摘要
以黄河中游多沙粗沙区皇甫川、孤山川、窟野河、秃尾河和佳芦河5条重点支流为研究对象,以1998年、2009年2期同一时相的TM影像为数据源,以归一化植被指数(NDVI)和植被覆盖度遥感定量模型为基础,提取2期植被覆盖等级,定量分析了该地区植被覆盖度的变化情况。结果表明:通过近10 a来的综合治理,2009年5条流域整体植被覆盖度提高,除皇甫川外,其他4条支流的中下游地区植被覆盖度明显提高。从植被覆盖的等级变化来说,1998年主要的植被覆盖度为0～10%和10%～30%这2个等级,2009年主要集中在10%～30%和30%～50%这2个等级,植被覆盖状况已向良好转变。
Taking five key tributaries of the middle reaehes cff the Yellow River coarse sand area as research objects, whieh are Huangfuchuan, Gush- anchuan, Kuye River Tuwei River and Jialu RioTer, according to the TM image in the same time phase in 1998 and 2009 and 1 ： 100 000 topographic map, based on the normalized difference vegetation index （NDVI） and the vegetation coverage in Remote Sensing Quantitative Model, two vegetation cover level diagram were extracted and changes in the vegetation coverage were quantitatively analyzed. The results show that： vegetation coverage in the five watersheds a~ overall elevated in 2009, except Huangfuchuan, four tributaries in the middle and lower reaches of vegetation coverage are sig- nificantly improved through nearly 10 - year＇ s comprehensive treatment. Level changes of vegetation cover, the main vegetation coverage are 0 to 10% aad 10% to 30% in 1998, while they are 10% to 30% and 30% to 50% in 20,09, which means vegetation cover has good trend change.
出处
《人民黄河》
CAS
北大核心
2012年第12期94-95,111,共3页
Yellow River
基金
水利部公益性行业科研专项(200901019)
"十二五"国家科技支撑计划项目(2012BAB02B05)
关键词
NDVI
植被覆盖
遥感监测
黄河中游
多沙粗沙区
NDVI
vegetation cover
remote sensing monitoring
middle reaches of the Yellow River
coarse sand area
