Study on Land Desertification with RS and GIS Techniques in Alagan, the Lower Reaches of Tarim River
利用遥感和GIS研究塔里木河下游阿拉干地区土地沙漠化

There are a series of ecological environment problems in different areas of the Tarim river basin. Affected by irrational human activities, especially by the irrational use of water resource, desertification generally exsited in the lower reaches of the river. Based on the RS information of multiseason (1959,1983,1992), multiband and multiplatform, depended on the date of GPS positioning, spectral measurment as well as analysis of soil, vegetation and water samples, the desertification maps are produced for different years in Alagan. Moreover, under the support of ARC/INFO software, the dynamic maps of desertification are made. According to the information of GIS DB, system theory, information theory and control theory are used for analysing the processing of desertification in Alagan. At last. based on the model of GM(1,1), the desertification bend in Alagan is predicted.