Journal of Hydrology最新文献

{"title":"Measuring Off-nadir river water levels and slopes from altimeter Fully-Focused SAR mode","authors":"Jiaming Chen, Luciana Fenoglio, Jürgen Kusche","doi":"10.1016/j.jhydrol.2024.132553","DOIUrl":"https://doi.org/10.1016/j.jhydrol.2024.132553","url":null,"abstract":"Observations of river water levels from nadir radar altimeters are currently limited by orbital spacing and by the winding nature of rivers, making them inadequate for monitoring the spatial–temporal dynamics of rivers. In this study, we developed an automatic off-nadir processing method to estimate water surface elevation and river slope in cross-track direction using Sentinel-3A/-3B and Sentinel-6A Fully-Focused SAR (FFSAR) processed data. Once the off-nadir reflected echoes are recorded in the range window, a slant range correction is applied to the retracked range to obtain the water level. From both the satellite altitude and the position of range window, we find that the maximum cross-track distance usable in this method is 6.6 km for Sentinel-3A/-3B and 9.3 km for Sentinel-6A. The validation of off-nadir water surface elevations (WSEs) in three rivers (Rhine, Danube, and Oder) against in-situ data, shows an accuracy in terms of standard deviation of difference (STDD) between 0.04 and 0.09 m for Sentinel-3A/-3B and Sentinel-6A. Moreover, the water surface slopes estimated from off-nadir processing, compared to slopes derived from in-situ data, show an accuracy, in terms of STDD, varying from 0.7 cm/km to 1.3 cm/km. Comparison of the river profiles over a 60-km river channel from off-nadir and wide-swath altimetry data, shows a STDD of 0.14 m for Sentinel-6 and 0.19 m for Sentinel-3B respectively. This study confirms the effectiveness of off-nadir processing in improving the accuracy of river surface elevation and slope measurements.","PeriodicalId":362,"journal":{"name":"Journal of Hydrology","volume":"31 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142874035","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 impact of wave-topography interaction on submarine groundwater discharge – Transport, turbulence, and mixing over rough seabeds","authors":"Helena Stirnweiß, Leonie Kandler, Sven Grundmann, Martin Brede","doi":"10.1016/j.jhydrol.2024.132507","DOIUrl":"https://doi.org/10.1016/j.jhydrol.2024.132507","url":null,"abstract":"In the coastal zone, submarine groundwater discharge (SGD) is a vital pathway for terrestrial-derived substances to the sea. Wave-topography interaction can drive porewater exchange that influences the fluxes of SGD into the water column and affect its distribution, transport, and mixing within the water column. To study this interaction, we conduct a laboratory experiment, altering both the wave scenario and the seabed topography. The selected seabeds comprise a flat bed and three gravelly beds, whose gravel elements vary in size. SGD is emulated by pumping a tracer fluid into the seabed and its concentration in the water column is measured. Coupled with measurements of the velocity field, the turbulent fluxes of the tracer are thus determined, providing information on the SGD fluxes into the water column, as well as the transport and mixing behavior within the water column. The results show a strong variation of the turbulent flux and patterns of the tracer concentration based on both wave scenario and seabed topography. In combination, they suggest different drivers of porewater exchange being present and enhancing the tracer fluxes. Wave pumping and separated vortices contributed to varying degrees for the different seabeds. Unexpectedly, the increased roughness of the gravelly beds did not explicitly result in increased porewater exchange compared to the flat bed, as wave pumping was blocked over the gravelly beds. Nonetheless, the impact of separated vortices above gravelly beds grew with size and ultimately reached comparable dimension to wave pumping over the flat bed.","PeriodicalId":362,"journal":{"name":"Journal of Hydrology","volume":"24 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142874083","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":"Experimental study on the sensitivity of deep-buried limestone porosity to effective stress in groundwater reservoirs","authors":"Zhifang Zhou, Ziwen Zhou","doi":"10.1016/j.jhydrol.2024.132514","DOIUrl":"https://doi.org/10.1016/j.jhydrol.2024.132514","url":null,"abstract":"The sensitivity of rock porosity to effective stress is critical for calculating reserves in both hydrocarbon and groundwater reservoirs and for clarifying transport transformations between surface water and groundwater in hydropower projects. This study addresses the pressing need to understand the impact of porosity sensitivity to effective stress in the deep pressurised aquifers of hydropower stations on the long-term safety and stability of extra-high dams post-impoundment. An effective