Water Resources Research最新文献_第9页

Evidence of Subsurface Control on the Coevolution of Hillslope Morphology and Runoff Generation 地表下控制山坡形态和径流生成共同演变的证据

IF 5.4 1区地球科学

Water Resources Research Pub Date : 2024-10-09 DOI: 10.1029/2024wr037301

David G. Litwin, Ciaran J. Harman

{"title":"Evidence of Subsurface Control on the Coevolution of Hillslope Morphology and Runoff Generation","authors":"David G. Litwin, Ciaran J. Harman","doi":"10.1029/2024wr037301","DOIUrl":"https://doi.org/10.1029/2024wr037301","url":null,"abstract":"Topography is a key control on runoff generation, as topographic slope affects hydraulic gradients and curvature affects water flow paths. Simultaneously, runoff generation shapes topography through erosion, affecting landscape morphology over long timescales. Previous modeling efforts suggest that subsurface hydrological properties, relative to climate, are key mediators of this relationship. Specifically, when subsurface transmissivity and water storage capacity are low, (a) saturated areas and storm runoff should be larger and more variable, and (b) hillslopes shorter and lower relief, assuming other geomorphic factors are held constant. However, it remains uncertain whether subsurface properties can exert such strong controls on emergent properties in real landscapes. We compared emergent hydrological function and topography in two watersheds with very similar climatic and tectonic history, but very different subsurface properties due to contrasting bedrock lithology. We found that hillslopes were systematically shorter and saturated areas more dynamic at the lower transmissivity site. To test whether these features could be the result of coevolution between topography, hydrological function, and subsurface properties, we estimated all parameters of a coupled groundwater-landscape evolution model for each site. Limitations were revealed in the model's ability to reproduce aspects of morphology and hydrologic behavior, however, model results suggested differences in hillslope length and variably saturated area between the sites could be explained by differences in subsurface properties, and not by differences in geomorphic process rates alone. This work demonstrates one way subsurface hydrology can profoundly affect landscape evolution.","PeriodicalId":23799,"journal":{"name":"Water Resources Research","volume":"55 1","pages":""},"PeriodicalIF":5.4,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142398536","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}

引用次数: 0

Challenges and Future Directions in Quantifying Terrestrial Evapotranspiration 量化陆地蒸散量的挑战和未来方向

IF 5.4 1区地球科学

Water Resources Research Pub Date : 2024-10-08 DOI: 10.1029/2024wr037622

Koong Yi, Gabriel B. Senay, Joshua B. Fisher, Lixin Wang, Kosana Suvočarev, Housen Chu, Georgianne W. Moore, Kimberly A. Novick, Mallory L. Barnes, Trevor F. Keenan, Kanishka Mallick, Xiangzhong Luo, Justine E. C. Missik, Kyle B. Delwiche, Jacob A. Nelson, Stephen P. Good, Xiangming Xiao, Steven A. Kannenberg, Arman Ahmadi, Tianxin Wang, Gil Bohrer, Marcy E. Litvak, David E. Reed, A. Christopher Oishi, Margaret S. Torn, Dennis Baldocchi

