The paper develops an automatic lake delineation algorithm based on"global-local"iterative scheme.The author uses NDWI（Normalized Difference Water Index） as the water identification index for the threshold segmentation process

and the slope maps and the shaded relief maps are applied in the algorithm to differentiate the shadow features from water features. Based on these methods

an automatic lakes delineation scheme is proposed to map the glacial lakes with Landsat Imagery in Himalayas mountains area.The results show that the proposed algorithm has good performance on lake mapping over the mountain areas

and lakes can be extracted automatically

accurately and efficiently

while most of melting glaciers and hill shadow features are eliminated from the segmentation processing.