The Experts below are selected from a list of 288 Experts worldwide ranked by ideXlab platform
Ge Wu - One of the best experts on this subject based on the ideXlab platform.
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influence of soil aggregate characteristics on the Sediment Transport capacity of overland flow
Geoderma, 2020Co-Authors: Zhanbin Li, Suhua Fu, Lin Ding, Ge WuAbstract:Abstract The Sediment Transport capacity of overland flow is the core input variable of a process-based soil erosion model. Many studies have focused on the Sediment Transport capacity for overland flow; however, few studies have explored the relationship between Sediment Transport capacity and soil aggregate characteristics. The objective of this study was to investigate the effects of soil aggregate characteristics on the Sediment Transport capacity of overland flow. The unit flow discharge ranged from 0.68 × 10−3 m2 s−1 to 5.41 × 10−3 m2 s−1, and the slope gradient varied from 5.24% to 26.80%. Five types of typical Chinese soil were investigated. The results showed that the best correlation was the relationship between the Sediment Transport capacity and the mass percentage of aggregates greater than 0.25 mm (WSA0.25) under the Le Bissonnais method of wetting stirring conditions. Sediment Transport capacity was not correlated to the other soil aggregate characteristics, including the mean weight diameter (MWD) under the Le Bissonnais method of fast wetting and slow wetting conditions and the Yoder method, the degree of aggregation (A), and the fractal dimension (D) under the Yoder method. New equations including WSA0.25 were developed to predict the Sediment Transport capacity. The equation including flow discharge, slope gradient and WSA0.25 provided the best accuracy for predicting Sediment Transport capacity. The Sediment Transport capacity increased linearly with the mean flow velocity. Between the hydraulic variables of shear stress and stream power, our results showed that stream power was an optimal predictor for calculating Sediment Transport capacity. These findings offer a new approach for predicting the Sediment Transport capacity of overland flow.
Suhua Fu - One of the best experts on this subject based on the ideXlab platform.
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influence of soil aggregate characteristics on the Sediment Transport capacity of overland flow
Geoderma, 2020Co-Authors: Zhanbin Li, Suhua Fu, Lin Ding, Ge WuAbstract:Abstract The Sediment Transport capacity of overland flow is the core input variable of a process-based soil erosion model. Many studies have focused on the Sediment Transport capacity for overland flow; however, few studies have explored the relationship between Sediment Transport capacity and soil aggregate characteristics. The objective of this study was to investigate the effects of soil aggregate characteristics on the Sediment Transport capacity of overland flow. The unit flow discharge ranged from 0.68 × 10−3 m2 s−1 to 5.41 × 10−3 m2 s−1, and the slope gradient varied from 5.24% to 26.80%. Five types of typical Chinese soil were investigated. The results showed that the best correlation was the relationship between the Sediment Transport capacity and the mass percentage of aggregates greater than 0.25 mm (WSA0.25) under the Le Bissonnais method of wetting stirring conditions. Sediment Transport capacity was not correlated to the other soil aggregate characteristics, including the mean weight diameter (MWD) under the Le Bissonnais method of fast wetting and slow wetting conditions and the Yoder method, the degree of aggregation (A), and the fractal dimension (D) under the Yoder method. New equations including WSA0.25 were developed to predict the Sediment Transport capacity. The equation including flow discharge, slope gradient and WSA0.25 provided the best accuracy for predicting Sediment Transport capacity. The Sediment Transport capacity increased linearly with the mean flow velocity. Between the hydraulic variables of shear stress and stream power, our results showed that stream power was an optimal predictor for calculating Sediment Transport capacity. These findings offer a new approach for predicting the Sediment Transport capacity of overland flow.
Peter Nielsen - One of the best experts on this subject based on the ideXlab platform.
