Management methods and countermeasures of soil and water loss zoning during construction period of pumped storage power station in red soil area of southern China

The complex terrain of the southern mountainous and hilly areas, the high rainfall erosion capacity of the red soil area and the high intensity of construction disturbance have aggravated the risk of soil erosion. In order to reduce the threat of soil erosion during the construction period of pumped storage power station to regional ecological security, a set of soil erosion zoning management method based on natural-engineering-management multi-element was proposed by relying on the implementation of zoning management of Yunfu Shuanshan Pumped Storage Power Station in the southern red soil area. This paper constructed an evaluation system including topographic slope, rainfall erosion force, construction disturbance intensity and so on, and combined the Revised Universal Soil Loss Equation (RUSLE) and GIS spatial analysis technology to realize dynamic risk simulation. The results of two rainy seasons of the pumped storage power plant showed that most of the erosion modulus of the high-risk area and very high-risk area had decreased by more than 95%, and all of the cycle of vegetation restoration had been shortened to 1.5 to 2.0 years, which verified the significant effect of zoning management in controlling soil erosion and promoting ecological restoration. This paper discussed in detail the soil erosion zoning management methods and countermeasures, which could provide a reference for pumped storage power plant projects to enhance ecological safety.