Landform morphological factors and their impact on environment of the Sangong River Basin

Landform,one of the most important elements of the earth surface layer system,controls the change of the ecological and environmental elements to a certain extent.In arid areas,it is the element that can not be ignored in the study of basin environmental change and regional development.The Sangong River Basin is located on the north slope of the Tianshan Mountains,to the south edge of the Junggar Basin and within the scope of Fukang County.There are three rivers in this basin: the Sangong River,Sigong River and Shuimogou River.This paper taking the Sangong River Basin as the study area creates special maps of elevation,slope,aspect and hypsography of the Sangong River Basin and analyses all of them based on GIS.The results show that: 61.34% of the total study area is low-lying(elevation 1000 m),57.06% of the total study area is gentle sloping(slope ≤ 3°),53.81% of the total study area is towards the north and 39.73% of the total study area is plain(hypsography 20 m).This paper analyzes the landform morphological character quantitatively in the river basin based on GIS,and discusses the impact of landform morphological factors on the environment combined with ETM satellite images and field investigations,and makes a base for further analyzing the effect of landform on ecological environment.