{"title":"Challenges and Future Directions in Quantifying Terrestrial Evapotranspiration","authors":"Koong Yi, Gabriel B. Senay, Joshua B. Fisher, Lixin Wang, Kosana Suvočarev, Housen Chu, Georgianne W. Moore, Kimberly A. Novick, Mallory L. Barnes, Trevor F. Keenan, Kanishka Mallick, Xiangzhong Luo, Justine E. C. Missik, Kyle B. Delwiche, Jacob A. Nelson, Stephen P. Good, Xiangming Xiao, Steven A. Kannenberg, Arman Ahmadi, Tianxin Wang, Gil Bohrer, Marcy E. Litvak, David E. Reed, A. Christopher Oishi, Margaret S. Torn, Dennis Baldocchi","doi":"10.1029/2024wr037622","DOIUrl":"https://doi.org/10.1029/2024wr037622","url":null,"abstract":"Terrestrial evapotranspiration is the second-largest component of the land water cycle, linking the water, energy, and carbon cycles and influencing the productivity and health of ecosystems. The dynamics of ET across a spectrum of spatiotemporal scales and their controls remain an active focus of research across different science disciplines. Here, we provide an overview of the current state of ET science across in situ measurements, partitioning of ET, and remote sensing, and discuss how different approaches complement one another based on their advantages and shortcomings. We aim to facilitate collaboration among a cross-disciplinary group of ET scientists to overcome the challenges identified in this paper and ultimately advance our integrated understanding of ET.","PeriodicalId":23799,"journal":{"name":"Water Resources Research","volume":"33 1","pages":""},"PeriodicalIF":5.4,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142384964","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}

引用次数: 0

Simulation of the Full-Process Dynamics of Floating Vehicles Driven by Flash Floods 山洪驱动的漂浮车辆全过程动力学模拟

IF 5.4 1区地球科学

Water Resources Research Pub Date : 2024-10-08 DOI: 10.1029/2023wr036739

Yan Xiong, Qiuhua Liang, Jinhai Zheng, Gang Wang, Xue Tong

{"title":"Simulation of the Full-Process Dynamics of Floating Vehicles Driven by Flash Floods","authors":"Yan Xiong, Qiuhua Liang, Jinhai Zheng, Gang Wang, Xue Tong","doi":"10.1029/2023wr036739","DOIUrl":"https://doi.org/10.1029/2023wr036739","url":null,"abstract":"Flash flooding has become more prominent under climate change, threatening people's life and property. Post-event investigations of recent events emphasize the role of floating debris, such as vehicles, in exacerbating damage. Few modeling methods and tools have been developed to simulate the full-process dynamics of floating debris driven by large-scale flood waves in real world. In this work, a fully coupled model is developed for simulating the full-process interactive movements of vehicles driven by flash flood hydrodynamics, from entrainment, transport to deposition. The proposed coupled modeling system consists of a finite volume shock-capturing hydrodynamic model solving the 2D shallow water equations and a 3D discrete element method (DEM) model. The proposed two-way coupling approach estimates the hydrostatic and hydrodynamic forces acting on solid objects using the water depth and velocity predicted by the hydrodynamic model; the resulting counter forces on the fluid flow are then considered by adding extra source terms in the hydrodynamic model. A multi-sphere method is further embedded in the DEM model to better represent vehicle shapes. New calculation modules are further implemented to represent the vehicle entrainment, contact and stopping motions. The coupled model is applied to reproduce a flash flood event hit Boscastle in the UK in 2004. Over 100 vehicles were moved and carried downstream by the highly transient flood flow. The model well predicts the hydrodynamics, interactive transport process and the final locations of vehicles. The proposed coupled model provides a new tool for simulating large-scale flash flooding processes, including debris dynamics.","PeriodicalId":23799,"journal":{"name":"Water Resources Research","volume":"12 1","pages":""},"PeriodicalIF":5.4,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142384961","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}

引用次数: 0

Towards Interpretable Physical-Conceptual Catchment-Scale Hydrological Modeling Using the Mass-Conserving-Perceptron 利用质量保证感知器建立可解释的物理概念集水尺度水文模型