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shear stress and Sediment Transport calculations for swash zone modelling
Coastal Engineering, 2002Co-Authors: Peter NielsenAbstract:It is shown that the observed difference in Sediment Transporting efficiency by the swash uprush, compared with the downrush, could be mainly due to greater bed shear stress for a given velocity in the more abruptly accelerated uprush. The bed shear stress generated by an arbitrary free stream velocity time series is modelled in terms of usual wave boundary layer models plus a phase lead (phi(tau) of the bed shear stress compared with the free stream velocity at the peak frequency. With this approach, the total Transport amounts in uprush and downrush can be modelled satisfactorily with the same Sediment Transport formula, without the need for different uprush and downrush coefficients. While the adaptation of Sediment Transport formulae from steady flow can thus lead to the right total amounts of Sediment moved by this method, the timing of the instantaneous Sediment Transport rates are probably not accurately modelled due to the highly unsteady nature of the swash and the presence of pre-suspended Sediment in the uprush. Nevertheless, the proposed method is a useful intermediate step before we have a complete understanding of Sediment Transport under very rapid accelerations and of the relative contribution of pre-suspended Sediment to the onshore Sediment Transport in swash zones. (C) 2002 Published by Elsevier Science B.V.
Zhanbin Li - One of the best experts on this subject based on the ideXlab platform.
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influence of soil aggregate characteristics on the Sediment Transport capacity of overland flow
Geoderma, 2020Co-Authors: Zhanbin Li, Suhua Fu, Lin Ding, Ge WuAbstract:Abstract The Sediment Transport capacity of overland flow is the core input variable of a process-based soil erosion model. Many studies have focused on the Sediment Transport capacity for overland flow; however, few studies have explored the relationship between Sediment Transport capacity and soil aggregate characteristics. The objective of this study was to investigate the effects of soil aggregate characteristics on the Sediment Transport capacity of overland flow. The unit flow discharge ranged from 0.68 × 10−3 m2 s−1 to 5.41 × 10−3 m2 s−1, and the slope gradient varied from 5.24% to 26.80%. Five types of typical Chinese soil were investigated. The results showed that the best correlation was the relationship between the Sediment Transport capacity and the mass percentage of aggregates greater than 0.25 mm (WSA0.25) under the Le Bissonnais method of wetting stirring conditions. Sediment Transport capacity was not correlated to the other soil aggregate characteristics, including the mean weight diameter (MWD) under the Le Bissonnais method of fast wetting and slow wetting conditions and the Yoder method, the degree of aggregation (A), and the fractal dimension (D) under the Yoder method. New equations including WSA0.25 were developed to predict the Sediment Transport capacity. The equation including flow discharge, slope gradient and WSA0.25 provided the best accuracy for predicting Sediment Transport capacity. The Sediment Transport capacity increased linearly with the mean flow velocity. Between the hydraulic variables of shear stress and stream power, our results showed that stream power was an optimal predictor for calculating Sediment Transport capacity. These findings offer a new approach for predicting the Sediment Transport capacity of overland flow.
Lin Ding - One of the best experts on this subject based on the ideXlab platform.
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influence of soil aggregate characteristics on the Sediment Transport capacity of overland flow
Geoderma, 2020Co-Authors: Zhanbin Li, Suhua Fu, Lin Ding, Ge WuAbstract:Abstract The Sediment Transport capacity of overland flow is the core input variable of a process-based soil erosion model. Many studies have focused on the Sediment Transport capacity for overland flow; however, few studies have explored the relationship between Sediment Transport capacity and soil aggregate characteristics. The objective of this study was to investigate the effects of soil aggregate characteristics on the Sediment Transport capacity of overland flow. The unit flow discharge ranged from 0.68 × 10−3 m2 s−1 to 5.41 × 10−3 m2 s−1, and the slope gradient varied from 5.24% to 26.80%. Five types of typical Chinese soil were investigated. The results showed that the best correlation was the relationship between the Sediment Transport capacity and the mass percentage of aggregates greater than 0.25 mm (WSA0.25) under the Le Bissonnais method of wetting stirring conditions. Sediment Transport capacity was not correlated to the other soil aggregate characteristics, including the mean weight diameter (MWD) under the Le Bissonnais method of fast wetting and slow wetting conditions and the Yoder method, the degree of aggregation (A), and the fractal dimension (D) under the Yoder method. New equations including WSA0.25 were developed to predict the Sediment Transport capacity. The equation including flow discharge, slope gradient and WSA0.25 provided the best accuracy for predicting Sediment Transport capacity. The Sediment Transport capacity increased linearly with the mean flow velocity. Between the hydraulic variables of shear stress and stream power, our results showed that stream power was an optimal predictor for calculating Sediment Transport capacity. These findings offer a new approach for predicting the Sediment Transport capacity of overland flow.
