论文部分内容阅读
在小流域内建立人工径流试验小区和自然坡面径流试验小区,观测天然降雨条件下的土壤侵蚀现象、土壤侵蚀量和小流域出口治沟骨干工程的淤积量,并对小流域土壤侵蚀进行了分类。在特别界定小流域“坡面侵蚀”、“沟道侵蚀”和沟道“重力侵蚀”词语含义的基础上,建立起坡面侵蚀模数和沟道侵蚀模数的预报模型。该侵蚀预报模型具有较高的精度,适用于年降雨量为430mm左右的黄土丘陵沟壑区。
In the small watershed, artificial runoff experimental plots and natural slope runoff test plots were established to observe the phenomenon of soil erosion under natural rainfall, the amount of soil erosion and the siltation of the main drainage projects in small drainage basins. Soil erosion in small watershed was also studied classification. On the basis of defining the meanings of small watershed “slope erosion”, “channel erosion” and channel “gravity erosion”, the prediction of slope erosion modulus and channel erosion modulus model. The erosion prediction model has high precision and is suitable for the loess hilly and gully area with an annual rainfall of about 430mm.