Karst cave overflowing capacity calculation method and device based on flood regulation calculation and storage medium

Abstract

The invention relates to the technical field of hydrogeology, in particular to a karst cave overflowing capacity calculation method and device based on flood regulation calculation and a storage medium. The method comprises steps of conducting historical flood investigation on the karst cave entrance, and determining the recurrence period N, the flood mark elevation H1 and the submerging duration T of historical flood based on the investigation; calculating a karst cave storage capacity curve; preliminarily drawing up a karst cave drainage curve according to the karst cave storage capacity curve; performing trial calculation based on flood regulation calculation, and continuously adjusting the karst cave drainage curve until the water level elevation obtained by the flood regulation calculation is consistent with the flood mark elevation H1 of the historical flood and the submerging time is T hours; and outputting the drainage capacity of the current karst cave drainage curve as the karst cave overflowing capacity. By means of the method, the design flood newly built in the downstream reach reservoir can meet the requirement. While the dam break risk of the reservoir is avoided, overlarge scale and overlarge investment of the reservoir are prevented.

Description

technical field [0001] The invention relates to the technical field of hydrogeology, in particular to a method, device and storage medium for calculating flow capacity of karst caves based on flood control calculations. Background technique [0002] In Southwest China, karst is developed, and there are many karst caves and springs. The inflow of a large number of rivers is composed of the runoff of its own surface rainwater collection area and the inflow of springs. Most of the water coming from the spring comes from the surface runoff of the outer basin, passes through the karst cave, enters the underground river for a while, and then flows out through the spring. The flow of springs is generally relatively stable and the water quality is good, which is a kind of precious water resources. In order to make full use of the water resources in the basin and other basins and meet the water demand of local residents for life, production and agricultural irrigation, a regulating ...

AI Technical Summary

Problems solved by technology

[0003] Long-term flow observation data can be established by building a weir downstream of the cave outlet for the inflow of spring water. However, due to the flood detention effect of the cave, it is difficult to obtain the flood peak flow under heavy rain conditions, making it impossible to pass through the reservoir dam site. Conventional storm flood or hydrological comparison method reasonably determines the design flood, resulting in the design flood of the dam site being too small (without considering the flood of the rainwater collection area controlled by the outer watershed) or too large (simply superimposed the flood of the rainwater collection area controlled by the outer watershed)

The former may cause the risk of reservoir dam failure; the latter may lead to an oversized reservoir and increase investment

Images