Commonly, WQI models involve four consecutive stages; these are (1) selection of the water quality parameters, (2) generation of sub-indices for each parameter (3) calculation of the parameter weighting values, and (4) aggregation of sub-indices to compute the overall water quality index. ...
The descriptive statistics of all parameters are presented in Table 1 along with WHO Guidelines (WHO, 2011) and parameters for WQI calculation. Water quality status The results of the physico-chemical parameters of the water samples were within the prescribed WHO guidelines (Table 1). The mean ...
No criterion for protection of human health from consumption of aquatic organisms excluding water was presented in the 1980 criteria document or in the 1986 Quality Criteria for Water. Nevertheless, sufficient information was presented in the 1980 document to allow the calculation of a criterion, even...
The WQI calculation methods have significantly enhanced water quality determination, monitoring, and evaluation in recent times. Thus, it's crucial to recognize the value these methods bring to water quality management and regulatory decisions. Numerous studies have employed the WQI to assess surface ...
Calculation of water quality index Among water quality indices, the National Sanitation Foundation Water Quality Index (NSF-WQI) is the most commonly used39,40,41. The significance of numerous parameters using this index varies based on the use of water. Therefore, the used values include the ...
Al Obaidy AHMJ, Talib AH, Zaki SR (2015) Application of Water Pollution Index for assessment of Tigris River ecosystem. Int J Adv Res 3(2):219–223 CAS Google Scholar Proskurnin OA, Komaristaja BN, Smirnova SA (2015) Calculation of the surface Water Pollution Index in the evaluation...
parameters, an informationentropymethodwasusedtoassignweighttoeachparameter.Calculationofentropyweightedwaterqualityindex(EWQI)forgroundwatersamplesshowedthatinthewetseason,over57 and 74 % of samples were in the range of ‘‘excellent’’ to‘‘medium’’ quality based on WHO and Iranian standards,...
8. Calculation 8.1 Calculate the silt density index (SDI T ) as follows: SDI T 5 % P 30 T 5 F 1 2 t i t f G 100 T where: % P 30 = percent at 207 kPa (30 psi) feed pressure, T = total elapsed flow time, min (usually 15 min, see ...
The calculation of water scarcity indicator is presented in Eq.1.The numerator represent the acceptable quality water withdrawals and includes the required water withdrawals \(({D}_{j,m}-{{TS}}_{j,m})\), where \({D}_{j,m}\) is water demand and \({{TS}}_{j,m}\) is water ...
The authors38considered that, for the proper use of the WQI- CCME, it is necessary to define the time period for water quality evaluation, the choice of variables to use, and the objectives for the index calculation, as the factors (F1, F2) that compose the index, can vary when few va...