Study On The Planning Of Town Green Space System With Dense Water Network Based On The Theory Of Ecological Infrastructure

With the demand of upgrading in China's towns and villages,it is difficult to avoid the contradiction between economy and ecology in the process of development.Generally speaking,the ecological environment quality of small towns in China is not optimistic,and the effective measures to solve the environmental problems of small towns are to establish ecological priority and perfect green space system of small towns.Therefore,based on the theory of ecological infrastructure,this paper studies and plans the green space system of Qianku town with water network intensive,in order to provide reference for the green space system planning of small towns with water network intensive.The basic data of this study is the 2017 satellite image.The research process includes the following steps:first,the basic data is interpreted and extracted by using Arcgis 10.4,Envi 5.3 and other software to establish the green land database;second,according to the ecological characteristics and actual situation of Qianku Town,the green land is classified into water area,forest land,cultivated land,irrigated grassland,construction land and road use.Land and wasteland;Thirdly,through the methods of ecological sensitivity analysis,green space pattern analysis and water environment evaluation,the current situation of green space in Qianku town was evaluated and studied.Finally,the pattern and form of the green space system are determined,and elaborated by three scales of macro,meso and micro.The findings include:(1)ecological sensitivity analysis results:The results show that the area of high sensitive area,medium sensitive area,low sensitive area and no sensitive area in Qianku town are2.73hm~2,26.50hm~2,33.18hm~2 and 0.49hm~2 respectively,and they are divided into forbidden area and forbidden area.(2)analysis results of green space pattern:In Qianku Town,there are few types of green patches,the largest area of cultivated land,unstable structure,high fragmentation,simple shape and low diversity index of green space.Therefore,the strategies of increasing forest green area and optimizing green space structure are put forward.(3)analysis results of water environment assessment:According to water quality assessment,water green construction space with purification function and water safety protection shall be constructed in the vulnerable water area environment.The construction mode includes artificial wetland,artificial ecological revetment,ecological floating island and corresponding combination mode.(4)green space system planning based on the superposition of theory and analysis results:Taking macro scale as ecological framework,the spatial pattern of green space system is planned as"one piece,one core,two networks,three belts and many points".On the meso scale,the key project is to improve the living environment,to determine the basic framework of urban green space layout,and to put forward a control planning scheme based on park green space and subsidiary green space.On the micro scale,the specific construction scheme of ecological infrastructure green space model is proposed.