• 论文 •

### 应用突变模型研究沙漠化过程的演变——以东北地区为例

1. 中国科学院自然资源综合考察委员会
• 出版日期:1982-04-15 发布日期:1982-04-15

### USE OF THE CATASTROPHE THEORY MODEL TO STUDY ONTHE PROCESS OF DESERTIFICATION──AN EXAMPLEOF SAND LAND OF NORTHEAST CHINA

Guo Shaoli, Qi Wenhu, Li Lixian

1. Commission for Integrated Survey of Natural Resources, Academia Sinica
• Online:1982-04-15 Published:1982-04-15

Abstract: The phenomena of desertification appears widely in the Northeast of our country. It causes the sharp reduction of biomass of land and the decline of productive poten-tialitives, and even the loss of applicable land resources. Therefore, the investigation of the process of desertification is not only of great theoretical value, but also of practi-cal significance to prevent the occurance of the phenomena of desertification.We try to abstract and summarize the process of desertification, and describe the phenomena of desertification by means of mathematical representation. We divide the process of desertification in a certain area into three states: the stably good farmland state, unstably critical state of desertification and stable desert state. Furthermore, we consider that there is a sudden change transected from the critical state to the desert state or from the critical state to the stable good farmland state. For this reason, we can adopt this mathematical form of cusp catastrophe model to link up these three statesof desertification, and use some new concepts and methods to describe and explain the phenomena of desertification.