基于3S技术的绿洲荒漠过渡带生态环境的安全研究

本文根据生态系统内部诸因子的相关性以及绿洲与荒漠两大生态系统间的耦合机理,通过对过渡带生态环境进行时空分析与生态安全分析,计算得出了该绿洲生态环境安全程度的定量结果和生态环境演变的空间信息,在此基础上定量地分析及评价了研究区绿洲—荒漠过渡带的演变趋势,进一步提出了绿洲-荒漠过渡带生态环境安全预警系统的建立思路和利用遥感数据对其生态环境进行预警的简单方法。

Study On the Security of Ecological Environment of the Ecotone Between Oasis and Desert By "3S" Techniques

Using the modern apparatus and facilities, as well as the field observation , on the base of constructing the image database and the vector database, we studied the ecological changes and desertification of the Keriya oasis during recent 25 years, from 1976 to 2001. We analyzed the main factors that might be decisive for the evolution of environment, and put forward a constructive scheme for the local environment reservation and social economical planning. Through precaution system, it is possible to get quantitative data of the overall tendencies of the environmental changes in a certain periods of time. This method is the creativity of this paper. The study methods used in this research could be applied to other arid and semi-arid areas, and the results of the study would be used as a main reference for the future studies on the environment and the sustainable development in the southern edge of the Tarim Basin.