Rainwater regulation and storage tank volume design method based on pollutant interception quality simulation

Abstract

The invention discloses a rainwater regulation and storage tank volume design method based on pollutant interception quality simulation, which comprises the following steps: simulating pollutant quality and water quantity by using SWMM simulation software, and solving the volume of initial rainwater containing pollutants in a flow and time change curve by integration to determine the volume of theregulation and storage tank. By means of the technical scheme, scientific interception of pollutants in initial rainwater is achieved, and the problems that pollutants cannot be intercepted in time when the regulation and storage tank is too small and the regulation and storage tank is too large to waste are solved. In the recurrence period before the pollutant stable recurrence period Pw, it canbe considered that the storage tank can contain pollutants washed by the storage tank due to small rainfall; although the rainfall capacity is greatly increased in the recurrence period after the stable recurrence period Pw of the pollutants; the larger the recurrence period is, the shorter the flushing time of the pollutants is, and the shorter the time for the larger the recurrence period to enter the regulation and storage tank is when the volume of the regulation and storage tank is fixed, so that the pollutants are flushed completely even if the recurrence period is increased and the regulation and storage tank is full.

Description

technical field [0001] The invention relates to the technical field of calculating the volume of a rainwater storage tank, in particular to a method for calculating the volume of a rainwater storage tank based on runoff pollution control and applied to a split-flow rainwater drainage system. Background technique [0002] At present, for the design method of diversion system rainwater storage tanks used to control the pollution function of rainfall runoff, the calculation methods that are widely used and have great influence are mainly empirical formula method and model calculation method. If hydrological models were used, the resulting scheme would be more accurate, but there are no simple guidelines that are applicable. The public test for the calculation of runoff pollution control storage tanks recommended by my country in the "Outdoor Drainage Design Code" is in the form of empirical formulas. Its advantages are simple and practical, requires less data, and has a wide ra...

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Problems solved by technology

[0003] In order to solve the problems existing in the prior art, the present invention provides a method for designing the volume of rainwater storage tanks based on the simulation of the intercepted quality of pollutants, so as to solve the problem of the adjustment and storage volume of important parameters in the calculation of the volume of rainwater storage tanks in the prior art. The value is highly subjective and the design is inaccurate, resulting in the problem that the storage tank is too large and wasteful or the pollutants cannot be intercepted in time if it is too small

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