Research On Landscape Pattern And Ecological Network Optimization Of Green Space In Central City Of Jiayu County

Green space is the basic part in the ecosystem of a city, protecting the ecological security of the city and playing a vital role in maintaining the physical and mental health of residents. Scientific and reasonable urban green space ecological network can effectively improve the ecological landscape environment and the healthy development of the city. This paper studies the source of information is 2015 Jiayu County aerial image,combined with the data collected from the survey situation of Jiayu County,established by ENVI4.7 and ArcGIS10.2 software central city of Jiayu County urban green landscape database. Has been built based on the database, the calculation software of the landscape pattern of urban green space in Jiayu County central city is based on Fragstats4.2. By determining the ecological nodes and potential ecological corridor construction, proposing ecological green space network plan of the research area, and using α index, β index, γ index to measure the green ecological network plan, evaluation and provide suggestions from the macro scale construction of landscape in the research area of green landscape construction and ecological network. The major results are below:(1)The research area is divided into park green land, residential green land, public green land, road green land production green land, protection green land,other green plan.Other green land area is the largest, the smallest number of parks; plaque production green space and others accounted for relatively large. The green patches in research area is divided into small(less than 0.05hm2),medium (0.05～0.3hm2),medium large(0.3～1hm2)and large(more than 1hm2) four levels, medium large and large plays an important role in the central city of landscape ecological system.Green landscape plaque composition is still relatively reasonable that is not too broken.(2)The research area of other green and green production fragmentation to a lesser extent, while the number of road green plaques and scattered distribution. Residential area is small,and the degree of patch fragmentation is serious. The uneven distribution of all kinds of landscape has obvious difference, and the degree of landscape diversity is not high,and there is a positive spatial auto-correlation. Green landscape in space on is being a cluster distribution, better continuity, and higher aggregation degree.(3)By determining the ecological node and potential ecological corridor construction of central city of Jiayu green space network status, putting forward the green space network plan. By using α index, β index, γ index and other indicators to measure the green ecological network structure plan that between the nodes green ecological network planning.Multiloop network,perfect structure, has certain advantages in linear function and providing habitat for the species.