Analysis of Pollution Load Capacity at Gladaksikur River in Kalisat Region Jember District

Abstract

Bedadung River has many tributaries, one of Gladaksikur Rivers. The tributaries have an important role to supply the water requirement. Therefore, it was necessary to measure pollution load capacity to determine the ability of the river to receive pollution load. Measurement of pollution load capacity can be solved by modeling using Streeter-Phelps method. Data for Streeter-Phelps modeling were discharged, dissolved oxygen (DO), and biological oxygen demand (BOD). The result of the research showed that Gladaksikur River had the biggest DO of 7.07 mg/l and BOD of 0.785 mg/l. The largest pollution load on the Gladaksikur River was in the fifth point of 110.92 kg/day. The pollution load of the Gladaksikur River was below maximum tolerated.The Gladaksikur River have an average BOD, deoxygenation rate, reaeration rate, critical point, critical distance and critical oxygen deficit, for all of parameters above were 0.602 mg/l, 0.056 mg/l.day, 6.351 mg/l.day, 0.451 day, 8,406 km, and 0,040 mg/l respectively. From the Streeter-Phelps modelling it can be stated that average re-aeration rate of 6,351 mg/l.day and de-oxygenation rate of 0,056 mg/l.day, the pollution load capacity of Gladaksikur River is still able to accept BOD load. The maximum BOD load that was allowed on the Gladaksikur River was 92.4 mg/l.