Method and device for determining design rainfall

Abstract

The embodiment of the present invention provides a method and device for determining the design rainfall. The method includes obtaining the first type of rainfall collected by the rainwater collection and utilization system in each rainfall event; determining multiple design rainfalls, and obtaining The first-class net income of the rainwater harvesting and utilization system within the preset time period corresponding to each design rainfall; based on each design rainfall and the corresponding first-class net income, determine the corresponding first-class net income of each design rainfall A fitting curve between one type of net income, and the design rainfall corresponding to the largest first type of net income on the fitting curve is taken as the first target design rainfall. The embodiment of the present invention analyzes from the perspective of technology and economy, adopts the annual cost-benefit analysis method, determines the reasonable scale of the rainwater collection and utilization system according to the first target design rainfall, and can achieve the maximum benefit when the investment amount is fixed, and achieve the minimum investment. purpose of maximum output.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of rainwater utilization, and more specifically, to a method and device for determining a designed rainfall amount. Background technique [0002] With the continuous development of the economy, the shortage of water resources and the pollution of water environment are becoming more and more serious. It has become an important strategic task to carry out rational development, efficient resource utilization, effective protection and comprehensive management of water resources. Rainwater is an extremely valuable water resource, and it has become an inevitable trend to collect rainwater for reuse. At present, the method of collecting rainwater is usually to build a rainwater collection and utilization system in a fixed area, and collect rainwater through the rainwater collection and utilization system. [0003] To build a rainwater harvesting and utilization system, the storage tank i...

AI Technical Summary

Problems solved by technology

As the rainwater utilization rate is greater, the volume of the determined storage tank is larger. However, since the rainwater utilization rate is determined by the total amount, when it comes to each rainfall event, the rainfall of a certain rainfall event may be far less than The amount of rainfall that the storage tank can hold, which will lead to a higher cost per unit of water in the storage tank in a single rainfall event, which will affect the net income of the rainwater collection and utilization system and cause waste of resources

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