基于GIS和RS的沿海县生态环境质量综合评价——以霞浦县为例

Comprehensive Evaluation of Ecological Environment Quality of Coastal Counties Based on GIS and RS——Taking Xiapu County as an example

基于遥感影像数据,以霞浦县为研究区,提取土地利用专题信息,从社会因子、植被因子、地表因子、地形因子四个方面来进行因子的选取,选择人口密度、城市扩张强度、生态系统稳定性指数、植被覆盖度、地表温度、水体指数、高程、坡度8个参考因子来评估霞浦县生态环境质量情况,采用熵权法确定各指标的权重,构建生态环境综合指数模型,将生态环境质量划分为劣、差、中、良、优五个等级,对霞浦县生态环境质量进行评价。

The quality of ecological environment is the foundation of social and economic development,the guarantee of sustainable development and an important indicator of the comfort of the population environment.The evaluation of the status quo of Xiapu County’s ecological environment quality can provide an important basis for Xiapu County’s ecological planning,ecological economic planning,ecological restoration and ecological construction.The study used Xiapu County as a research area to extract land use thematic information based on remote sensing image data.The indicators were selected from four aspects:social factors,vegetation factors,surface factors and topographic factors.The study selected the eight reference factors of population density,urban expansion intensity,ecosystem stability index,vegetation coverage,surface temperature,water body index,elevation and slope to evaluate Xiapu.County’s ecological environment quality.The entropy weight method was used to determine the weight of each indicator,and the ecological environment comprehensive index model was constructed.The ecological environment quality was divided into five levels:inferior,poor,medium,good and excellent.,The main conclusions of the study on the ecological environment quality of Xiapu County.