Study On The Differentiation Patterns Of WuHan Urban Park Plaques Based On Three-Dimension Green Quantity

At present, There has been great progress in the park plants planning and other theories of eco-efficiency, but most of these studies are based on the theory of qualitative analysis, a small number of quantitative research are workload, impact of environmental differences and other defects, and most of the theoretical study and professional preparation of specifications for the park and the planning are difficult to operate. For different species, the hierarchy of community in theory to us in the green structure made certain significance, but the actual operation is difficult to quantitative comparison with green quantity. Therefore, this thesis to the amount of city parks start to green quantity, based on community structure, research on urban parks different plant communities and green quantity of associated, the green quantity differentiation patterns of parks green plaque. On the planning of park green space, organization of activity space, to be more directly and more valuable guide. The main results are as follows:(1) The results of cluster analysis of Leaf area in different communit structure are: single-layer structure (pure trees, pure shrubs, pure herbs) are incorporated into a simple structure of communities; double layer (shrub-grass, the natural treed and herbs, artificial tree and herbs, treed and shrub),The three-tier structure (trees brushes and herbs, artificial brushes and herbs) and multilayer structure are incorporated into complex multi-layer structure; grassland into a separate category.(2) The results show that LAI general inversion model is better than the classification inversion, which the general LAI-VI curve estimation equation: Exponential model y=2.6171* exp (2.4252x) (R2=0.700); Category inversion: complex multi-layer structure LAI-VI curve estimation equation was:Exponential model y=2.6755*exp (2.3932x) (R2=0.688), simple structure LAI-VI curve estimation equation: Quadratic model y=2.6890+5.9917 x+4.7501 x2 (R2=0.702).(3)By measuring the LAI threshold value, promote communities structure of anti-NDVI classification threshold, so the complex community structure of NDVI threshold is 0.24, the simple community structure is 0.11. Then combined with unsupervised classification, separation of hard and water, then by the superposition, it can get effective to classificate out community structure from SPOT5.(4)Combined with the communities distribution features of different types of parks in Wuhan City, analyzed and summarized the distribution characteristics of different community structure within the parks, Green Quantity characteristics of different types of parks, this can be a basis for future urban planning and Green Quantity improved; Based on the distribution of Green Quantity plaque, which puts forward relevant measures for improving Green Quantity of urban parks.