Zero-discharge sponge urban rainwater system

Abstract

The invention discloses a zero-discharge sponge urban rainwater system. The rainwater system comprises a low-impact development system and a waterlogging prevention and control system; according to the low-impact development system, the rainwater recurrence period standard is selected through technical and economic comparison, rainwater of a land parcel is subjected to source dispersion, permeation, retention and storage through the system design, so that the purposes of organizing the rainwater and controlling the runoff are achieved; and the waterlogging prevention and control system comprises a rainwater overflow facility and a tail end regulation and storage facility, rainwater exceeding the recurrence period standard forms source overflow rainwater, and the source overflow rainwater is drained to the tail end regulation and storage facility through the rainwater overflow facility. According to the rainwater system, a traditional rainwater pipe network is replaced by a grey-green combined sponge facility, so that the construction cost is reduced; and the technical problems that a conventional sponge city is insufficient in runoff total amount control capacity, only medium and light rainfall events with high frequency can be controlled, and rainwater is still drained through a rainwater pipe canal system are solved, and finally zero rainwater drainage is achieved.

Description

technical field [0001] The invention relates to the technical field of sponge city rainwater systems, in particular to a zero-discharge sponge city rainwater system. Background technique [0002] The rainwater system of the sponge city follows the principle of ecological priority, combines natural means with artificial measures, and coordinates the low-impact development system, stormwater pipe system and excessive rainwater runoff discharge system, and realizes it through "seepage, stagnation, storage, purification, use, and drainage". The accumulation, infiltration and purification of rainwater in the plot promote the utilization of rainwater resources and the protection of the ecological environment. The total runoff control is usually selected as the primary planning control target for the construction of the sponge city stormwater system. When low-impact development facilities are designed with the total runoff as the control target, the facility scale is generally calc...

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a rainwater system for a zero-outflow sponge city to solve the technical problem that the conventional sponge city has insufficient control capacity for total runoff and can only control medium and small rainfall events with relatively high frequency, and still relies on the rainwater pipe system to discharge rainwater

Images