IF 5.4 1区地球科学

Water Resources Research Pub Date : 2024-10-08 DOI: 10.1029/2024wr037224

Yuan-Heng Wang, Hoshin V. Gupta

{"title":"Towards Interpretable Physical-Conceptual Catchment-Scale Hydrological Modeling Using the Mass-Conserving-Perceptron","authors":"Yuan-Heng Wang, Hoshin V. Gupta","doi":"10.1029/2024wr037224","DOIUrl":"https://doi.org/10.1029/2024wr037224","url":null,"abstract":"We investigate the applicability of machine learning technologies to the development of parsimonious, interpretable, catchment-scale hydrologic models using directed-graph architectures based on the mass-conserving perceptron (MCP) as the fundamental computational unit. Here, we focus on architectural complexity (depth) at a single location, rather than universal applicability (breadth) across large samples of catchments. The goal is to discover a minimal representation (numbers of cell-states and flow paths) that represents the dominant processes that can explain the input-state-output behaviors of a given catchment, with particular emphasis given to simulating the full range (high, medium, and low) of flow dynamics. We find that a “HyMod Like” architecture with three cell-states and two major flow pathways achieves such a representation at our study location, but that the additional incorporation of an input-bypass mechanism significantly improves the timing and shape of the hydrograph, while the inclusion of bi-directional groundwater mass exchanges significantly enhances the simulation of baseflow. Overall, our results demonstrate the importance of using multiple diagnostic metrics for model evaluation, while highlighting the need for properly selecting and designing the training metrics based on information-theoretic foundations that are better suited to extracting information across the full range of flow dynamics. This study sets the stage for interpretable regional-scale MCP-based hydrological modeling (using large sample data) by using neural architecture search to determine appropriate minimal representations for catchments in different hydroclimatic regimes.","PeriodicalId":23799,"journal":{"name":"Water Resources Research","volume":"55 1","pages":""},"PeriodicalIF":5.4,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142384959","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}

引用次数: 0

A Novel Theoretical Method for Upscaling Permeability in Hydrate-Bearing Sediments 提高含水沉积物渗透性的新型理论方法

IF 5.4 1区地球科学

Water Resources Research Pub Date : 2024-10-08 DOI: 10.1029/2024wr037729

Xiwei Gao, Gang Lei, Yingjie Zhao, Qinzhuo Liao, Fulong Ning

{"title":"A Novel Theoretical Method for Upscaling Permeability in Hydrate-Bearing Sediments","authors":"Xiwei Gao, Gang Lei, Yingjie Zhao, Qinzhuo Liao, Fulong Ning","doi":"10.1029/2024wr037729","DOIUrl":"https://doi.org/10.1029/2024wr037729","url":null,"abstract":"The accurate prediction of Darcy-scale permeability (absolute permeability and gas-water relative permeability) of hydrate-bearing sediments (HBS) plays a crucial role in assessing reservoir potential and optimizing recovery strategies. However, the challenges of field coring, the rigorous conditions encountered in laboratory permeability tests, and the multi-scale pore structure characteristics of HBS complicate the understanding of the relationship between pore structures and Darcy-scale permeability of HBS. In this study, we propose an innovative upscaling method that integrates flow properties of typical regions, such as coarse, medium, and fine regions, to predict the Darcy-scale permeability of HBS from the pore-scale. This method considers two hydrate habits (pore-filling and grain-coating hydrates), heterogeneity and anisotropy of HBS, and multi-scale pore structures. Taking the absolute permeability of hydrate-free sediments in the y direction for example, the permeability values for the fine region, the medium region, the coarse region, and the equivalent HBS are 9.43 D, 13.59 D, 18.87 D, and 14.06 D, respectively. Thus, the predicted permeability (14.06 D) is much closer to the experimental data (15.44 D), which validates the efficacy of our upscaling method in estimating Darcy-scale permeability. Moreover, the characteristics of our predicted Darcy-scale permeability align with those reported in previous literature. This approach introduces a groundbreaking perspective for predicting permeability in HBS from pore-scale to Darcy-scale. It offers essential insights into predicting permeability in HBS while effectively preserving the impact of pore-scale structural variations caused by local heterogeneity and facilitating numerical simulations of gas production from hydrate reservoirs.","PeriodicalId":23799,"journal":{"name":"Water Resources Research","volume":"66 1","pages":""},"PeriodicalIF":5.4,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142415776","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}

