Study On The Eco-environmental Evolution And Its Human Driving Forces In The Yutian Oasis

Eco-environment is the fundamental condition for human beings to live and develop ,and is base of development of society and social economy.With human social and economic activities and global change intensifying, ecological environmental of arid and semiarid land been through corresponding changes.So , carrying out a research on laws of the evolution of eco-environment and its response to human activity intensity as well as find out the efficient interaction mechanism of human activit changes and eco-environmental evolution has great scientific values and practical significance.In this paper author based on data statistics,field practical measurement and laboratory analyze, Study on the evolution of eco-environment and human activity changes of Yutian oasis. The academic problems on laws of eco-environmental evolution, its responses to human activity, interaction between human activity and eco-environment are discussed.Then provide scientific bases for sustainable development of human and eco-environment.The paper is divided into six parts. The first part included introduction the background of this task, the research headway in and out of China.Significance and main contents of this study , research methods applied,technical map and survey of the research aria.In the second part,begin with discussing the main characters of eco-environment of Yutian oasis,based on relative statistic data and frontier research result ,using Comprehensive Fuzzy Assessment ,eco-environmental Vulnerability of Yutian oasis during each period of 1960s,1970s,1980s,1990s and 2000s,are assessed,the result are being compared.And the main causes of eco-environmental evolution of the research aria are analyzed.In the third part, after analyzing the definition of human activity and its main characters as well as evolution trends, applying mathematical model, and AHP method, human factor indexes in the years during the period of 1949-2006 are calculated , and its changes and including factors separately analyzed.In the forth part, the relationships between human activity and eco-environmental changes, and impacts of human activity on the evolution of eco-environment are discussed.Applying methods in contemporary geography like gray relation analysis and factor analyze, quantitative relationship between human factor indexes and eco-environmental Vulnerability are analyzed.And the human activities as a driving force of land and vegetation changes are being discussed.In the fifth part, base on the theories of sustainable development, applying AHP method, discuss the efficient way of improving ecological benefits of human activity.In the sixth part is conclusion.Through analysis and research, the following important conclusions are gotten:In the past 60 years ,The eco-environment of Yutian oasis was seriously vulnerable.The eco-environment have not been through significant changes.But the vulnerability degree is dropping slightly and eco-environment is getting better partially.From the passed 60 years,human activity intensity level have been increasing ,the social factor holds the highest increasing rate ,and economic factor ranks second,the increasing rate of culture factor is the lowest among the three main factor.Human factor always is the most important drive force to development and evolution of eco-environment of Yutian oasis. Each index of human activity has contributions to land and vegetation changes of the oasis at different level.Evolution of eco-environment of Yutian oasis is determined by human activity intensity at large extent.In order to improve the efficiency of the human-activity-intensity on eco-environment, positive effects of human activity on eco-environment should be increased as well as the negative influences of human activity on eco-environment should be controlled,and more efforts should be taken on environmental consideration.And to attain the goal,a series of problems should be taken into consideration firstly, such as poverty,poor quality of education,high population growth,lack of investment on agricultural equipments.