Method for determining design parameters of filler in bioretention tank

Abstract

The invention discloses a method for determining the design parameters of a filler in a bioretention tank. The method comprises the following steps: step 1, studying the influence of a rainfall returnperiod and a confluence ratio on the operation effect of the bioretention tank, and judging the water inflow, water outflow and overflow quantity to obtain optimal rainfall return periods and confluence ratios corresponding to fillers; step 2, compiling a series of calculation charts of the design parameters of the fillers based on the results of the first step; step 3, studying the relationshipbetween the heights of the fillers and the removal rates of pollutants via experiments; step 4, looking up the series of calculation charts of the design parameters of the fillers, selecting an appropriate filler and determining the area of the filler; and step 5, determining the height of the filler in the bioretention tank. According to the method, the influence of the rainfall return period andthe confluence ratio on the operation effect of the bioretention tank is studied, and the proper design parameters of each filler are determined and compiled into charts which can be looked up in thedesign process of the bioretention tank, so the design process of the bioretention tanks is standardized and simplified to a certain extent.

Description

technical field [0001] The invention relates to the technical field of sponge city rainwater treatment, in particular to a method for determining the design parameters of fillers in bioretention tanks. Background technique [0002] Urban stormwater runoff management is of great significance to solve the problems of urban water shortage, flood disaster, non-point source pollution, etc., and has received extensive international attention in recent years. It is one of the challenges facing urban management to explore how to manage urban stormwater runoff to meet the multiple benefits of environment, ecology, and economy. [0003] As one of the best management practices (BMPs) for urban stormwater, bioretention ponds are effective in controlling runoff water volume and water quality, and have a good purification effect on total suspended solids, heavy metals, and pathogenic bacteria in runoff rainwater. Detention facilities are flexible in application, not limited by the site, ...

AI Technical Summary

Problems solved by technology

At present, there are many studies on the purification performance and storage performance of fillers in bioretention tanks, but there is no complete system between the selection of fillers and design parameters such as rainfall return period, confluence ratio, and pollutant removal rate. The lack of certain norms and standards in the design process of the bioretention tank, and the design efficiency is low

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