in the middle–lower reaches of the Yangtze River, Poyang Lake has complex interactions with the main stream of the river. The full operation of the Three Gorges Dam (TGD) on the main stream of the Yangtze River has caused substantial changes in the relationship between the river and the lake, and the hydrological and hydrodynamic regime of Poyang Lake have also shown obvious variations in response. This study constructed a 2D hydrodynamic model of Poyang Lake based on GPU acceleration to realize a long-term simulation of the water flow evolution of Poyang Lake. By comparing the differences in water level at Hukou station between 20-year periods before and after TGD construction, the impact of TGD construction on Poyang Lake was characterized. Results showed that in comparison with the values for the pre-dam period, the water level of Poyang Lake decreased by 0.4–2.0 m and the flow velocity increased by 0.01–0.04 m/s in the post-dam period, and both showed a trend of reduction spatially from the north toward the south. Additionally, the inundation area of the lake decreased by 9 %, the 10-m characteristic water level at Xingzi station advanced by 27 days, the duration of low water extended by 37 days, and in typical dry, normal, and wet years, the time of occurrence of low water advanced. Moreover, TGD construction has aggravated the conditions of Poyang Lake in the dry season. The findings of this study are of great importance in relation to refining the spatiotemporal distribution characteristics of habitats, and supporting further investigation of the changes in the aquatic ecosystem of Poyang Lake under TGD regulation.</div></div>","PeriodicalId":362,"journal":{"name":"Journal of Hydrology","volume":"646 ","pages":"Article 132302"},"PeriodicalIF":5.9,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142664268","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":"Modelling of the trade-off between the deep soil moisture and vegetation restoration in the hilly area of the Loess Plateau, China","authors":"Yuqing Chang ,&nbsp;Lei Han ,&nbsp;Rui Chen ,&nbsp;Zhao Liu ,&nbsp;Yabei Li ,&nbsp;Zilin Zhao ,&nbsp;Yifeng Gao ,&nbsp;Meili Yang ,&nbsp;Xinxin Cao ,&nbsp;Zheyuan Miao ,&nbsp;Hongliang Kang","doi":"10.1016/j.jhydrol.2024.132274","DOIUrl":"10.1016/j.jhydrol.2024.132274","url":null,"abstract":"<div><div>Excessive depletion of soil moisture by artificial forests in the vegetation restoration areas of the Loess Plateau has attracted widespread attention. To assess potential risks of soil moisture deficit, we needed on-site vegetation and soil sampling data, as well as UAV images from the Chaigou Watershed for three-dimensional analysis, combining both sampling and raster data. Three-dimensional surfaces for assessment of trade-off were established innovatively by the local regression and interpolation methods. The results indicated that soil moisture benefits at 20–40 cm depth are lower than at 0–20 cm due to infiltration and surface disturbance. In some areas of the Chaigou Watershed, grass and shrub-grass vegetation are facing risks of soil moisture deficit based on trade-off values (RSMD) and multiparameter evaluations. Analysis of deep soil water content variability revealed the moisture decreases significantly with the deepening of the soil layer in some plots. R (Richness), H (Shannon’s Diversity), Margalef, COHESION, and CONTAG were applicable in interpolation and fitted with the local regression model (R² &gt; 0.6) corresponding to the trade-off, but SPLIT was proven to be inapplicable in this study area. The zero trade-off inflection points were 6 %–8 %, while the trend inflection points were 7.5 %–9 % for soil moisture and vegetation indices of vegetation and landscape in typical sampling sites of the Chaigou Watershed. Three-dimensional fitting model is more comprehensive and effective in assessing deep soil moisture conditions and grass plots on shady slopes generally had the best trade-off status in this region.</div></div>","PeriodicalId":362,"journal":{"name":"Journal of Hydrology","volume":"645 ","pages":"Article 132274"},"PeriodicalIF":5.9,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142663525","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":"National estimation of regulated water storage of reservoirs in China","authors":"Chunyu Yuan ,&nbsp;Pengfei Zhan ,&nbsp;Chenyu Fan ,&nbsp;Tan Chen ,&nbsp;Fanxuan Zeng ,&nbsp;Kai Liu ,&nbsp;Linghong Ke ,&nbsp;Chunqiao Song","doi":"10.1016/j.jhydrol.2024.132296","DOIUrl":"10.1016/j.jhydrol.2024.132296","url":null,"abstract":"<div><div>The need for man-made reservoirs has increased with the growing population and changing climate. One of the most intensive human-induced alterations of the hydrological cycle is the regulated water storage in reservoirs, however, its quantification in large-scale reservoirs in China is inadequate. The lack of such information limits the rational management and utilization of water resources in reservoirs. To address this issue, we first mapped the dense time series of high-resolution (10 m) water inundation areas based on Sentinel-2 image scenes from 2017 to 2022 and then composed the annual surface water frequency (WF) maps of Chinese reservoirs. We calculated the water area of each reservoir at different WFs and estimated the corresponding water storage using our previously developed machine learning model. The water storage difference between the maximum water area (WF ≥ 5 %) and year-long (WF ≥ 75 %) water area was assumed as the regulated water storage of reservoirs. Results show that the multiyear-averaged water storage of all Chinese reservoirs at the maximum water area is estimated at 784.60 km³ from 2017 to 2022, and the water storage at the year-long water area is approximately 318.86 km³. The average annual regulated water storage of the reservoirs is estimated at 465.74 km³, accounting for 43.72 % of the total designed water storage of reservoirs in China. Among the basins, the Yangtze River Basin and Pearl River Basin have the highest average annual regulated water storage of 152.52 and 84.94 km³, respectively. The basins with larger irrigation areas and higher populations tend to have higher reservoir regulated water storage. The normalized water storage (NS) shows high spatial variations across reservoirs in different basins, with most basins in the south having higher NS than those in the north.