Quantificational analysis on progress of river water quality in China  

作　　者：YUN Yi,ZOU Zhihong,FENG Wei,RU Mai School of Economics and Management,Beihang University,Beijing 100191,China. 

出　　处：《Journal of Environmental Sciences》2009年第6期770-773,共4页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No. 50778009)

摘　　要：In order to understand the dynamic change of water quality in a specific period of time,a type of possibility transition matrix based on the theory of Markov process was established.The transition possibility with a weight to calculate the degree of absolute advancement was given based on the result of water quality evaluation.The concept of relative advancement was presented.It was used to evaluate the extent of water quality changed in a period of time.The method was used to calculate the degrees of relative advancement for 4 rivers in China,and the results were analyzed.In order to understand the dynamic change of water quality in a specific period of time,a type of possibility transition matrix based on the theory of Markov process was established.The transition possibility with a weight to calculate the degree of absolute advancement was given based on the result of water quality evaluation.The concept of relative advancement was presented.It was used to evaluate the extent of water quality changed in a period of time.The method was used to calculate the degrees of relative advancement for 4 rivers in China,and the results were analyzed.

关 键 词：water quality evaluation possibility transition matrix Markov process degree of advancement 

分 类 号：X824[环境科学与工程—环境工程]