Author(s): Xiajihong; Yan Zhongmin; Lin Junqiang; Yao Li
Linked Author(s): Zhongming Yan
Keywords: River system; Dissipation; Order degree; Health diagnosis
Abstract: River is a continual system from upstream to downstream and estuary, which is made up of riparian, water body and biocommunity in cross section. Every components of the system are interrelated and interacted on each other so that river system is an integrated dissipation system and has self-adjustment ability and self-suitable ability. However, the self-adjustment ability is limited because river system is an opening system which would be affected by many outside factors. When the influence degree of outside factors is larger than the capacity of river, river system would be ill. Only if the every part of river system harmoniously operates, would river system be healthy. So healthy river system would be expressed by cooperation and order degree. It is obvious that calculating order degree is a kind of efficient way to diagnosing health of river system. In the method, it is the first objective to calculate the order degree of order parameters. Calculating limpidity index and flowing index and virescence index and landscape index is the second objective. It is the last objective that general health index would be obtained. So, it is very important that diagnosing indexes might be given in the method. Then the order degree of each index and sub-object and general object would be calculated by use of order degree model. Lastly, health grade of river system would be ascertained. According to the method, health status of Anxi river inYunhe have been diagnosed. Results have showed that the river is health.
Year: 2009