| Urban green space is urban land endowed with certain function, and it based on natural andartificial vegetation and supporting facilities as the main contents. Scientific and rational urban greenspace landscape layout can improve the urban ecological environment and landscape environment, italso conducive to the sustainable development of the city. The article is based on the2009aerial imagesas the main source of information, combined with the data of Changhe town and the application of RSand GIS technology, through using the software as ENVI4.3and ArcGIS9.3to create green spacelandscape types sdatabase.On this basis, using the landscape pattern calculation software such asFragstats3.3to have a landscape pattern characteristics calculation and analysis about green spacelandscape structure of Changhe town, and then, ecological networks are designed.In order to exploregreen space landscape pattern of Changhe town in the perspective of landscape ecology, and it also canprovide scientific basis to the building and optimization green space system of landscape pattern andecological network of Changhe town. The conclusion is as follows:(1) The total area of Changhe town is2731hm2, a total area of green landscape in Changhe townis1517.24hm2. The green space of Changhe town is divided into seven classes, they are park greenspace, production green space, protective green space, residential green space, road green space, publicconstruction green space and other green space. Total number of green space plaques is6329pieces inChanghe town, production green space and other green space have a significant proportion ofproduction. And green space in various scales patch level is distribute imbalance, there are mainlysmall patches of every green space.(2) The overall fragmentation degree of green space landscape patches is high in Changhe town.The fragmentation degree of road green space and residential green space is more serious, but thefragmentation degree of production green space is lower than others. Green patch fractal dimension isbetween1.0822and1.3488, it shows that green space landscape patch shape in Changhe town is simpleand regular, and it is disturbed relatively serious by human beings. The patch shape index of park greenspace is the smallest in all types of green space, the overall index analysis shows that green spacelandscape of Changhe town is disturbed serious by human beings. Largest patch index of productiongreen space is largest, it has a significant advantage in various green land patches.(3) Shannon’s diversity index (SHDI) of green space landscape in Changhe town is0.4765,Shannon’s evenness index of green space landscape (SHEI) is0.2448, patch richness density (PRD) is0.4614. Landscape diversity index shows that green space landscape of Changhe town is unevendistribution, the position of various green space landscape exists obvious difference, and it has a lowlevel of green space landscape diversity and richness degree. In microcosmic spatial relationships,Euclidean nearest neighbor distance (ENN) of every green space landscape in Changhe town is lessthan35meters in addition to the park green-land, it reflects that the green space landscape in the studyarea has the well continuity, and concentration of all kinds of green space landscape is high. (4) Based on the corridor structure and network structure analysis of four different ecologicalnetwork plans, it and the degree of network connection than other two plans after syntheticallycomparing. Considering about the cost ratio and the actual construction and use of ecological network,finally it is concluded thafinds the third and the forth network plans have better network closure,corridor network connectivity t the forth network plan is the ecological and optimization networkscheme of Changhe town. Based on the present situation of green space landscape pattern andecological network optimization plan in Changhe towe to projecte the green space system structure.Eventually the reasonable green space layout is constituted. |
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