A sponge city test point area low-influence development facility simulation method

Abstract

The invention discloses a sponge city test point area low-influence development facility simulation method, which comprises the steps of establishing an overall background model of a test point area in a storm flood management model SWMM, and simulating a rainwater runoff total amount and a runoff peak value before sponge city construction; selecting a target source project in the test point area,utilizing a low-influence development facility simulation module in the SWMM model to input design parameters corresponding to different types of low-influence development facility LIDs in the targetsource project, establishing a project model of the target source project, and simulating a reduction result of the target source project on the total rainwater runoff amount and the peak value, wherein the target source project is generalized into a sub-catchment area in the area integral model; and according to the simulation result of the target source project in the project model, the basic parameters of the sub-catchment area corresponding to the target source project are calculated and adjusted through the parameters, so that the overall sponge city construction effect of the test pointarea is embodied in the area model. According to the method, in large-scale regional simulation, the accuracy of low-influence development facility effect simulation in a regional model is guaranteed.

Description

technical field [0001] This application relates to the technical field of simulation of low-impact development facilities, and in particular to a simulation method for low-impact development facilities in a sponge city pilot area. Background technique [0002] The core content of sponge city construction is to use low-impact development facilities and carry out sponge transformation of land-based projects. In the planning and design stage, it is necessary to use model simulation to evaluate whether the overall sponge renovation plan in the pilot area can achieve the expected goals; in the assessment and evaluation stage, key indicators such as the total annual runoff control rate also need to be calculated based on model simulation. Therefore, it is of great significance to establish a high-accuracy model within the scope of the pilot area that can truly reflect the effect of the low-impact development facilities used for the early planning and design, construction and later...

AI Technical Summary

Problems solved by technology

However, there are many parameters involved in using the LID editing module, and the scope of the sponge city pilot area is generally more than 20 square kilometers, and there are more than 100 sponge land projects, among which there are more LID facilities, each of which is added using the LID editing module The feasibility of low-impact development facilities is not strong, and the effect simulation of low-impact development facilities through the LID editing module is mainly suitable for the accurate simulation of various source plot projects. How to establish a SWMM model that can reflect the effects of various low-impact development facilities at the regional scale has not yet formed a unified Methodology

[0003] At present, the establishment of most regional-scale low-impact development facility models is realized by adjusting the parameters of the sub-catchment area, but there is a lot of blindness and uncertainty in the adjustment of the parameters. In the planning and design stage of the sponge city, there is a lack of necessary The actual monitoring data makes it difficult to calibrate and verify the model, which seriously affects the reliability of the model simulation results; The workload affects the efficiency of model building

In the evaluation of the sponge city, there are clear requirements for the monitoring of the sponge city, not only to monitor the key nodes in the region, but also to monitor the various source projects and facilities, but the current monitoring data has not played a role in the model establishment. In particular, the relatively refined monitoring and simulation of the source project failed to support the large-scale low-impact development facility effect simulation in the pilot area, which affected the relevance of monitoring and simulation at different levels

[0004] To sum up, at present, the intelligent management and operation of sponge cities in my country is still in the initial stage of exploration. Due to the unclear method of using the SWMM model to simulate the effect of LID use at the regional scale of the pilot area, and the lack of uniform standards, the results obtained by the model The accuracy is poor, which affects the reliability of the planning and design scheme of the sponge city project, and cannot fully support the assessment and evaluation of the sponge city

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