Resistance of Loading Loads in Surabaya River and Its Branch with Qual2KW Model.

Abstract

Pollution of Surabaya River from year to year is increasing, the increase in pollution is the main problem of Surabaya River which is caused by the entry of most of the liquid waste from industrial, agricultural, and domestic activities. Continuous pollution can reduce water quality for rivers and creeks. One solution that can be applied to reduce the level of pollution is by calculating the capacity of pollution loads. This research was conducted to find out the quality of Kali Surabaya and tributaries of Surabaya River and the calculation of pollution load capacity with the QUAL2KW model. The study analysed the parameters of DO, BOD, COD, and phosphate. From the results of the study, the water quality values for Surabaya river and its branch were above the Class I quality standard Government Regulation Number 82 of 2010 and from the calculation results obtained the maximum capacity values BOD load were 23-1355 kg/day, and COD load were 23-6830 kg/days, while phosphate load were 2,5-125 kg/day.