Study On The Planning Of Town Green Land Ecological Networks Based On Spatial Efficiency Taking Liqiao Township,Xuanzhou District As An Example

With the development of township economy,a series of problems such as urban and rural integration,overuse of land resources,deterioration of ecological environment,reasonable configuration of tourism resources and interests of the public green space and so on highlight the importance of township ecological construction in the process of current China’s economic and social rapid development.Based on the theoretical analysis of the space efficiency comprehensive research methods,this study focused on these problems in ecological network planning of township green space in China,taking Liqiao township in Xuanzhou city as an example.By the help of 3S technique such as ENVI 4.3 and ArcGIS software and information source of satellite image,the vector landscape graph of green space in study area has been made through the research steps such as the geometric correction of aerial images,field survey,green space information extraction and classification.On this basis,the index of landscape pattern characteristics have been calculated and analyzed respectively for three types of green land network subsystems such as ontology,efficiency and radiation zone by use of Fragstats3.3 and Excel statistical analysis software.The result is that the basic characteristics of the eight landscape types in the study area such as landscape pattern area,number and percentage has been described quantitatively.The ontology efficiency is moderate,different in region,and low in the verge area in the east and Northsouth.The ontology infiltration density can be more functional by the help of the extracting construction of key node and corridor.Secondly,on the research of green space ecological network ontology,this paper synthetically analyzes the three types of ecologically sensitive factors such as landscape type,construction and traffic land disturbing influence and receives five levels of spatial distribution of sensitive region in whom high sensitive region dominates in the Midwest and low sensitive region often connects with human being,and controllable and suitable class for construction and development has been decided.At same time,the ecologically sensitive degree and its spatial distribution have been taken as the cost surface to help for the ecological landscape with certain ecosystem service function as the source and then have generated the accumulative cost distance model with consideration of three ecological sensitivity factors such as landscape types,construction land and transportation disturbance of green space network ontology.By use of which the regional landscape pattern has been optimized and potential ecological corridors and nodes have been built in order to strengthen the spatial connectivity of regional ecological network.Finally,on the composition analysis of river,roadway and other landscape elements at current,the green space ecological network spatial pattern such as a core and a center,two wings in north and south,and the interaction both points and lines have been proposed and three scales of green space ecological network at macro,middle and micro space have been made respectively in order to enhance the whole spatial efficiency of township.