An Enhanced Beetle Antennae Search Algorithm Based Comprehensive Water Quality Index for Urban River Water Quality Assessment

Urban river not only has the important function in urban hydrological environment, but also is an area for entertainment. Water quality assessment core technique water resource management. As typical river, samples were collected at 5 sampling points Xi’an moat from January 2018 to December 2020, and 10 physicochemical parameters analyzed. In this paper, a comprehensive index (WQI) designed based on criterion of classes entropy weight method firstly. Secondly, crucial determined by using mutual information, coefficient variation difference. Finally, enhanced beetle antennae search algorithm proposed optimize values range 0 1, which represent ratio parameter minimum WQI (WQImin) model. The WQImin models with different number are implemented assessment. effectiveness superiority validated comparison other evolutionary algorithms. results show that model can assess accurately.