Top 6 water quality index calculation methods in 2023

Author: www.agry.purdue.edu

Date Submitted: 06/02/2022 11:10 AM

Average star voting: 3 ⭐ ( 14634 reviews)

Summary: Human activities continue to affect our water quality; it remains a major problem worldwide (particularly concerning freshwater and human consumption). A critical water quality index (WQI) method has been used to determine the overall water quality status of surface water and groundwater systems globally since the 1960s. WQI follows four steps: parameter selection, sub-indices, establishing weights, and final index aggregation, which are addressed in this review. However, the WQI method is a prolonged process and applied to specific water quality parameters, i.e., water consumption (particular area and time) and other purposes. Therefore, this review discusses the WQI method in simple steps, for water quality assessment, based on two multi-criteria decision-making (MCDM) methods: (1) analytical hierarchical process (AHP); and (2) measuring attractiveness by a categorically based evaluation technique (MACBETH). MCDM methods can facilitate easy calculations, with less effort and great accuracy. Moreover, the uncertainty and eclipsing problems are also discussed—a challenge at every step of WQI development, particularly for parameter selection and establishing weights. This review will help provide water management authorities with useful knowledge pertaining to water usage or modification of existing indicators globally, and contribute to future WQI planning and studies for drinking, irrigation, domestic, and industrial purposes.

Match with the search results: represent individual index terms with different weighting factors for each parameter. ISQA varies from 0 to 100, with 100 indicating excellent water quality, as shown to the left….. read more

Author: www.sarasota.wateratlas.usf.edu

Date Submitted: 09/25/2019 05:57 PM

Average star voting: 4 ⭐ ( 22368 reviews)

Summary:

Match with the search results: The quarterly WQI for a waterbody is determined by averaging the index values for selected water quality parameters for the interval. Ranges of WQI values have ……. read more

Author: www.researchgate.net

Date Submitted: 08/27/2020 07:40 PM

Average star voting: 4 ⭐ ( 52515 reviews)

Summary: Commonly Used Methods to Calculate Water Quality Indices: 10.4018/978-1-7998-7356-3.ch012: Water supplied to communities should be of acceptable level in terms of quality. Water quality can be assessed by the use of the water quality index (WQI).

Match with the search results: The calculation of WQI was made using weighed Arithmetic index method (Brown et al,1972) in the following steps: Let there be n water quality parameters and ……. read more

Author: www.mdpi.com

Date Submitted: 06/19/2019 09:42 AM

Average star voting: 4 ⭐ ( 70652 reviews)

Summary: HIGHLIGHTS. Evaluated five WQI based on six physico-chemical parameters to analyze their sensitivity toward selected location, type and frequency for data sampl

Match with the search results: WQI follows four steps: parameter selection, sub-indices, establishing weights, and final index aggregation, which are addressed in this review. However, the ……. read more

Author: www.youtube.com

Date Submitted: 06/15/2022 08:21 AM

Average star voting: 3 ⭐ ( 32807 reviews)

Summary: From the 2018 IRL Health Update: The WQI use the four water quality indicators: chlorophyll-a, TN, TP, and turbidity. The WQI was calculated for each sublagoon area by converting annual offsets to a percentage scale, resulting in a final score ranging from 0% to 100%.

Match with the search results: www.youtube.com › watch…. read more

Author: www.ncbi.nlm.nih.gov

Date Submitted: 01/27/2019 07:16 AM

Average star voting: 4 ⭐ ( 44942 reviews)

Summary:

Match with the search results: The two most common methods to aggregate the sub-indices are the additive (arithmetic) and multiplicative (geometric) methods. There are also ……. read more