The Historical Investigation Of Qing's Water Environment In Orduosi Plateau

In the last several decades, People attach more and more important on the environment evolution research,The environment of water, As a important constituting part of ecosystem, Similar to temporature of air, Is the factor decisive function Cor environment quantity .Orduosi platean lie in the district, of transition witch from semi -dry to dry, The ecosystem has obviously weakness, This is the common in the region in northwest area of our country.As human activity and nature's double function, Since the end of qing dynasty, Big changes has taken place in orduosi plateaus ecosystem, During this over one hundred year , The changes of wheather are small.It has no permanent function on enivornmental evolution . In addition, At present, Science and technique cannot change it at all. So, As for the research of environment evolution about orduosi, The influence of the human activity is the focus studies.This thesis regards the environment of water as studying contents, By collectting, Tidying, categorizng,And analyzing concern historical material, Combling the related research result, Resuming the river and lake of qing, And comparing it with current condition. Displaying the large difference .Analyzing artificial reasons.The thesis setup includes primarily below four aspects.Firstly, the meaning and condiction of study ,the present condition, the introduction of material and the research method .This is the contents of preface and first chapter.Secondly,the current background of orduosi. This is the contents of chapter 2.Thirdly, The historical investigation of qing's water environment in orduosi plateau, This is the contents of chapter 3.Fourthly, the changes of environment of water and prairie, This is the contents of chapter A.