stress-porosity experimental curve for deep-buried limestone is established based on variable confining pressure seepage experiments conducted on specimens sourced from on-site drilling at the Xiluodu reservoir, the world’s fourth largest, with a dam height of 285.5 m. The differences in the response of limestone porosity to effective stress between hydrocarbon and groundwater reservoirs is explored by comparing existing limestone effective stress-porosity curves for hydrocarbon reservoirs worldwide. First, the applicability and limitations of various fitting methods for effective stress-porosity curves are compared using measured data. Subsequently, a modified exponential fitting method that accounts for dead-end pores is proposed, significantly enhancing the curve-fitting accuracy for groundwater reservoirs. Finally, a probability distribution model of the measured effective stress-porosity data, conforming to a normal distribution, is constructed via the Monte Carlo method. This model is used to derive a statistically significant effective stress-porosity fitting expression for Xiluodu limestone based on limited experimental data. This study provides parameters and a microscopic research basis for understanding water transport in aquifers and regional deformation processes induced by impoundment, such as river valley contraction and settlement deformation, and for informing the rehabilitation of overexploited aquifers.","PeriodicalId":362,"journal":{"name":"Journal of Hydrology","volume":"31 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142874039","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":"Soil effective clay content and sediment load reduce soil detachment rate by rill flow","authors":"Chunhong Zhou, Nan Shen, Fengbao Zhang, Qilin He, Jiaru Luo, Wanyun Huang, Feng Jiao","doi":"10.1016/j.jhydrol.2024.132512","DOIUrl":"https://doi.org/10.1016/j.jhydrol.2024.132512","url":null,"abstract":"Soil detachment and sediment transport are the two primary rill erosion processes. The sediment load in rill flow undergoes continuous variation due to the continuity and feedback of soil detachment and sediment transport processes, potentially impacting the soil detachment rate in the next stage. However, numerous studies focus on the soil detachment process by clear rill flow, and the few existing studies on soil detachment process by sediment-laden rill flow fail to consider the effect of soil properties. Therefore, this study was conducted to analyze the effect of soil properties and sediment load on the soil detachment rate by sediment-laden rill flow (<ce:italic>D<ce:inf loc=\"post\">r</ce:inf></ce:italic>), decipher the variation in <ce:italic>D<ce:inf loc=\"post\">r</ce:inf></ce:italic>, and establish a model equation to predict <ce:italic>D<ce:inf loc=\"post\">r</ce:inf></ce:italic>, where soil properties and sediment load were introduced. An indoor rill flume simulation experiment was conducted under combinations of five soil types, five slopes, five flow discharges, and five sediment loads. The results revealed that the <ce:italic>D<ce:inf loc=\"post\">r</ce:inf></ce:italic> of Shenmu sandy loess is the largest with a mean of 2.06 kg m<ce:sup loc=\"post\">−2</ce:sup> s<ce:sup loc=\"post\">−1</ce:sup>, followed by <ce:italic>D<ce:inf loc=\"post\">r</ce:inf></ce:italic> of Ansai loess (1.57 kg m<ce:sup loc=\"post\">−2</ce:sup> s<ce:sup loc=\"post\">−1</ce:sup>), Yangling clay loess (1.37 kg m<ce:sup loc=\"post\">−2</ce:sup> s<ce:sup loc=\"post\">−1</ce:sup>), Dingbian sandy loess (1.19 kg m<ce:sup loc=\"post\">−2</ce:sup> s<ce:sup loc=\"post\">−1</ce:sup>), and Changwu loess (1.14 kg m<ce:sup loc=\"post\">−2</ce:sup> s<ce:sup loc=\"post\">−1</ce:sup>). The effective clay content was the optimal soil property index correlation with <ce:italic>D<ce:inf loc=\"post\">r</ce:inf></ce:italic>. <ce:italic>D<ce:inf loc=\"post\">r</ce:inf></ce:italic> decreased with increasing sediment load and effective clay content. Variation partitioning revealed that the explanatory fraction of flow discharge was the highest (0.32), followed by the sediment load (0.21), slope (0.19), and effective clay content (0.14). There are interactions among the influencing factors in process of soil detachment. The sediment load level and effective clay content could inhibit the influence of flow discharge on the <ce:italic>D<ce:inf loc=\"post\">r</ce:inf></ce:italic>. The higher the slope, flow discharge, and sediment load level, the greater the influence of the effective clay content on the <ce:italic>D<ce:inf loc=\"post\">r</ce:inf></ce:italic>. <ce:italic>D<ce:inf loc=\"post\">r</ce:inf></ce:italic> by sediment-laden rill flow can be modeled using a quaternary power function of the slope gradient, flow discharge, sediment load, and effective clay content (<ce:italic>R<ce:sup loc=\"post\">2</ce:sup></ce:italic> = 0.863). Introducing the sediment load and effective clay content as