Study On The Ecological Planning Of Jixi National Wetland Park Based On Ecological Sensitivity Evaluation

Wetland park is an important ecological infrastructure, the city has a purifying urban pollution, by regulating climate, improving the urban environment, to provide a rich variety of habitats, provide city residents with entertainment and education places such as ecological and social service function. Ecological sensitivity assessment is one of the important factors and wetland ecological environment evaluation indicators, and has become a reasonable ecological function regionalization, maintain the ecosystem safety, important means to ensure the sustainable development of the ecological environment and the effective method. Through the present situation of wetland park ecological sensitivity evaluation of the natural environment under the background of potential ecological environment problems are identified, and to carry out the space to a specific region, it can clear categories and levels in different areas of the wetland park protection, ecological zoning plan, for ecological planning of wetland park to provide scientific theoretical basis and important support.Supported by RS and GIS technology, this study established the west national wetland park landscape information database. Delphi expert scoring method is used to choose the terrain, water, vegetation coverage, vegetation type, such as 7 indicators, constructs the Jixi west national wetland park ecological sensitivity evaluation index system, wetland park for the ecological sensitivity analysis and evaluation, and on the basis of ecological planning.The results show that:1. The west national wetland park landscape information database establishedAccording to the interpretation result will be divided into economic west national wetland park landscape road, grass land, wetland, forest land, buildings, water village, farmland and other 8 classes. Area of each landscape type diversity, the number of patches, and relatively concentrated distribution. Among them, water, wetland and woodland area is larger, accounts for about half of the total area. Villages and roads construction land area is relatively small, accounted for only 8.1% of the total area. In addition to the right to use construction land, whole other landscape types and landscape fragmentation degree is not big.2. The wetland park ecological sensitivity evaluationThrough Delphi expert scoring method to select the altitude, slope, vegetation coverage, the waters of the wetland and buffer, landscape pattern, landscape ecological value, the vegetation types 7 indexes.By evaluating the elevation, vegetation coverage, waters, the ecological sensitivity of the landscape pattern were classified as extremely sensitive, high, medium and weak, is not sensitive to five grades; Slope ecological sensitivity is divided into high, medium and low, is not sensitive to four grades; Landscape ecological value of ecological sensitivity is divided into three grades:high, medium and weak; Park vegetation type ecological sensitivity is divided into extremely, extremely, high, medium and weak, is not sensitive to 6 grade.Through evaluation of wetland park altitude, vegetation coverage, landscape ecological value of the whole ecological sensitivity are moderately sensitive; Slope and the landscape pattern of the overall sensitivity for low-alcohol sensitive; Water, wetland and vegetation type of the overall sensitivity for highly sensitive.Through the ecological sensitivity evaluation to Jixi west national wetland park as highly sensitive, moderate sensitive and low sensitive, is not sensitive to four grades; According to the sensitive area of wetland park area and spatial distribution characteristics analysis comprehensive ecological sensitivity is moderately sensitive.3. The west national wetland park ecological planningIn Jixi west national wetland park ecological sensitivity on the basis of single factor evaluation and integrated evaluation, the wetland park planning for "a ring, area, five area" of the overall layout, and from to protect, restore, road traffic, tourism projects, the environmental monitoring ecological planning five aspect.