</div></div>","PeriodicalId":362,"journal":{"name":"Journal of Hydrology","volume":"645 ","pages":"Article 132296"},"PeriodicalIF":5.9,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142663680","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":"Hydrogeochemical processes of As enrichment and migration in the Surface’s critical zone of the Shiquan River basin in the western Qinghai–Tibet Plateau","authors":"Qingshan Li ,&nbsp;Xiaobing Kang ,&nbsp;Mo Xu ,&nbsp;Ke Li ,&nbsp;Kun Zhu","doi":"10.1016/j.jhydrol.2024.132305","DOIUrl":"10.1016/j.jhydrol.2024.132305","url":null,"abstract":"<div><div>The enrichment of As in the western Qinghai–Tibet Plateau and its surrounding basins has been widely reported. However, the spatial distribution of arsenic content in the Surface’s Critical Zone (SCZ) of the Shiquan River Basin in the western Qinghai–Tibet Plateau is poorly understood, as is the mechanisms through which water–rock interactions and surface water-groundwater interactions influence arsenic enrichment and migration. In this study, the contents of arsenic and other chemical components in surface water, groundwater, sediment, soil, and rock in the Shiquan River Basin were analyzed to investigate the hydrogeochemical process of arsenic migration. The results indicate that the concentration ratios of HCO₃^–/(Na⁺+K⁺), Ca²⁺/(Na⁺+K⁺), Na⁺/(Na⁺+Ca²⁺) and δ¹⁸O in the surface water of the Shiquan River Basin vary along the runoff path. Carbonate and silicate weathering dominate the middle and upper reaches, while evaporite dissolution gradually increases in the lower reaches. Arsenic is enriched in rocks, soil, surface water, and groundwater in the SCZ, with slightly higher concentrations found in the surface water, sediment, and soil in the middle reaches than in the upper and lower reaches. This spatial distribution suggested that the hydrogeochemical processes along the runoff path controlled the distribution of As in the basin. Water–rock interactions and hot spring discharge of arsenic-bearing minerals contributed to its enrichment in the basin, while adsorption by riverbed sediment led to the gradual decay of dissolved arsenic. The underlying aquifer (alluvial-diluvial layer) recharged by surface water is the main source of high arsenic concentration in groundwater. The findings of this study can serve as a reference for studying arsenic in similar high-arsenic basins worldwide.</div></div>","PeriodicalId":362,"journal":{"name":"Journal of Hydrology","volume":"646 ","pages":"Article 132305"},"PeriodicalIF":5.9,"publicationDate":"2024-11-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142664215","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":"The effect of stress history on the critical shear stress of bedload transport in gravel-bed streams","authors":"Haoqi Yang ,&nbsp;Xinqi Hu ,&nbsp;Sen Wang ,&nbsp;Kai Cheng ,&nbsp;Ming Luo ,&nbsp;Haizhou Wang ,&nbsp;Jiahao Shi","doi":"10.1016/j.jhydrol.2024.132208","DOIUrl":"10.1016/j.jhydrol.2024.132208","url":null,"abstract":"<div><div>Critical shear stress is a pivotal parameter that describes the bedload transport and riverbed stability. Recent studies indicate that different interevent periods in gravel-bed streams can lead to a realignment of riverbed structures, thereby disrupting the bedload transport. In this research, a series of flume experiments were conducted to study the effect of stress history on the critical shear stress of bedload transport in a gravel-bed channel. The results reveal the temporal-spatial variation patterns of critical shear stress. The critical shear stress has an increased trend after interevent with low flow and long duration. Conversely, a decreasing trend in critical shear stress observed after low flow and short duration conditions. After interevent durations with medium to high flow condition, no matter the duration, critical shear stress shows a decreasing trend. A significant positive correlation between the flow magnitude of the interevent period and the critical shear stress of the subsequent flood period is shown. Besides, critical shear stress has a significant spatial variation pattern on the gravel bed due to the presence of microtopography as revealed by the correlation analysis results among the spatial density of microtopography with different protrusion heights, riverbed statistical parameters, and critical shear stress. Moreover, the stress history, by adjusting the position of fine particles on the riverbed surface through different magnitudes and durations of the interevent period, affects the spatial density of the microtopography, thereby influencing the critical shear stress. The conventional bedload transport equations are deficit by only considering the riverbed slope or standard deviation of bed surface elevation. An optimization of the critical shear stress calculation method, based on parameter correlation analysis, is proposed, potentially enhancing the calculation accuracy of bedload transport in mountainous rivers.</div></div>","PeriodicalId":362,"journal":{"name":"Journal of Hydrology","volume":"645 ","pages":"Article 132208"},"PeriodicalIF":5.9,"publicationDate":"2024-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142663521","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}