GIS-based Ecological Evaluation Of Urban Greenbelt Landscape

Combining GIS technology with the principles and methods of landscape ecology, establishthree streets of Dandong, Danxi and Juexi green landscape Geographic Information System inorder to provide directions for future urban green planning, construction, renovation inXiangshan. Using of Fragstats3.3, the evaluation of three street’s landscape pattern is asfollows:(1) The study area is divided into eight types of scenic woodland landscape, parkland,protective green land, residential green land, public building green space, traffic greenbelt,agricultural green land and other Greenland. The green land of the three streets was:3057.105hm~2,2308.612hm~2,1758.366hm~2. The green land rate of Dandong subdistrict is72.41%, Thegreen land rate of Danxi subdistrict is66.36%, the green land rate of Juexi subdistrict is77.20%.(2) There are significant differences in various types of greenland of three subdistrict in the studyarea. Woodland landscape and agricultural green land are big patch. Parkland,residential greenland and public building green land are small patch. The greenbelt level of protective Greenlandis medium-size.(3) The level of fragmentation are closely related to the Green function, such as agriculturalwhich main function is production has the lowest level of fragmentation in the study area. Thelevel of fragmentation of Dandong subdistrict is woodland landscape>residential green land>public building green space,>traffic greenbel> agricultural green land>parkland>protectivegreen land. The level of fragmentation of Danxi subdistrict is woodland landscape> residentialgreen land> public building green space,>traffic greenbel>parkland>protective green land>agricultural green land. The level of fragmentation of Juexi subdistrict is residential green land>woodland landscape> public building green space,>traffic greenbelt>>parkland>protectivegreen land>agricultural green land.(4) In the space relationship analysis, the ENN_MN of woodland landscape and agriculture greenland is much higher, and the solitary of other green land types is much lower, parkland andprotective green land are followed. The ENN_MN of traffic greenbelt and residential green landis much lower. The ENN_MN level of three subdistrict in landscape areDangdong>Danxi>Juexi. (5) The three subdistrict performance a high degree of aggregation, the AI maintained to about90%. High aggregation green play an beneficial effects on the green eco-environmental.(6) In moving window and buffer in the range of500and1000meters analysis, Dandong andDanxi subdistrict has a higher green buffer and Juexi is lower buffer. So Dandong subdistrict andDanxi subdistrict have a higher level of reachability, and the level of reachability is lower inJuexi subdistrict.