Preliminary Study Of The Water Demand On The Ecological Environment Of The Basin System

Since the 80's of last century, the sustainable development thought has formed.The evaluation theory and method of sustainable development have been improved and perfected. To the 90's of 20~th century, the crisis and scarcity of the water of the world urge people to pay more attention to sustainable using of water resources. Especially, a series of problems such as, variety decrease in living creature even the species distinction, lead to people's attentions, which result from the crisis and scarcity of the water resources. Therefore, related researches on water resources and ecosystem environment, especially researches on water consumption for eco-environmental aspects become one of the focuses of the world research.First, this thesis analyzes watershed system from system theory, and differentiates related concept on water consumption for eco-environmental aspects. At the same time, the author analyzes classification of water consumption for eco-environmental aspects in watershed system from ecosystem type and space dimensions aspects in watershed system. And sorts the domestic and international development on water consumption for eco-environmental aspects of watershed system.Second, this thesis simple analyzes connotation and extension of water consumption for eco-environmental aspects of eco-environment. Then analyzes inside and outside factors, which influence it.Third, the article analyzes calculating principle of water consumption for eco-environmental aspects of eco-environment. And evaluates research methods on eco-environment water demand, and introduces calculation methods of water consumption for eco-environmental aspects on river system, lake system, wetly system, dry land system and city system.Finally, this thesis studies how to realize reasonable installs of eco-environment water demand in watershed system. This article also analyzes research shortage on water consumption for eco-environmental aspects in watershed system now, and outlooks research trend and development direction in future research.