Study On Available Water Resources In Arid Inland Region Of Northwest

Seen from research results that can be found at present about usable amount of water resources, methods adopted in the study on usable amount are straight algorithm applied to moist areas and pouring algorithm suitable for areas lacking water. Since either of these two methods deals with a single system, the research results lack binding character. Under the principle of coordination, however, this paper, which is concerned with two major systems of social economy and ecological environment, distributes, by means of dynamic planning theory of the big system, the amount of water required by social economy and consumed in the ecological environment on condition that there is certain amount of water resources.This paper coordinates the research on the big system of water resources by making use of system engineering, big system multi-goals dynamic planning theory, economic theories including econometrics and economic forecasting, and ecology resuming theory. With "one thread, two sidetracks and three water amounts", this paper makes a preliminary research on the usable amount of water resources, which can be divided into following four major parts besides introduction:Part I (Chapters 2-3): By making use of investing-producing law, macroscopical economic forecasting, econometrics, system optimization, statistical analysis method, this part, on the premise of predicted development scale of the social economic system, studies the amount of water required by the social economic system and establishes the solving model for it. Meanwhile, in accordance with the principle of protecting current situation of ecological environment, it studies the amount of water consumed in the present ecological environment by making use of the quota law, ecology resuming theory, environmental ecology and information ecology. Besides, by adopting research results available, this part sets up the model for the direct calculation of the amount of water consumed in the ecological environment.Part II (Chapter 4): By making use of the multi-goals dynamic planning theory of the big system, this part, based on both the predicted trend of the development of the social economic system and the current situation of the ecological environment, sets up the model for coordinating these two systems. In addition, on the premise that the average water has been unchangeably certain in total amount for years, it attempts to coordinate the amount of water required in the above-mentioned two systems and ascertains the usable amount of water resources by comparative analysis of water amount.Part III (Chapter 5): Taking Xinjiang, representative of the inland arid areas, as an example, this part, with the help of the models established in the previous parts of the paper, calculates theamount of water required by the social economic system and consumed in the ecological environment, and the amount of water coordinated in these two systems. By comparative analysis of the calculations, this part puts forwards, in terms of both project measures and non-project measures, the amount usable in Xinjiang to guarantee the social economic development. The conclusion drawn from this case lays a foundation for the sustainable utilization and management of water resources in Northwest arid areas.Part IV (Chapter 6): It makes the conclusion and puts forward the fields of study and break-through points in future research of usable amount of water resources.