引用次数: 0

Ecological Connectivity of River-Lake Ecosystem: Evidence From Fish Population Dynamics in a Connecting Channel 河湖生态系统的生态连通性：连接河道中鱼类种群动态的证据

IF 5.4 1区地球科学

Water Resources Research Pub Date : 2024-10-08 DOI: 10.1029/2024wr037495

Jiajian Qiu, Saiyu Yuan, Hongwu Tang, Qi Zhang, Christian Wolter, Vladimir Nikora

{"title":"Ecological Connectivity of River-Lake Ecosystem: Evidence From Fish Population Dynamics in a Connecting Channel","authors":"Jiajian Qiu, Saiyu Yuan, Hongwu Tang, Qi Zhang, Christian Wolter, Vladimir Nikora","doi":"10.1029/2024wr037495","DOIUrl":"https://doi.org/10.1029/2024wr037495","url":null,"abstract":"Climate change and human activities, for example, dam construction, largely affect hydrologic and hydrodynamic processes of river-lake system, and hence exerted serious pressure on its aquatic ecology. It's challenging to restore its ecological environment without systematic investigation and knowledge about the features of hydrodynamics, water quality, and aquatic ecology. This study conducted field surveys of hydrodynamic, water quality, and fish distribution in the Yangtze-Poyang system, the largest river and largest fresh lake in China, to investigate the effects of hydrologic and hydrodynamic variations on fish population dynamics, especially the extreme drought and its effects were largely concerned. In two surveys, discharge decreased from 12,000 m3/s to less than 1,000 m3/s. Distinct differences on fish density, species composition, and populations connectivity between two surveys were observed. During high-water, connecting channel secured effective transition of river-lake habitats, its strong hydrological connectivity and flow heterogeneity supported great biodiversity and bidirectional populations connectivity. Limited flow space and elevated turbidity during low-water confined fish to a few channel units with sufficient depth and width, increasing fish density up to 7 times greater than during high-water, and seriously weakening ecological connectivity of the system. Furthermore, species interaction was intensified due to limited environmental capacity, periodic strategists were favored while opportunistic strategists visibly diminished, leading to a dramatic decline in species by nearly half. In the future with increasingly frequent extreme climate, engineering measures, for example, effective ecological project regulation, are needful to alleviate the drought problem, being of great significance for maintaining ecological connectivity within the river-lake system.","PeriodicalId":23799,"journal":{"name":"Water Resources Research","volume":"57 1","pages":""},"PeriodicalIF":5.4,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142384960","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}

引用次数: 0

Premelting Theory-Based Mechanism for Water Freezing in Saline Soil 基于预熔理论的盐碱地水冻结机制

IF 5.4 1区地球科学

Water Resources Research Pub Date : 2024-10-07 DOI: 10.1029/2024wr038013

Xusheng Wan, Jishuai Zhu, Ying Lai, Jianguo Lu, Zhongrui Yan

{"title":"Premelting Theory-Based Mechanism for Water Freezing in Saline Soil","authors":"Xusheng Wan, Jishuai Zhu, Ying Lai, Jianguo Lu, Zhongrui Yan","doi":"10.1029/2024wr038013","DOIUrl":"https://doi.org/10.1029/2024wr038013","url":null,"abstract":"The unfrozen water content constitutes a pivotal parameter in freezing soil, significantly impacting its thermal-mechanical and deformation behavior. This study delves into the alterations in soil attributes as unfrozen water content varies. It examines the influences of impurities, van der Waals forces, and Coulomb forces on the water film, employing the premelting theory as a foundation. A critical state curve quantifying the ratio of the surface charge density to impurity concentration is parameterized for various soil types. Subsequently, combining the theory of effective solution concentration, we have provided calculation methods for the particle surface parameters of pore solutions as ideal and non-ideal dilute solutions, respectively. This has determined the key variables in the model. Additionally, through the integration of equivalent particle sizes, packing structure, and water film thickness, a calculation model is devised and verified for determining the unfrozen water content and residual water content within in freezing soil. The findings indicate that fluctuation in the unfrozen water content primarily stem from impurities. In soils with equivalent saline content, impurity levels exhibit proportionality to the equivalent particle sizes. The residual unfrozen water is predominantly present within the absorbed water layer.","PeriodicalId":23799,"journal":{"name":"Water Resources Research","volume":"5 1","pages":""},"PeriodicalIF":5.4,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142383815","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}

