摘要
利用Landsat数据、Modis数据,分别提取了1980年、1990年、2000年、2008年鄂尔多斯地区湖泊的水体指数与植被指数,统计了不同年代各湖泊的水面面积并分析了湖泊面积变化的原因。结果表明:鄂尔多斯地区湖泊总面积由1980年的297 km2萎缩至2008年的136 km2,萎缩了54%;湖泊萎缩率与海拔高度关系密切,高海拔区域湖泊的萎缩率较高,而地势低洼区域湖泊的萎缩率较低;湖泊萎缩影响因素有降水量减少、人类活动和植被指数增大等,其中植被指数的增大可能是最重要的影响因素。
The paper extracted the water index and the vegetation index of the Ordos region＇ s lakes in 1980, 1990, 2000 and 2008, by using Landsat data, and Modis data, respectively. Water surface area of the lakes in different years and the masons for the change of the lakes area were analyzed. The results show that the total area of lakes in Ordos has shrunk from 297 km2 in 1980 to 136 km2 in 2008 shrinking by 54% ; the lakes atrophy rate has a close relationship with altitude ,the higher the altitude ,the higher the lakes atrophy rate will be happened; the influence factors of lakes atrophy rate are rainfall reduction, human activity and vegetation growth et al, and the growth of the vegetation index might be the most important factor.
出处
《人民黄河》
CAS
北大核心
2013年第2期45-46,49,共3页
Yellow River
