WU Ya-nan, PANG Zhi-guo, LU Jing-xuan, QU Wei

Remote Sensing Technology Application Center, IWHR, Beijing 100048, China

Abstract: Based on the multi-source remote sensing (RS) data of Landsat MSS/TM/ETM + and HJ-1A, this paper reveals the dynamic variation of the wetland area in Hulun Lake monitored from 1975 to 2011 and analyzes the driving forces in aspects of nature and socio-economy, using the model of the normal differential water index (NDWI) and supervised classification method with man-machine interactive interpretation. The results show that the Hulun Lake has presented a trend toward shrinking and degradation in the past 36 years. The water body area of Hulun Lake decreased by 22.7% in 2011 compared with that in 1975, and the figure of wetland area declined by 25.9% in 2011 compared with that of 1975. It is believed that natural factors are the main causes that led to the reduction of water body and wetland area in Hulun Lake. Besides, socio-economic factors accelerate the degradation of the Hulun Lake wetland to some extent.

Key words: RS, Landsat MSS/TM/ETM+, HJ-1A, Hulun Lake, wetland

Published in: Journal of China Institute of Water Resources and Hydropower Research (Vol. 11 No. 1, 2013)