历史时期以来南疆绿洲地域系统的演变与农业文明

The Relation of Oasis System Evolution and Agricultral Civilization in Nanjiang

分析了历史时期以来南疆南部地区自然环境系统的基本特征 ,及其对绿洲演化的影响 .认为南疆绿洲地域系统演变经历了三个阶段 ,且其演变是自然与人文因素综合作用的结果 .在此基础上剖析了农业文明对南疆绿洲演变的适应和冲击 .

The formation and evolution of Nanjiang oasis system is decided by climate, hydrology and other natural factors , also by mankind activities with improvement of productive tools and raising skills in water resources management. The ancient small oases are mostly distributed in top or lower river area . When climate becomes cold and wet, the oases along south edge of Taklamakan desert developed very quickly especially in stables society and national concord period. Otherwise, while the environment worsened , some oases were discarded and the desertation was coming .Along with the development of agriculture oases are moving towards the middle river regions where water resources are sufficient. Since the recent half century the plain reservoir should be constructed to regulate runoff because of the further enlargement of oases.Based by the above analyses , the effect of Nanjiang agricultural civilization process towards physical environment system is also discussed in this paper.ymankindactivitiesw