Study On Spatial Landscape Planning Of Tianjiahu Area In Tianjin From The Perspective Of Rain Regulation

Lakeside space is an open space with ecological function,which is composed of lake body and lakeshore.Lake body is an important storage and storage carrier of rainwater,and lakeshore is a carrier of rainwater purification.Lakeshore soil and plant roots can maintain soil,its natural depression during rainfall infiltration and purify rainwater storage,accumulation of dry when will the rain through the storage function covering lake,strewn at random have the plant landscape zone can guarantee the stability of natural ecological system have self-healing function,is the urban residents have access to one of the few natural ecological area.The object of this study is tianjia lake area in tianjin,which is a lake island residential area centered on the vast tianjia lake.The residential land and supporting public service land are distributed on the lake island and the shore,with the characteristics of long lake coastline and integration of water and land.The ecological landscape in the area depends on the greening of the lakeside.At the same time,the rainfall flows through the green space of the area,which will affect the ecological environment of the lake when it finally flows into the lake or is discharged by the pipeline to the tianjia lake body.This study is in ecological environment and ensure the lakeside area under the premise of respect for the status quo terrain,solve the lack of landscape water,rainfall,runoff,such key problems as the lake water quality deterioration,and proposes the rain covering the lake,peak regulation of rainwater,ecological purification of rain to regulate mentality,determine the lakeside area of rain to regulate landscape pattern.This paper is divided into three parts:The first part constructs the storm flood model and simulates and analyzes the runoff and pollution load.On the basis of understanding the current situation and existing planning of tianjiahu area,the typical land use proportion of the underlying surface was integrated and determined.The basic data was simulated by SWMM software to obtain the rule that the larger the recurrence period,the stronger the ability of rainfall to reduce the total amount of runoff and pollution load.The third part puts forward three typical landscape modes according to the difference of source,flow and end storage in sub-catchment area.According to the proportion of soft,hard and natural sites in the sub-catchment area and the relationship between the land and the lake,the research area is divided into three types of land: island residential land,block public building land and ring green land.By analyzing the functions of green space,it can be divided into three functions,namely,infiltration storage,transfer transportation and stagnation storage,and three typical landscape modes of sub-catchment area,which highlight the control of source,flow and end,can be obtained.Finally,the SWMM model is used to verify the rationality of the landscape planning scheme after the optimization of the storage facilities,soas to increase the persuativeness and scientificity of the research.The third part puts forward three typical landscape modes according to the difference of source,flow and end storage in sub-catchment area.According to the proportion of soft site,hard site and natural site and the relationship with lake water,the study area is divided into three types: island dwelling,block public building and ring green space.By analyzing the functions of green space,it can be divided into three functions,namely,infiltration storage,transfer transportation and stagnation storage,and three typical landscape modes of sub-catchment area,which highlight the control of source,flow and end,can be obtained.Finally,the SWMM model is used to verify the rationality of the landscape planning scheme after the optimization of the storage facilities,so as to increase the persuativeness and scientificity of the research.Based on the current hydrological characteristics and the existing planning scheme of tianjiahu area in tianjin,this paper combines the rainwater storage measures under the influence of runoff process with the spatial landscape planning and implements the typical spatial landscape pattern.The research results support the planning and construction of tianjiahu area and enrich the theoretical achievements of low-impact development of urban lakeside residential areas.