引用次数: 0

Assimilation of Sentinel-Based Leaf Area Index for Modeling Surface-Ground Water Interactions in Irrigation Districts 基于哨兵的叶面积指数同化用于灌区地表-地下水相互作用建模

IF 5.4 1区地球科学

Water Resources Research Pub Date : 2024-10-07 DOI: 10.1029/2023wr036080

Nima Zafarmomen, Hosein Alizadeh, Mehrad Bayat, Majid Ehtiat, Hamid Moradkhani

{"title":"Assimilation of Sentinel-Based Leaf Area Index for Modeling Surface-Ground Water Interactions in Irrigation Districts","authors":"Nima Zafarmomen, Hosein Alizadeh, Mehrad Bayat, Majid Ehtiat, Hamid Moradkhani","doi":"10.1029/2023wr036080","DOIUrl":"https://doi.org/10.1029/2023wr036080","url":null,"abstract":"Vegetation-related processes, such as evapotranspiration (ET), irrigation water withdrawal, and groundwater recharge, are influencing surface water (SW)—groundwater (GW) interaction in irrigation districts. Meanwhile, conventional numerical models of SW-GW interaction are not developed based on satellite-based observations of vegetation indices. In this paper, we propose a novel methodology for multivariate assimilation of Sentinel-based leaf area index (LAI) as well as in-situ records of streamflow. Moreover, the GW model is initially calibrated based on water table observations. These observations are assimilated into the SWAT-MODFLOW model to accurately analyze the advantage of considering high-resolution LAI data for SW-GW modeling. We develop a data assimilation (DA) framework for SWAT-MODFLOW model using the particle filter based on the sampling importance resampling (PF-SIR). Parameters of MODFLOW are calibrated using the parameter estimation (PEST) algorithm and based on in-situ observation of the GW table. The methodology is implemented over the Mahabad Irrigation Plain, located in the Urmia Lake Basin in Iran. Some DA scenarios are closely examined, including univariate LAI assimilation (L-DA), univariate streamflow assimilation (S-DA), and multivariate streamflow-LAI assimilation (SL-DA). Results show that the SL-DA scenario results in the best estimations of streamflow, LAI, and GW level, compared to other DA scenarios. The streamflow DA does not improve the accuracy of LAI estimation, while the LAI assimilation scenario results in significant improvements in streamflow simulation, where, compared to the open loop run, the (absolute) bias decreases from 75% to 6%. Moreover, S-DA, compared to L-DA, underestimates irrigation water use and demand as well as potential and actual crop yield.","PeriodicalId":23799,"journal":{"name":"Water Resources Research","volume":"56 1","pages":""},"PeriodicalIF":5.4,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142384968","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}

引用次数: 0

Evapotranspiration and Rainfall Effects on Post-Storm Salinization of Coastal Forests: Soil Characteristics as Important Factor for Salt-Intolerant Tree Survival 蒸散作用和降雨对沿海森林暴雨后盐碱化的影响：土壤特性是耐盐树木存活的重要因素

