River water quality management using a fuzzy optimization model and the NSFWQI Index

Metadatas

Date

January 1, 2021

Discipline
type
Language
Identifier
Source

Water SA

Organization

SciELO



Similar subjects En

Pattern Model

Cite this document

Mohammad Kazem Ghorbani et al., « River water quality management using a fuzzy optimization model and the NSFWQI Index », Water SA, ID : 10670/1.e7bbb3


Metrics


Share / Export

Abstract 0

In this study, a novel multiple-pollutant waste load allocation (WLA) model for a river system is presented based on the National Sanitation Foundation Water Quality Index (NSFWQI). This study aims to determine the value of the quality index as the objective function integrated into the fuzzy set theory so that it could decrease the uncertainties associated with water quality goals as well as specify the river's water quality status rapidly. The simulation-optimization (S-O) approach is used for solving the proposed model. The QUAL2K model is used for simulating water quality in different parts of the river system and ant colony optimization (ACO) algorithm is applied as an optimizer of the model. The model performance was examined on a hypothetical river system with a length of 30 km and 17 checkpoints. The results show that for a given number of both the simulator model runs and the artificial ants, the maximum objective function will be obtained when the regulatory parameter of the ACO algorithm (i.e., q0) is considered equal to 0.6 and 0.7 (instead of 0.8 and 0.9). Also, the results do not depend on the exponent of the membership function (i.e., y). Furthermore, the proposed methodology can find optimum solutions in a shorter time.

document thumbnail

From the same authors

On the same subjects

Within the same disciplines

Export in