|
|
|
| Prediction of water erosion on purple soil slope based on WEPP model |
| Dai Hualong,Cao Shuyou,Liu Xingnian,Lei Xiaozhang |
| Mountainous Area's River Exploitation and Protection Laboratory of Sichuan University,610065,Chengdu,China |
|
|
|
|
Abstract Based on WEPP model,this paper evaluate the intensity of erosion on purple soil slope,advance methods to assess the model parameters and use long-term observation data which belongs to the station of soil and water conservation in the city of Suining in Sichuan Province,test precision and sensitive degree that forecasted in the model;discuss the possibility that the model be used to purple soil hilly area in mid Sichuan and the existent problems which would be brought in the model parameter choice.Applying WEPP model the erosion which was caused by rainfall was forecasted,then practical measure data were cpmpared.The result indicate that the data which were forecasted in the model was in reason most of the time,on low grade slope the forecasted data was higher than practical measure data,on high grade slope it was lower.Not only forecasted data were close with practical measure data,but also the model can estimate space-time distribution of the soil erosion,namely,it can estimate the changes in the completely quantity of soil and water loss on all or a random point on slope along with time,it is very important for the disposal of control measure in soil and water conservation.
|
|
Received: 18 January 2007
|
|
|
|
|
|
|
