Abstract: In order to understand the flood control safety degree and flood discharge capacity of a tailings pond in a rainy area of Jiangsu Province, the local formula and general formula are used to calculate the flood control safety and flood discharge capacity of the tailings pond, and the safety reliability judgment is made. The results showed that the peak discharge and total flood amount calculated by the general formula method are both greater than those calculated by the local formula method. The tailings pond adopts the drainage tower-diversion well-drainage pipe system for flood discharge, which has better flood discharge capacity. The drainage system of the tailings pond could cope with a flood once every 200 years.

Key words: tailings pond, flood control safety, flood discharge capacity, flood routing