新疆天山北坡3种地表植被指数检测方法与监测

Monitoring of Surface Vegetation in the North Slope of Tianshan Mountains by Three Detection Methods

应用3种地表植被检测方法计算了2000—2004年间新疆北部地区植被的变化状况,总结了计算结果的相关特征。综合统计结果显示,5a来植被生长状况总体要好于前8a(1991—1999年);但中、高山带的林地和乌鲁木齐—石河子绿洲上的农用地都发生了不同程度、高比例、大面积的退化,只有很小比例的植被得以改善,表现出局部恶化,总体改善的局面。

The changing status of surface vegetation in the North Slope of Tianshan Mountains was monitored by three detection methods during 2000 and 2004. The correlation characteristic of the calculation results was analysed. Results show that the growth status of the vegetations in recent five years （2000-2004） is better than that in the previous nine years （ 1991- 1999）. However, the forestland in the middle and upper parts of the mountains as well as the farmland on the oasis from Urumqi to Shihezi displays various degradation with high proportion and large area, and only a small proportion of the vegetations improve, indicating a characteristic of partial worsening and overall improvement.