The Small-Scale Ecological Function Zoning Based On Evaluation Of Ecological Functions

Ecological environment is not only the basis of human existence, but also the necessary prerequisite of economic development and social progress. In the long-term of economic development and social progress, people chose the regional development orientation and development mode just from the traditional view of economic and society, which has brought a series of ecological and environmental problems to entironment and resource exploitation. It also has become a serious threat to human existence and has affected the quality of life and living standard of people. With the harmonious society to be projected, how to establish harmony between human and environment, and how to locate the regional development orientation from the view of economic, society and ecology have been paid much attention by many academics and managers. Large-scale national ecological function zoning work has been completed in 2007, and the scale of the ecological functions of provincial and municipal zoning work is still in research stage. However, the practicality and enforceability of the large and the medium-scale ecological functions is not strong. In my view, small-scale ecological function zoning districts is more feasible and operable.In this paper, the evaluation of ecological functions in Jiangjing is by analysis the ecological environment situation, the ecologically sensitive and the ecosystem services, which bases on the studying of theory of ecological function zoning, in support of the software such as the ARCGIS9.3 and ERDAS9.1, setting the town as the evaluation unit, using the analysis of the quantitative analysis and the qualitative analysis, The ecological function zoning is Basing on the evaluation results and regional development orientation of Jiangjin.This research mainly includes the following phases:The fundamental research. This article analyzes the background and significance of the research topics, concluding the ecological function zoning research progress and the lack of existing research, elaborate theories of sustainable development, ecology and landscape ecology Progress in ecological function zoning and related theories, Besides which, this part analyzes the content and technical route of thStudy area analysis part. It takes Jiangjin as study area, and identifies Jiangjin's ecological function zoning as subjects. This part mainly analyzes Jiangjin topography, meteorology and hydrology, soil conditions and other natural profMap treatment process of eological function zoning. Basic maps are the 30m resolution Landsat TM remote sensing data of 2006,1:5000 topographic maps, and the map of geological disaster prevention planning in Jiangjin. This stage the main work is the interpretation of remote sensing images, the pre-interpretation of remote sensing image processing are remote sensing image geometric correction, histogram matching, image stitching and image segmentation, image enhancement and transformation. The Method of classification and interpretation is monitoring. Through the field sampling survey and investigation, and the land use change data to accuracy test. After classification, the Procedures are the sort, stack, vector processing, then enter tribute data, and forms the basis of ecological function zoning database.The evaluation of ecological functions is one of the main research contents of this paper. First of all, through the analytic hierarchy process, it determines the ecological evaluation index system. The level indicators are include the indicators of ecological and environment state, the indicators ecological sensitivity and the indicators of ecosystem services. The ecological and environment state indicators includes soil erosion intensity, Economic effective of per land area, rural-urban gap coefficient, per capita construction land, abundance of water resources, biodiversity, geological hazard susceptibility, green reasonable degree, intensity of industrial pollution, status indicators of the ecological sensitivity includes the sensitivity of soil erosion, habitat sensitivity, GDP elasticity of agricultural land, the unit GDP annual forest waste emissions and reductions, Status indicators of the importance of ecosystem services includes the interpretation of parts type of gas and climate regulation, water conservation, erosion control, soil formation, nutrient conservation, waste treatment, pollination, biodiversity conservation, food supply, raw materials, genetic resources and entertainment and cultural values. Secondly, it determines the weight of each index through the way of paired comparison and Delphi method, and through the combination of qualitative and quantitative analysis to determine the criteria score and the actual score of each index; Finaly, it gathers the total township value of the ecological functions.Ecological function zoning stage is a key part of this article. It seeks the views of relevant departments, bases on the total score of ecological functions and the ecological characteristics of each town to determine the division of scores and the partition. And then, it analyzes the regional of ecological environment and development orientation. Ultimately it forms three ecological zones:agglomeration eco-maintenance areas of the north industries area which along the river, the modern agro-ecological construction area of central hilly and the original ecological protection zone in the southern mountainous. At last, it analyzes the specific features of ecological areas, development orientation and existing environmental problems, by which it makes scientific and rational ecological protection and restoration suggestions.