昆明市石漠化敏感性评价

以TM影像为数据源,选取植被覆盖率、裸岩率、坡度和降雨量为评价指标,开展昆明市石漠化敏感性评价。评价结果显示,昆明市石漠化不敏感面积为7581.53km2,轻度敏感面积为5564.97km2,中度敏感面积为2810.42km2,高度敏感面积为5080.30km2。从空间分布上看,昆明市石漠化敏感性较高的区域主要分布于金沙江流域和东南部地区,这些区域为典型的喀斯特地貌,地表破碎、坡度较大,水土流失较为严重。总体而言,昆明市石漠化敏感性总体相对较高,在区域开发与保护过程中要引起高度重视,避免石漠化生态环境问题的出现或升级。

An Evaluation on Desertification Sensitivity of Kunming Municipality

Based on the data taken from the TM images, the desertification sensitivity of Kunming Municipality has been evaluated against such indicators as vegetation cover, bare rock ratio, slope and rainfall. The results show that except the area of 7581. 53 km2, the rest of the municipal area is susceptible to desertification to different degrees, with the mildly sensitive area of 5564. 97 km2, the moderately sensitive area of 2810. 42 kin2 and the highly sensitive area of 5080. 30 km2. Spatially said, most of the sensitive area is distributed in the Jinsha River Watershed and the east - south of Kunming Municipality, where the karst landform is quite developed with steep slope and serious soil erosion. the particular attention should In general, the desertification sensitivity of Kunming Municipality is be paid to the conservation during the regional development to avoid relatively high, the further degrading ecological situtation.