基于RS的徐州市区生态环境动态监测与评价分析

近年来,随着城市化进程推,城市生态环境正逐步恶化。徐州作为老矿业城市,情况尤其不为乐观,以徐州市区为例作生态评价分析。按照代表性、可操作性、适应性、可比性和方便性原则,选取了植被覆盖度、生物丰度、水网密度、人均绿地面积、城市环境污染负荷指数和环境质量综合指数作为评价指标来进行生态环境质量指数的计算。根据评价指标,选用1994年、2000年和2007年三个时相徐州市TM影像,对土地利用、河流水库、植被、人均绿地等方面进行遥感动态监测,然后对该地区13年来生态环境演变做了定量评价分析。评价结果表明,徐州市区生态环境质量由1994年的良好水平退化为一般水平,且有逐年下降恶化趋势,这与该区城市化进程一致。

Dynamic Monitoring and Evaluation of Ecological Environment Based on Remote Sensing Technology in Xuzhou City

In recent years, the city has great development. With the process of urbanization, urban ecological environment is gradually deteriorating. Especially Xuzhou City, as an old mining town, the situation is not optimistic. Therefore, we take Xuzhou City as the study region for ecological evaluation and analysis in this paper. Calculations on six evaluation indices inclusive of coverage areas of vegetations, biome, distributing percentage of water lines, the per capita green area, pollution of environment and comprehensive environment quality index were carried out to determine evaluating grades, according to the principles of representation, operability, adaptability and comparability. And in accordance with the indices, satellite remote sensing were applied to dynamic monitor the utilization of soil, rivers and reservoirs, the vegetation as well as the per capita green space in areas and other aspects, with selecting 1994, 2000 and 2007 three-phase TM images in Xuzhou as satellite data resources. Then the quantitative evolution and analysis of the ecological environment in this region for the past 13 years has done. The evaluation shows that the EQI of urban area of Xuzhou degenerates from 1994 year's good level to general level, and there is a declining trend of deterioration, which is consistent with the process of urbanization in this region.