成都市景观生态安全格局动态变化

The Dynamic Change of Landscape Ecological Security Pattern in Chengdu Municipality

采用1985年、1995年TM和2006年ETM卫星数据作主要数据源,运用GIS技术,以景观生态安全格局理论与方法为指导,研究成都市景观生态安全格局的特点和时空变化趋势,结果表明:1985—2006年,成都市景观生态安全格局的整体生态安全水平分布不平衡,西北部的高山深丘地区和中部平原东面的低山丘陵地区大多处于高安全区,中部盆地平原区和东部浅丘部地区多处在低、中安全区;其中,1985年的生态安全状态最好,高安全区面积所占比例最大;1985—1995年,生态安全状态有所恶化,大部分高安全区转化为中安全区;1995—2006年,生态安全状态有所改善,大部分中安全区再次转化为高安全区。

Based on the TM satellite data collected in 1985, 1995 and ETM satellite data obtained in 2006, the characteristics of landscape ecological security pattern and the spatial and temporal change of the features in Chengdu Municipality were studied with GIS technology under the guidance of the related theories and methods. The results showed that the overall landscape ecological security level in Chengdu Municipality was unevenly distributed during 1985 -2006, the mountainous and high-hilly areas in the northwestern part and most of the low-hilly areas to the east of the central plain area belonged to the high security zone, whereas the central plain area and the eastern low-hilly area belonged to the low security zone. The landscape ecologi- cal security status in 1985 was the best, and the high security area accounted for 68.04%. During 1985 - 1995, the ecological security status was deteriorated, most of the high security zone was converted into moder- ate security area. The ecological security status was improved from 1995 to 2006, most of the moderate securi- ty area again turned into high security zone.