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A universal index formula suitable to multiparameter water quality evaluation
Author(s) -
Peng Lihong
Publication year - 2004
Publication title -
numerical methods for partial differential equations
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.901
H-Index - 61
eISSN - 1098-2426
pISSN - 0749-159X
DOI - 10.1002/num.10090
Subject(s) - mathematics , comparability , logarithm , index (typography) , generality , quality (philosophy) , partial derivative , function (biology) , statistics , mathematical analysis , computer science , psychology , philosophy , epistemology , combinatorics , world wide web , psychotherapist , evolutionary biology , biology
Based on hypothesis of “base value” of water quality parameter, a universal index suitable to multi‐parameter water quality evaluation was presented, as the monitoring values of parameters in the water quality index formula in logarithm function form were replaced by their relative values, and optimizing the parameters of different indices in the formula was carried out by Genetic Algorithms. Each index of water quality can be weighted into comprehensive index by compromise active function. The correctitude of formula was verified by using this method to asses the water quality states of many spots. The formula has shown its simplicity of calculation, practicability, generality, comparability and objectivity. © 2004 Wiley Periodicals, Inc. Numer Methods Partial Differential Eq 20: 368–373, 2004