Study On Rainwater Management Measures Of Urban Park Green Space

Based on the increasingly serious urban rain and flood safety problem,this paper puts forward the significance of using park green space as the carrier of rainwater management,and the current situation in China,under the premise of constructing the sponge city system and promoting the construction of the sponge city system.The typical problem of rainwater management in park green space has emerged.Through the investigation of Tianjin park green space,it is found that the park green space lacks rainwater management facilities,the utilization rate of rainwater resources is low,the natural hydrological process is not considered in the planning process,and the sponge function in the surrounding area is not strong.These realities make the park green space,which is a “natural sponge”,unable to cope with the large-scale rainwater runoff caused by the relatively concentrated rainfall in Tianjin and the occurrence of heavy rain.This paper takes Tianjin urban park green space as the research object,combines the actual situation and analyzes,summarizes and summarizes on the basis of a large number of domestic and foreign successful cases and related theoretical research,trying to find the park green space rainwater management planning and design that can solve the urban rainwater problem.method.Firstly,through the combing of various rainwater management systems,the commonly used rainwater utilization technology facilities are classified according to the different stormwater runoff control objectives,and their functions,design points,limitations,and practical application cases are analyzed and summarized.Based on this,the applicability analysis and evaluation of rainwater technology facilities in Tianjin was carried out,and suggestions for improvement were put forward,which provided a comprehensive reference for the selection of Tianjin Park green space rainwater utilization technology facilities.Secondly,the stormwater management is fully integrated into the planning and design of the park green space,and the objectives,principles and a series of planning and design processes for the rainwater management of the park green space in Tianjin are proposed.The rainwater runoff generated from the interior of the park green space and the external sources introduced from the surrounding area are discussed to discuss the utilization mode,utilization route and technical measures of the storm water runoff.Finally,the internal runoff rainwater utilization design mode and the external runoff rainwater runoff are summarized.Design Patterns.In addition,the landscape of park green space is equally important.Therefore,the rain and flood design pattern combined with landscape elements is also explored,and the use of park green space to solve the problem of rainwater management in Tianjin is attempted.Finally,taking a park in Tianjin as an example,the park green space rainwater management measures introduced in the previous article were applied.The SWMM rainstorm management model was used to compare and evaluate the stormwater management in the study area using various technical facilities planning methods and not using various technical facilities planning methods.It was found that the rainwater was used after planning and design methods and appropriate technical facilities.The total runoff control,the peak rainwater runoff control and the rainwater runoff pollutant removal have obvious effects,which proves that this planning and design method is feasible to a certain extent,and provides ideas for the future planning and design of park green space rainwater management in China.