Dynamic calculation method for reducing peak flow of regulation and storage tank

Abstract

The invention discloses a dynamic calculation method for reducing peak flow of a regulation and storage tank, which can be used for obtaining the water level, the flow and the sectional area of a channel along-way section, the flow converging process of all channel sections and the water level process of a water body; a water storage volume and water storage increment process; the processes of thewater levels inside and outside the regulation and storage tank, peak flow reduction and the stock water amount and the condition of reducing the water level of the protected area, and providing thebasis for finally determining the scales of the channel, the water inlet overflow weir and the regulation and storage tank. According to the dynamic calculation method, the operation effect of settingthe rainwater and sewage storage tank in the channel or the pipeline can be dynamically calculated, and the operation effect of setting the flood storage area in the river channel can also be dynamically calculated.

Description

technical field [0001] This application relates to the scientific and technical field of air defense and disaster mitigation, and in particular to a dynamic calculation method for reducing peak flow in storage tanks. Background technique [0002] my country is a country with frequent flood disasters. In order to avoid flood disasters caused by heavy rains and utilize storm water resources, it is a good solution to set up storage tanks or flood diversion areas, and it is also an important measure to build a sponge city. The storage tank for peak flow reduction is mainly composed of storage tanks, channels, inlet overflow weirs and drainage gates (or pumping stations). The inflow overflow weir is located in the upstream section of the channel within the range of the storage tank, and its task is to divert the excess flow of the channel to the storage tank, so that the flow of the channel can be controlled within the safe flow range. The drainage sluice is located in the downs...

AI Technical Summary

Problems solved by technology

[0004] The current technology stipulates the weir crest elevation of the inflow overflow weir as the water level of the intercepted flow in rainy days, which may allow the non-excess flow to enter the storage tank or flood diversion area. There is no clear requirement to reduce the water level of the protected area as the service goal. Does not clearly reflect the lowering of the water level in the protected area, resulting in ambiguity about the contribution of storage tanks to flood control

For example, when a channel or pipeline is under the influence of the downstream receiving water body, the safe flow of the channel or pipeline will decrease accordingly, the excess flow will increase accordingly, and the water level of the channel or pipeline or the head of the piezometric tube will rise accordingly, so according to The volume calculated by the volume formula of the storage tank must be too small, resulting in poor use of the storage tank

Images