基于WEPP模型的紫色土坡面水蚀预报

应用水蚀预报项目（Water Erosion Prediction Project，WEPP）模型评价紫色土坡面水蚀强度，提出模型参数的估算方法，并利用四川省遂宁水土保持试验站长期径流小区观测资料，验证和检验模型预测的精度和敏感性；探讨该模型在川中丘陵紫色土地区应用的可能性及模型参数选择存在的问题。运用WEPP模型进行降雨侵蚀预测，并与实测值进行比较。结果表明，WEPP模型在大多数情况下预报值较合理，低坡度坡面上模拟预测值高于实际观测值，高坡度坡面上模拟预测值低于实际观测值，不仅在一定程度上模拟值与实测值接近，而且模型还可估算土壤侵蚀的时空分布及全坡面或坡面任意一点的净土壤流失量及随时间的变化。这对布置水土保持管理措施具有重要意义。

Prediction of water erosion on purple soil slope based on WEPP model

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 ...