Spatio-temporal Evolution Patterns of Desertification and Ecologi cal Landscape Reconstruction in Fuxin District of Liaoning Province Based on R S and GIS
Desertification is one of the most serious environment problems in the world today, the generation, development and reversion of desertification are caused by the results of comprehensive influences from the climatic and environmental change, and human activities. Fuxin area is located in the northwest of Liaoning province. The area is a composite zone of agriculture and animal husbandry .The types and the structures of desertification in this area are different, complex and typical. RS and GIS techniques are used for monitoring the dynamic changes and data processing in desertification research . The remote sensing image data of three different temporal phases during 21 years are used . The result of analysis shows that the evolved pattern of desertification in this area has two different stages. The situation of desertification was improved during the first 11 years, but intensified during the next 10 years. According to the environmental feature and the condition of the land-use in the research area, the spatio-temporal evolution pattern of desertification was systematically analyzed. The factors that have influenced on desertification were quantitatively evaluated using a series of environmental and socio-economic data. As a result the land-use pattern and landscape restoration tactics for the different types of desertification areas had been proposed following the principles of restoration ecology.