The Green Landscapeevaluation Study To Chengdu Southern Hi-tech Zone Based On 3S Technology

The papar investigates and studies the spacial structure of urban greenland to Chengdu southern Hi tech Zone based on 3S technology , and establishes the greenland management information system , at the same time carry through the landscape diversity analysis , degree of dominance analysis , landscape fragmentation analysis , benefit evaluation etc. , meaning to provide basic data and reference for Chengdu Hi-tech Zone's integrated planning and green landscape arrangement . Through the research we can see that the green percentage , the virescence management level and management quality , the environment quality is improved obviously . But there are still many deficiencies :(1) comparing with the national Garden City standards the difference is great(2) The degree of landscape fragmentation, dimension and diversity index are high and the degree of dominance is low , the structure of plaque is simple .(3)green space structure is not very reasonablePublic green space and productive green space in the main urban zone is shortage, the structure of the internal woodland is not very reasonable ,trees selecting and arranging don't be well considered from the Space dimension, the ecological relationship between species, overground and underground, evergreen and deciduous, coniferous and laurisilvae, Pure and mixed, heliophilous species and shade species as well as zonation and regionality.(4)The landscape quality is lower and the ecosystem structure and function is not very reasonableLess abundance of lanscape,less scene, out of order of leaf canopy,Arrangement of Point, line, face, body, color, zone, network, ring is suboptimal . inadequate of green quantity, great difference between the plaque, shortage of landscape corridor connectivity . obscurity of the forest vertical stratification cause the vegetation can not take full advantage of the sun's nutrition space. the steady, self-regeneration and productive lanscape eco-system still has not formed.(5)Green space network connectivity is not highfrom the standpoint of the landscape ecology, the Green space network connectivity of Chengdu Hi-tech Zone is not high . cluster-like landscape of relative isolation distribute much,urban greening and Unit affiliated greening is difficult to connect.(6) The kinds of the species is rich , but the three-dimensional sense is not clear enough, and biomass andspecies diversity is not plentiful .Many kinds of species, but the three-dimensional sense is not clear enough. A large number of trees from elsewhere but local colour is introduced, less trees with Strong resistance, more fast-growing trees, unreasonable tree subrogation and combination, overall efficiency of species diversity is unsteady, urban rich artificial plant communities with structured ,density, scatterd and alterable is still not formed.(7) Design and management of urban green space is not enoughBecause of lacking deep understanding to phytoecology and overly going after emphasis on design and aesthetics, original unique vivid, plant protecting are neglected.