北京市生态环境质量动态变化及其影响因素分析

本文基于RS／GIS技术，利用北京市土地利用的遥感解译数据，结合北京市相关的统计数据，对北京市生态环境质量进行评价，并在此基础上依据其变化，对变化的影响因素进行分析．其结果显示，北京市整体生态环境质量评价结果基本保持不变，但个别因子变化较为明显，其中，北京的植被覆盖面积增多、空气质量有所改善对评价结果起促进作用，同时城镇用地的不断扩张以及水资源的逐年减少，也一定程度上影响了评价的结果．

Ecological Environment Quality Trends and Driving Factor Analysis in Beijing

Basing on RS/GIS technology, carries on ecological environment quality evaluation in Beijing, using the remote sensing imagery and some statistic data about Beijing. According to the ecological environment quality evaluation result, analyses the driving factors. As a result, during these years the ecological environment quality holds the line. However, the ecological environment quality changes evidently in some areas. On the one hand, it promotes the good result that Beijing has more and more woodland and its air quality improves greatly. On the other hand, two reasons affecting the result are the expansion of the town building area and the decrease of the water resource.