factors in the model equation","PeriodicalId":362,"journal":{"name":"Journal of Hydrology","volume":"50 1 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142825411","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":"Spatial-temporal dynamics of meteorological and agricultural drought in Northwest China: Propagation, drivers and prediction","authors":"Yining Ma, Jiawei Ren, Shaozhong Kang, Jun Niu, Ling Tong","doi":"10.1016/j.jhydrol.2024.132492","DOIUrl":"https://doi.org/10.1016/j.jhydrol.2024.132492","url":null,"abstract":"Conventional drought studies have predominantly focused on elucidating the temporal-spatial evolution of drought while neglecting research on drought propagation. Various degrees of correspondence exist within the same drought propagation mode. This study utilized the Standardized Precipitation Evapotranspiration Index (SPEI) and Vegetation Condition Index (VCI) to characterize meteorological drought (MD) and agricultural drought (AD). The temporal-spatial characteristics of drought in Northwest China (NWC) from 1982 to 2020 were examined. Subsequently, the interaction between AD and MD was investigated, encompassing correlation, time-lag, propagation characteristics, and primary modes of propagation. Then, the impacts of climate change (CC) and human activities (HA) on AD were individually assessed and quantified. Finally, the probability and return period of drought propagation in different degrees were predicted. The findings reveal that: (1) MD exhibited short duration, high frequency, and low severity, whereas AD was less frequent but endured longer and caused greater harm. In recent 40 years, MD has shown a decrease, while AD has worsened. (2) AD typically lagged behind MD by 1–3 months, with about 33.72 % of regions experiencing a time-lag of approximately 1 month. Generally, AD displayed a positive correlation with MD, although the adverse impact of MD on AD has lessened in the last decade. (3) The primary mode of drought propagation in NWC was “one-to-one,” while in Ningxia, Gansu, and southern Xinjiang, it was “multiple-to-one.” (4) The sensitivity of AD to different climatic environmental factors exhibited noteworthy geographical variations, with SPEI, soil moisture, and maximum temperature exerting a more substantial impact on AD. CC predominantly had a positive contribution with AD, whereas HA exhibited a negative contribution in 54.24 % of the regions. (5) Future MD was projected to mainly consist of light drought, with AD dominated by no, light, and severe drought. AD was more serious in Qinghai, Ningxia and northern Xinjiang. Different degree of MD can easily lead to the same degree or more severe AD. Analyses of the return period of drought revealed that severe AD may have a greater adverse impact on the agricultural development of NWC in the future.","PeriodicalId":362,"journal":{"name":"Journal of Hydrology","volume":"43 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142825416","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":"Interactions between antibiotic resistance and arsenic metabolizing genes in geogenic contaminated groundwater: Consequence for arsenic migration","authors":"Junna Ning, Kunfu Pi, Xianjun Xie, Qianyong Liang, Philippe Van Cappellen, Yanxin Wang","doi":"10.1016/j.jhydrol.2024.132509","DOIUrl":"https://doi.org/10.1016/j.jhydrol.2024.132509","url":null,"abstract":"Geogenic contaminants and emerging contaminants co-occur frequently in disturbed aquifer environments, complicating the evolution of geogenic contaminated groundwater and resultant health risk posed to human beings. The development of antimicrobial resistance (AMR) was found to affect critical microbial activities responsible for arsenic (As) mobilization, yet the underlying processes and mechanism remain undervalued from limited field investigation. By virtue of joint field campaign, molecular biological analysis, and hydrogeochemical modeling, this research provides novel insights into influence of cross-resistance between As and antibiotics on As biotransformation and enrichment in groundwater. Our basin-scale hydrogeological investigation reveals that lithological characteristics of Quaternary formations and associated regional groundwater flow regime led to gradual co-increase of antibiotic and As concentrations from recharge area to discharge area. While antibiotic resistance genes (ARGs) in groundwater exhibited spotty distribution pattern in the recharge area, they tended to accumulate in the discharge area. Consequently, microbially-mediated Fe(III)-oxide reduction was inhibited in groundwater subject to high-level antibiotics, whereas microbial SO<ce:inf loc=\"post\">4</ce:inf><ce:sup loc=\"post\">2-</ce:sup> reduction was sustained under high-antibiotic environmental stress. Moreover, cross-resistance was likely to develop after the accumulation of ARGs, thereby enhancing As biotransformation and re-migration. Hence, primary