This paper introduces a simple method of colour enhancement and classification through C-4500 image processing system.The main steps are as follows. First

on the display screen of the image processing system

colour-code different density numbers of B/W MSS image for study area. Second

co-mparing known and dishtinguishable image interpretation key

may confirm what homplogues of different density numbers are. Then

eshtablishe a colour coding plan based on the histogram of brightness numbers of landsat digital image. This way

we engage in supervised colour classification to the image and a definite colour represents certain object.This means a chives complete success in studing on the underground water distribution and its flowing direction

the area of pressure water

the relation between the desert vegetation and the underground water of gobi and desert area in the southern margin of Junggar Basin （Jungghariya）

Xinjiang.