River Water Quality Assessment Model and Application Based on OWA Operator

Abstract

In this paper, ordered weighted averaging (OWA) operator proposed by Yager was introduced into field of river water quality assessment. Water quality assessment model based on improved OWA operator was established. First, the monitored water quality and water environment quality standard were ordered together. Secondly, the improved operator based on arithmetic progression (AP) was applied to build up with weight. Finally, the river water quality gradation was obtained by judging the relation between river water quality and water quality standard. The model was applied to assess the water quality in Caoqiao River. The results showed that the physical concept of the model was identified with easy calculation and objective and reasonable assessment results.