Comparison of two occurrence risk assessment methods for collapse gully erosion ——A case study in Guangdong province

3rd International Conference on Advances in Energy Resources and Environment Engineering

能源学;生态环境科学

Sun, K.^1,2 ; Cheng, D.B.^2 ; He, J.J.^1 ; Zhao, Y.L.^2

Huazhong Agricultural University, Resource and Environmental College, Wuhan

430070, China^1

Changjiang River Scientific Research Institute, Wuhan

430010, China^2

关键词: Analysis method;    Guangdong Province;    Information acquisitions;    Logistic regression analysis;    Red soil region of southern chinas;    Regional scale;    Risk assessment methods;    Risk distribution;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/113/1/012209/pdf
DOI  :  10.1088/1755-1315/113/1/012209

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Collapse gully erosion is a specific type of soil erosion in the red soil region of southern China, and early warning and prevention of the occurrence of collapse gully erosion is very important. Based on the idea of risk assessment, this research, taking Guangdong province as an example, adopt the information acquisition analysis and the logistic regression analysis, to discuss the feasibility for collapse gully erosion risk assessment in regional scale, and compare the applicability of the different risk assessment methods. The results show that in the Guangdong province, the risk degree of collapse gully erosion occurrence is high in northeastern and western area, and relatively low in southwestern and central part. The comparing analysis of the different risk assessment methods on collapse gully also indicated that the risk distribution patterns from the different methods were basically consistent. However, the accuracy of risk map from the information acquisition analysis method was slightly better than that from the logistic regression analysis method.