海绵城市径流控制模型研究

Study on Runoff Control Model of Sponge City

通过模型可以精细化地计算海绵城市的核心指标--年径流总量控制率,但建立模型时需要关注其参数、边界,并对概化以及率定进行相应的规范化。为此,在建模过程中,对降雨序列长短、步长影响以及模型概化过程中的管网考虑进行了分析,同时比较了渗透速度、不透水率、硬化面积收集率、蒸发量的不同设置方式等建模敏感参数,并对率定方式进行了初步探索。所归纳出的结论可为其他海绵城市径流模型搭建提供借鉴。

The annual total runoff l control rate-the core index of sponge city can be elaborately calculated through the model.However,the establishment of the model needs to pay attention to the parameters and boundaries,and the generalization and rate determination are relevantly normalized.Therefore,in the modeling,the influences of rainfall sequence length and step length as well as the pipe network in the model generalization are considered to analyze.At the same time,the sensitive modeling parameters of permeability rate,impermeability,hardening area collection rate and different settings of evaporation are compared.The rate determination method is preliminarily explored.The conclusion can provide the reference for the establishment of runoff control models in the other sponge cities.