Journal ArticleDOI
An approach to estimating sediment transport capacity of overland flow
Li Wenjie,Danxun Li,XingKui Wang +2 more
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In this article, a new sediment transport capacity equation is proposed based on dimensional analysis and the coefficients of the new equation are calibrated using the published laboratory data, and rainfall impact is taken into consideration by adding an empirical factor on the dimensionless critical stream power.Abstract:
Estimating sediment transport capacity of overland flow is essential to the development of physically based soil erosion models. Correlation analysis indicates that stream power is a dominant factor for sediment transport in overland flows and a new sediment transport capacity equation is proposed based on dimensional analysis. The coefficients of the new equation are calibrated using the published laboratory data, and rainfall impact is taken into consideration by adding an empirical factor on the dimensionless critical stream power. The new sediment transport capacity equation is a function of stream power, rainfall impacted critical stream power and slope. The new equation is applied in a one-dimensional soil erosion model to simulate field data of a runoff plot and the simulation results are reliable.read more
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Parameters Derived from and/or Used with Digital Elevation Models (DEMs) for Landslide Susceptibility Mapping and Landslide Risk Assessment: A Review
TL;DR: Con conditioning factors related with topography are analyzed and the impact of resolution and accuracy of DEMs on these factors is discussed, and two factors or parameters are proposed for inclusion in landslide inventory list as a conditioning factor and a risk assessment parameter for future studies.
Journal ArticleDOI
Modelling sediment transport capacity of rill flow for loess sediments on steep slopes
TL;DR: In this article, a new approach for predicting sediment transport capacity (Tc) for loess sediments on steep slopes was proposed, and the results showed that Tc increased as a power function with flow discharge and slope gradient, with R2=0.99 and Nash-Sutcliffe model efficiency (NSE) = 0.99.
Journal ArticleDOI
Modeling of turbidity dynamics caused by wind-induced waves and current in the Taihu Lake
Journal ArticleDOI
Evaluation of shear stress and unit stream power to determine the sediment transport capacity of loess materials on different slopes
TL;DR: In this article, the authors evaluated the relationship between loess soil-based sediment transport capacity and the most well-known and extensively used shear stress and unit stream power for different steep slopes.
Journal ArticleDOI
Identifying sediment transport capacity of raindrop-impacted overland flow within transport-limited system of interrill erosion processes on steep loess hillslopes of China
TL;DR: In this paper, the authors used simulated rainfall experiments with rainfall intensities from 0.8 to 2.5mm min−1 over a three-area soil pan with slope gradients from 12.7% to 46.6% to identify the transport-limited cases and determine the sediment transport capacity by raindrop-impacted overland flow within the transport limited systems of interrill erosion processes.
References
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Journal ArticleDOI
A closed-form equation for predicting the hydraulic conductivity of unsaturated soils
van Genuchten,M. Th. +1 more
TL;DR: Van Genuchten et al. as mentioned in this paper proposed a closed-form analytical expression for predicting the hydraulic conductivity of unsaturated soils based on the Mualem theory, which can be used to predict the unsaturated hydraulic flow and mass transport in unsaturated zone.
Journal ArticleDOI
A Revised Land Surface Parameterization (SiB2) for Atmospheric GCMS. Part I: Model Formulation
Piers J. Sellers,David A. Randall,G. J. Collatz,Joseph A. Berry,Christopher B. Field,D. A. Dazlich,Changan Zhang,G.D. Collelo,Lahouari Bounoua +8 more
TL;DR: In this paper, a revised version of the Simple Biosphere model (SiB2) is presented, incorporating a realistic canopy photosynthesis-conductance model to describe the simultaneous transfer of CO2 and water vapor into and out of the vegetation, respectively.
Journal ArticleDOI
A Process-Based Soil Erosion Model for USDA-Water Erosion Prediction Project Technology
TL;DR: In this paper, a model was developed for estimating soil erosion by water on hillslopes for use in new USDA erosion prediction technology. Detachment, transport, and deposition processes were represented.
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