Total Water Quality Index Using Weighting Factors and Standardized into a Parameter
The article by GS. Dr. Pham Ngoc Ho, Research Center for Monitoring and Modeling Environment (CEMM), University of Natural Sciences, VNU, Chairman of the CEMM Environmental Protection Association, VACNE members.
The Article published in the journal Science, National University of Hanoi, Natural Sciences and Technology 27, No. 5S (2011) 112-119.
Total Water Quality Index Using Weighting Factors and Standardized into a Parameter
Pham Ngoc Ho
Research Center for Environmental Monitoring and Modeling (CEMM)
VNU University of Science, 334 Nguyen Trai, Hanoi, Vietnam
The paper investigates an innovative approach in assessing integrated environmental quality using
indices that have been applied in many countries, such as Belgium, the United States and Canada. The
approach (abbreviated as TEQI) is more innovative than other indexed approach. Concretely, in this
approach, the important weight of studied parameter taking into account theirs poisonous levels and
classification scale for assessment of water quality depending on total number of parameters n
(2≤n≤100) were established by calculating from theoretical formulas, not be assigned as the others.
The results of the application of TWQI to the assessment of coastal water (n=13) show that the
ranking in TWQI corresponds to the actual monitored data.
Keywords: weight, standardized, total water quanlity index.
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