Sponge-type comprehensive pipe gallery hydrological effect evaluation method

Abstract

The invention discloses a sponge type comprehensive pipe gallery hydrological effect evaluation method. The method comprises the steps of obtaining basic data of a research area; constructing an SWMMmodel according to the basic data of the research area, and obtaining hydrological effects under a traditional development scene and a traditional comprehensive pipe gallery scene according to the SWMM model; constructing an SUSTAIN model according to the basic data of the research area, and obtaining an LID optimization layout scheme through the SUSTAIN model; inputting the LID optimization layout scheme into an SWMM model, and performing hydrological simulation on the low-impact development facility scene and the sponge type comprehensive pipe gallery scene through the SWMM model to obtain hydrological effects under the low-impact development facility scene and the sponge type comprehensive pipe gallery scene; and comparing and evaluating the hydrological effects of the four scenes to obtain a hydrological effect evaluation result under the sponge-type comprehensive pipe gallery scene. According to the invention, accurate hydrological simulation and hydrological effect evaluation ofthe sponge type comprehensive pipe gallery scene can be achieved, and a reference basis is provided for planning, design and construction work of sponge cities in the future.

Description

technical field [0001] The invention relates to the technical field of hydrology and water resources, in particular to a hydrological effect evaluation method of a sponge-type comprehensive pipe gallery. Background technique [0002] Global warming has led to frequent occurrence of extreme rainfall events. In addition, the rapid expansion of urbanization has led to drastic changes in the underlying surface and a sharp increase in surface yield and flow. However, the planning and construction of flood control and drainage measures in many cities have insufficient consideration of the above issues, thus Leading to frequent urban waterlogging, resulting in huge social and economic losses and casualties. China's research on urban waterlogging started relatively late, and many measures have been taken to deal with urban waterlogging, but the results have been very limited. Since the concept of "sponge city" construction was put forward in 2013, research related to "sponge city" ...

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Problems solved by technology

At present, the SUSTAIN model is widely used, but for large areas, in order to reduce the operating load of the SUSTAIN model, it is necessary to substantially generalize the sub-catchments and pipe networks, and its simulation accuracy needs to be improved

[0004] In addition, many studies have shown that low-impact development facilities can effectively store stormwater, but the effect on reducing runoff is weak under extreme rainfall conditions; while underground drainage systems based on the "quick drainage" model can quickly drain away rainwater, but currently The design standards of pipelines are generally low, resulting in waterlogging in every heavy rain

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