Urban river network waterlogging prevention optimal scheduling method

Abstract

The invention relates to an urban river network waterlogging prevention optimal scheduling method. The method comprises the steps that basic data of all rainwater sub-catchment-areas on the upstream of an urban river network are acquired, SWMM models are constructed correspondingly, rainfall runoff simulation is conducted by inputting rainfall hydrographs, and discharge curves of rainwater pipe network drainage ports of all the sub-catchment-areas are acquired; basic data of an urban river network system is acquired, a river network SWMM model is constructed, the discharge curves, of the drainage ports, acquired in S1 are taken as inflow of the river network model, and the model is used for calculating a system overflow amount and a river and lake water level hydrograph under a specific scheduling strategy; a river network system waterlogging prevention optimal scheduling model is constructed, which comprises an optimized objective function and a decision variable, and optimization isconducted on the decision variable on the basis of a differential evolution algorithm; and coupling of the optimal scheduling model based on the differential evolution algorithm and the SWMM model isrealized in a Python environment, and an optimal waterlogging prevention scheduling strategy of a river network system is iteratively calculated. The method is good in robustness and high in reliability, and the obtained scheduling strategy is beneficial to exerting the regulation and storage capacity of the urban river network system in urban inland inundation.

Description

technical field [0001] The invention belongs to the technical field of urban waterlogging prevention, and relates to an optimal scheduling method for urban river network waterlogging prevention based on SWMM (Storm Water Management Model, storm water management model) model and differential evolution algorithm. Background technique [0002] In recent years, frequent waterlogging disasters have caused heavy damage to many cities. Urban rainwater drainage system, as a channel for urban runoff collection and discharge, is the key to urban waterlogging prevention. In order to alleviate urban waterlogging caused by extreme rainfall events, many measures (such as pipe network reconstruction and expansion) and methods (such as optimal scheduling) have been widely used. Compared with the reconstruction and expansion of the pipeline network, optimal dispatching is obviously a more economical and easier way to alleviate waterlogging by optimizing the operation of gates and pumping st...

AI Technical Summary

Problems solved by technology

On the contrary, if the operation is improper, the water level of lakes and rivers will rise during heavy rains, flooding the outlets of the pipe network around the lake and on both sides of the river, resulting in a decrease or even loss of drainage capacity of the pipe network, which in turn will cause waterlogging and cause serious losses

[0004] On the other hand, the existing scheduling methods for urban rainwater systems are mostly based on fixed control strategies, which are usually determined by professionals based on historical operating conditions

There are many problems in this empirical scheduling method, which is not conducive to giving full play to the urban river network's ability to regulate and store waterlogged water

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