Analysis of organic pollution load on the oxygenation rate at Sumbersari Kaliwates Segment of Bedadung River, Jember Regency

Abstract

Bedadung River is one of the main rivers in Jember Regency. The anthropogenic activities in the urban area segment (Sumbersari and Kaliwates District) that are directly related to the river have the potential to increase the burden of pollution. The resulting pollution load can potentially lower water quality. The purpose of this study is to analyze the water quality and the rate of deoxygenation and reoxygenation of the Bedadung River Segment in Sumbersari-Kaliwates District using the Streeter-Phelps method. Data input were streamflow, TSS, DO, BOD, and COD with grab sampling. The results of calculating the rate of deoxygenation and reoxygenation are synthesized using quantitative descriptive methods. The TSS and DO values meet the grade I of water quality standard, but the BOD and COD values do not meet the standard. The mean deoxygenation rate (rD) and reoxygenation (rR) were 0.798 mg/L.day and 2.753 mg/L.day, respectively. The value of the reoxygenation rate is greater than the value of the deoxygenation rate. These findings indicate that ability of Bedadung River to reduce organic matter naturally is still in a good performance. The size of rR and rD is influenced by the reoxygenation constant, deoxygenation constant, and the hydraulic profile of the river.