Evaluating the Quality of Water & Performance of WTPs in Iraq Using RII & TOPSIS Methods

The quality of drinking water is always considered the highest significant field for researchers worldwide as it has a direct impact on the population’s lives. In Fallujah city - Iraq, this research was conducted to evaluate the water quality & the overall performance of three water treatment plants WTPs. A survey was designed with a specific question related to the Water Quality (WQ) generally and the WQ Parameters (WQPs) particularly to identify the significance or the impact of the number of fourteen parameters that have a direct impact on the quality of drinking water. The survey was carried out with 32 experts working in the same field. The assessment of the WQPs in the survey was conducted based on the Likert scale of 1–7. The RII calculation was implemented on the primary weights to extract the more reliable weights required for the TOPSIS method. Then, the TOPSIS was executed using Octave software where three variables were identified and created which represent the decision matrix taken from the WQ testing results of these WTPs, the final weights generated using RII values, and the beneficial & non-beneficial values that were identified using the water quality parameters scale prepared for this research. The results of the TOPSIS method reveal that the final ranking over the six months showed that WTP-2 got the highest ranking for January and February 2021, while for March, April, May, and June WTP-3 got the highest ranking than WTP-1 & WTP-2.