The author tries to restore the situation of forest distribution and overlay, and describes the changes and causes of distribution acreage and space in Longdong region from Qing Dynasty to the Republic of China.
This chapter analyzes the population growth and migration, demographic structure, foreigners in the city, and the changes of occupational and stratum structures in the city society in the urbanization process.
During the period the frequent visits of wars and natural disasters bring the area intensive impacts upon its social ecology in a whole,and as a result dramastic changes,negative or positive,take place in economy,politics and social humanist environment.
The Tarim River basin belongs to the ecological environment frail area, disquisitions on stations troops to open up wasteland active on the area and the environmental changes have quite been rich, which are the quite solid foundation to discuss the influence of the policy to the environmental changes.
Based on it, this paper took the Middle and Lower Reaches Tarim River for example from 1759 to 1949, it studied the implementation of the policy by the collection, the reorganization and analysis literature record. If there had been influence of the policy to the environmental changes was discussed?