Study on the standard of soil erosion gradation based on erosive daily rainfall

2017 3rd International Conference on Energy, Environment and Materials Science

能源学;生态环境科学;材料科学

Li, Gang^1 ; Ye, Suigao^2,3 ; Shen, Zhaowei^2,3 ; Lu, Fangchun^2,3 ; Zhang, Jinjuan^2,3

Zhejiang Guangchuan Engineering Consulting Co., Ltd., China^1

Institute of Soil and Water Conservation, Zhejiang Institute of Hydraulics and Estuary, China^2

Zhejiang Provincial Key Laboratory of Hydraulics Disaster Prevention and Mitigation, China^3

关键词: Annual rainfall;    Daily rainfall;    Industry standards;    People's Republic of China;    Power functions;    Rainfall erosivity;    Standards for classification and gradation of soil erosions;    Water conservancy;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/94/1/012076/pdf
DOI  :  10.1088/1755-1315/94/1/012076

来源: IOP

【 摘 要 】

This paper took Yuyao city as the research area. the daily rainfall data of 30-year was collected from the typical rainfall station. And the daily rainfall power function model was used to calculate the rainfall erosivity. The weight that the rainfall erosivity of the rainfall less than 30mm accounted for the total annual rainfall erosivity was calculated and analyzed. A method for soil erosion intensity gradation based on daily rainfall was proposed. At the same time, according to People's Republic of China water conservancy industry standard "the standards for classification and gradation of soil erosion", the weight value was used to establish the gradation standard of soil erosion intensity. The daily soil loss tolerance was 7 t/km2 calculated by this method.