IF 5.4 1区地球科学

Water Resources Research Pub Date : 2024-10-04 DOI: 10.1029/2024wr037907

Giovanna Nordio, Sergio Fagherazzi

{"title":"Evapotranspiration and Rainfall Effects on Post-Storm Salinization of Coastal Forests: Soil Characteristics as Important Factor for Salt-Intolerant Tree Survival","authors":"Giovanna Nordio, Sergio Fagherazzi","doi":"10.1029/2024wr037907","DOIUrl":"https://doi.org/10.1029/2024wr037907","url":null,"abstract":"Flooding and salinization triggered by storm surges threaten the survival of coastal forests. After a storm surge event, soil salinity can increase by evapotranspiration or decrease by rainfall dilution. Here we used a 1D hydrological model to study the combined effect of evapotranspiration and rainfall on coastal vegetated areas. Our results shed light on tree root uptake and salinity infiltration feedback as a function of soil characteristics. As evaporation increases from 0 to 2.5 mm/day, soil salinity reaches 80 ppt in both sandy and clay loam soils in the first 5 cm of soil depth. Transpiration instead involves the root zone located in the first 40 cm of depth, affecting salinization in a complex way. In sandy loam soils, storm surge events homogeneously salinize the root zone, while in clay loam soils salinization is stratified, partially affecting tree roots. Soil salinity stratification combined with low permeability maintain root uptakes in clay loam soils 4/5-time higher with respect to sandy loam ones. When cumulative rainfall is larger than potential evapotranspiration ETp (ETp/Rainfall ratios lower than 1), dilution promotes fast recovery to pre-storm soil salinity conditions, especially in sandy loam soils. Field data collected after two storm surge events support the results obtained. Electrical conductivity (a proxy for salinity) increases when the ratio ETp/Rainfall is around 1.76, while recovery occurs when the ratio is around 0.92. In future climate change scenarios with higher temperatures and storm-surge frequency, coastal vegetation will be compromised, because of soil salinity values much higher than tolerable thresholds.","PeriodicalId":23799,"journal":{"name":"Water Resources Research","volume":"10 1","pages":""},"PeriodicalIF":5.4,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142377572","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}

引用次数: 0

Effects of Leafy Flexible Vegetation on Bed-Load Transport and Dune Geometry 多叶柔性植被对床面荷载传输和沙丘几何形状的影响

IF 5.4 1区地球科学

Water Resources Research Pub Date : 2024-10-03 DOI: 10.1029/2023wr036588

G. Artini, S. Francalanci, L. Solari, J. Aberle

{"title":"Effects of Leafy Flexible Vegetation on Bed-Load Transport and Dune Geometry","authors":"G. Artini, S. Francalanci, L. Solari, J. Aberle","doi":"10.1029/2023wr036588","DOIUrl":"https://doi.org/10.1029/2023wr036588","url":null,"abstract":"The development of sustainable river management strategies requires knowledge of the effect of vegetation on hydrodynamics and sediment transport. To date, the complex physical processes involving the combined effects of leafy flexible vegetation and mobile bedforms are not completely understood. Most sediment transport models have been developed for bare bed conditions so that their performance in the presence of leafy flexible vegetation remains unclear. On the other hand, recently developed models consider vegetated conditions but they typically account only for the presence of rigid cylinders and in some cases scour at their base. For this purpose, laboratory experiments were conducted with mobile dune bed conditions and artificial flexible plants with varying Leaf Area Index to investigate the effect of flexible vegetation on bed morphology and sediment transport. Sediment transport rates and bedform characteristics such as height, wavelength and celerity, were measured in specifically designed experimental runs. The collected data show that the presence of leafy vegetation alters bed morphology, tending to reduce the average dune wavelength and leading to the formation of complex 3D geometries. Bed-shear-stress-based models for predicting sediment transport were verified to be valid under conditions of low vegetation roughness density. On the contrary, the collected data emphasize that the measured bed-load transport rate increased in the presence of leafy flexible vegetation with higher frontal area. Recent bed-load models for vegetated channels provide a better interpretation for dense leafy vegetation but are less effective when predominant effects related to dunes are present.","PeriodicalId":23799,"journal":{"name":"Water Resources Research","volume":"10 1","pages":""},"PeriodicalIF":5.4,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142369929","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}

引用次数: 0