Calculation method, device and storage medium for overcurrent capacity of karst cave based on flood control algorithm

Abstract

The invention relates to the technical field of hydrogeology, in particular to a method, a device and a storage medium for calculating the flow capacity of a karst cave based on flood control calculation. Carry out historical flood investigation at the entrance of the cave, and determine the return period N and flood mark height H of the historical flood based on the investigation 1 Calculate the karst cave storage capacity curve; preliminarily draw up the karst cave discharge curve based on the karst cave storage capacity curve; carry out trial calculations based on the flood control calculation, and continuously adjust the karst cave discharge curve until the water level and the historical flood traces obtained by the flood control calculation Elevation H 1 Consistent, and the submerged time is T hours; the discharge capacity of the discharge curve of the cave at this time is output as the flow capacity of the cave. This method can make the design flood of the newly built reservoir in the downstream reach meet the demand. While avoiding the risk of reservoir dam failure, prevent the reservoir from being too large and investing too much.

Description

technical field [0001] The invention relates to the technical field of hydrogeology, in particular to a method, a device and a storage medium for calculating the flow capacity of a karst cave based on flood control calculation. Background technique [0002] Karst is developed in the southwest region, and there are many karst caves and springs. The inflow of most rivers is composed of the runoff from its own surface rainwater collection area and the inflow of springs. Most of the water coming from the spring comes from the surface runoff from the outer basin, passes through the karst cave and enters the underground river for a short time, and then flows out through the spring. The spring flow is generally stable and the water quality is better, which is a precious water resource. 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 daily production and agricultural irrigation, a new storage reservoir ...

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

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