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Wetland is a kind of land resources and also a kind of ecological environment, it play more important role in people daily lives. Wetland has the vital role in the ecosystem such as storage of water, transformation of nutrients, especially its water purification function, which has important economy and ecological value. The wetlands water purifies mainly aims at nitrogen and phosphorus which causes...
Baiyangdian is the largest wetland in north China, and plays an important role in many aspects such as climate regulation, biodiversity protection, flood control, and local fishery production etc. the research of this paper include the following four aspects: 1) The composition, current situation, and changing tendency of sub-systems that constructed the whole system. 2) Building up the system model...
A water balance model is established in this paper. The relationship between water requirement and lake ecosystem is built and reflected by the appropriate water level to protect lakes and wetlands. And some measures of controlling human management action with water limit are put forward by the example of the Baiyangdian Lake.
Getting an objective, scientific and general ecosystem health assessment is the precondition and foundation of watershed management. This paper reviewed the concept and content of the NWA assessment system (natural constraint factor-watershed health indicator factor-anthropogenic disturbance factor" assessment system), and selected twelve indicators and constructed the model based on the character...
Against the background of conspicuous problem of river pollution in Chinapsilas water resources affairs, we made a case study on the Ji River of Gansu Province to apply the principle that water can be naturally purified by plant communities to the functional division and tackling plan of the urban rivers in northwest China. The district section of the Ji River is mainly divided into three parts: (1)...
The prevalent water problems like quantity shortage, environment pollution and ecological damage restrict urban sustainable development. Unreasonable water utilizing causes conflicts between artificial water cycling system and natural cycling water system, which turns out to be the source of urban water problems. To find ultimate solutions to the water problems and the way of sustainable water utilization,...
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