mechanism underlying As enrichment probably shifted from microbial dissolution of Fe(III) oxides to ARGs-driven As bio-migration in antibiotic-affected aquifers. These findings highlight the underestimated impact of AMR on evolution of geogenic As-contaminated groundwater in areas with significant antibiotic pollution. This research additionally warrants a careful re-assessment of in-situ groundwater remediation approaches in disturbed aquifer environments.","PeriodicalId":362,"journal":{"name":"Journal of Hydrology","volume":"1 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2024-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142825412","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":"Unravelling soil moisture uncertainties in GRACE groundwater modelling","authors":"Ikechukwu Kalu, Christopher E. Ndehedehe, Vagner G. Ferreira, Sreekanth Janardhanan, Mark J. Kennard","doi":"10.1016/j.jhydrol.2024.132489","DOIUrl":"https://doi.org/10.1016/j.jhydrol.2024.132489","url":null,"abstract":"Soil moisture data is essential for estimating groundwater storage anomalies (GWSA) from the Gravity Recovery and Climate Experiment (GRACE) data, but the general lack of direct in-situ root-zone soil moisture observations has typically resulted in a reliance on modelled soil moisture estimates instead. These model-simulated soil moisture profiles – upper (0 to 10 cm), lower (10 to 100 cm), and deep layers (100 to 200 cm), are characterized by large uncertainties due to the simplification and parameterization of soil moisture processes in hydrological models. It is thus crucial to account for these uncertainties and understand how they affect the estimation of groundwater storage changes based on GRACE data. In this study, we evaluated the contributions and impacts of different soil moisture profiles on GRACE-derived groundwater storage (between 2002 and 2016) modelling uncertainties over the Murray Darling Basin (MDB) using statistical and machine learning regression. We observed that the lower layer exhibited the strongest correlation with base GWSA, particularly during 2006 to 2009 (r = 0.99, RMSE = 7.50 mm). Bootstrap analysis indicated that the lower layer consistently had the largest absolute coefficient weights, signifying its predominant influence on GWSA predictions. The deep layer contributed the least during 2010 to 2013, while the upper layer was highly dynamic and introduced a 26.8 % more uncertainty rating when compared to the lower layer. Regression analysis showed the lower layer maintained the smallest confidence interval widths, confirming its reliability. The Monte Carlo resampling corroborated these findings, with the lower layer maintaining the most consistent relationship with base GWSA across all periods. The lower layer’s steadier state and lower susceptibility to surface disturbances provided more accurate predictions than other layers. This study advances the modelling of groundwater storage from space by improving our understanding of the uncertainties introduced by the different soil moisture layers. It will be helpful for better and accurate freshwater reporting and management.","PeriodicalId":362,"journal":{"name":"Journal of Hydrology","volume":"23 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142825417","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":"Terrestrial ecosystem resilience to drought stress and driving mechanisms thereof in the Yellow River Basin, China","authors":"Xueying Zhu, Shengzhi Huang, Vijay P. Singh, Qiang Huang, Hongbo Zhang, Guoyong Leng, Liang Gao, Pei Li, Wenwen Guo, Jian Peng","doi":"10.1016/j.jhydrol.2024.132480","DOIUrl":"https://doi.org/10.1016/j.jhydrol.2024.132480","url":null,"abstract":"As the intensity and frequency of droughts increase, the vegetation community structure and terrestrial ecosystem are therefore threatened. However, the terrestrial ecosystem resilience under drought stress or its underlying drivers, remains poorly understood, hindering effective ecological protection and sustainable development efforts. Taking the Yellow River Basin (YRB) as an example, we constructed a resilience evaluation function by integrating the entropy weight method with the stability, resistance and recovery metrics. In general, the proposed resilience metric of terrestrial ecosystem under drought stress was proved to be reliable, highlighting a spatial pattern characterized by higher resilience in the southern regions and lower resilience in the northern areas. The forests exhibited greater resistance but slower recovery compared to grasslands, emerging as the most resilient vegetation type among the local ecosystems. The resilience pattern was largely dominated by precipitation (P), temperature (T) and plant biodiversity (PB), while P and T could have also indirect effects on resilience through PB. Moreover, we also found a significant threshold effect of PB on resilience. This study