基于GIS的?谑薪ㄔO(shè)用地生態(tài)適宜性評價
[Abstract]:Haikou City is selected as the research area, based on the analysis of the regional characteristics of Haikou City, the index system of the study area is established. With the support of RS and other software, the SPOT images of Haikou City in 1991, 2001 and 2010 are interpreted, and the rivers, woodland and cultivated land are extracted. With the support of Arc GIS9.3, the digital elevation model is established by using 1: 10000 topographic map to make population, economic and other social and economic factors data and slope, elevation, vegetation, etc. The spatial database was established by using the data of natural factors such as water area, and the weight was determined by analytic hierarchy process (AHP). Then, the ecological suitability of the construction land in the study area was comprehensively evaluated by the weighted superposition analysis of each factor. According to the evaluation results, different types of land use are classified, which provides a reference for the ecological environment protection and urban land development in the study area, and provides scientific basis for the land policy in the construction of international tourism island. The main results are as follows: the ecological suitability of construction land in the study area is relatively low as a whole, and the overall distribution law is north high and south low, the concrete manifestation is: 1, the "most suitable" area is 16047.0247hm2, which accounts for 7.03g / kg of total area; Its distribution is mainly concentrated in the northern part of the study area. In addition, there is a very small area distribution near the northeast coast. Its distribution is almost consistent with the distribution of construction land in the built-up area. 2. The area of "suitable" area is 16038.8905hm2, accounting for about 7.03g / h of the total area. The distribution area is mainly around the built area or within the buffer zone of the main traffic trunk line. 3. "basically suitable" grade land accounts for 19.77 points in the study area. It can be designated as a suitable area for construction, and its distribution is relatively scattered, mainly near the town. Within the buffer zone of the main traffic trunk area, cultivated land below 5, artificial grassland and areas with a high population density; 4, "very unsuitable" grade and "inappropriate" grade land account for 44.64% of the study area, which can be designated as restricted construction area, Most of them are cultivated land with relatively low altitude and gentle slope, woodland and gardens with general canopy density, etc. 5, the area of "unusable land" accounts for 21.54% of the study area and can be designated as a no-building area. It is mainly distributed in the southwest, central and northeast, mostly mangrove forest, forest land with high canopy density, the main traffic trunk, water area, such as more than 3 cultivated land, scenic spots and special land;
【學(xué)位授予單位】:海南師范大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2013
【分類號】:P208;X826
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