Quantitative analysis on the vegetation coverage changes of Minqin Oasis based on MODIS
In this paper,the typical Minqin oasis were taken as research area.Using standard MODIS data products of MOD13 and improved vegetation coverage estimation model,the vegetation coverage from July 2000 to July 2010 were estimated and classified,the distribution characteristics of vegetation coverage and the dynamic changes of different vegetation coverage were analyzed through quantitative analysis of special overlay.Analysis showed that during the study years Minqin Oasis changed dramatically,the area of oasis shrinked significantly and desert expanded further more,the increase area of very low vegetation coverage was 1106.01 km^2 and it took up 26.95% of the whole study areas.The vegetation coverage types of intermediate and high grade reduced by 133.63 km^2 and 54.75 km^2 respectively,accounted for 3.26% and 1.33% of the whole study areas.In a whole,the area of Minqin oasis shrinked dramatically,a large number of island oasises were lost,and the northwest was the most serious part.
NETL
NSTL
万方数据
维普