provides new insights into quantifying drought resilience and dominant drivers, which can help ecological protection and restoration of the YRB.","PeriodicalId":362,"journal":{"name":"Journal of Hydrology","volume":"1 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142825414","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":"Understanding riverbank erosion through the Lens of Turbulence: A review","authors":"Vikas Kumar Das, Koustuv Debnath","doi":"10.1016/j.jhydrol.2024.132484","DOIUrl":"https://doi.org/10.1016/j.jhydrol.2024.132484","url":null,"abstract":"The loss of land due to riverbank erosion is a crucial factor in shaping landforms and plays a significant role in fluvial geomorphology. Understanding and the quantification of the movement and the initiation of sediment particles are the key elements in various engineering and environmental studies. The entrainment and the transportation of sediment particles are controlled by many different physical processes in the sediment water interface. Among such processes, the characteristics of turbulence and the associated coherent structures within the flow are of utmost importance. Riverbank erosion is one of the major natural disasters and an issue of major concern. Flow turbulence plays an important role in riverbank erosion and in the shaping of the river planform. Eddies are pivotal in turbulence generation that sustain the random velocity fluctuations and continually distribute energy and exchange momentum through the eddy breakdown process, a feature absent in laminar flow. In this review paper a precise articulation of the characterization of turbulence parameters on riverbank erosion mechanism is presented together with different available river turbulence measurement techniques that are in use. Further, the investigations that explored the bank erosion process mechanisms both on natural riverbanks as well as in laboratory flumes in context of turbulence has also been discussed. Key insights include the impact of varying turbulence intensities on erosion rates, and the effectiveness of different turbulence parameters in the characterization of bank erosion. The review also identifies the gaps in the existing methodologies, emphasizing the need for standardizing the available techniques to enable cross-comparisons among studies. This paper provides a comprehensive summary of current measurement techniques for turbulence in riverbank regions, offering recommendations for future research and contributing valuable insights to the broader understanding of sediment transport and riverbank dynamics. Additionally, the discussion also outlines potential directions for future developments. This review paper in indented to discuss the characterisation of the turbulence parameters at the near bank region.","PeriodicalId":362,"journal":{"name":"Journal of Hydrology","volume":"252 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142825419","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":"Integration of SWAT-DPS and optimization algorithm for spatial design of ditch-pond systems in small agricultural catchments","authors":"Cheng Sun, Shibo Chen, Qingqing Zuo, Lei Chen, Zhenyao Shen","doi":"10.1016/j.jhydrol.2024.132510","DOIUrl":"https://doi.org/10.1016/j.jhydrol.2024.132510","url":null,"abstract":"Ditches and ponds are widely used in rural landscapes, forming integrated adaptation systems that play a pivotal role in reducing non-point source (NPS) pollution. However, existing semi-distributed models are not capable of accurately simulating pollution removals of ditches and ponds, resulting in a critical gap in integrating simulation, optimization, and spatial configuration for effective pollution control. To address this issue, the newly developed SWAT-DPS model was integrated with multi-objective optimization to construct an integrated framework for optimizing the layouts of ditches and ponds while effectively balancing environmental and economic benefits. This framework enables more accurate grid-scale simulation of pollution reduction of measures, offering more practical layout solutions. Results showed that implementing vegetated ditches, multiple ponds, and vegetation filter strips could reduce NPS pollutants by 20–60 %. Comparative analysis revealed the costs ranging from 0 to 6.28 × 10⁶ yuan, with all cost levels achieving required reductions in total nitrogen (TN) and total phosphorus (TP). Specifically, TN reductions exceeded 60 % in the medium-cost scheme, while TP reductions reached 60 % similarly in the high-cost scheme. This study provides a flexible framework for evaluating the removal efficiencies of NPS pollution, with fully consideration of the spatial configuration of ditch-pond system.","PeriodicalId":362,"journal":{"name":"Journal of Hydrology","volume":"63 5 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142825413","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}