Research on Construction Land Evaluation Based on Land Ecological Sensitivity Analysis

The methods of land ecological sensitivity analysis were discussed, based on the concept of protection goes first to the construction land pattern. With a combination of comprehensive index method, fuzzy evaluation method and RS/GIS approach, an integrated method of construction land suitability assessment was proposed. It offers three factors that mainly influence the construction land-use environment including land ecological sensitivity, natural condition and social economy environment, and it introduces the fuzzy membership functions to improve the model algorithm. The evaluation results would hierarchically display different land ecological sensitivity endowment and land-use environment, which leads to analyze the construction land spatial distribution in a land ecological security pattern. Taking Xiangjiang New District of Changsha City as a case, 14 indexes were chosen in accordance with the local conditions, to assess construction land suitability of this area. The results objectively show the region's land ecological environment and land-use condition, and give an ecological security spatial arrangement of the construction land pattern, which can provide guidance to land-use planning of the resource-economical and environment-friendly society.