Analisis Beban Pencemaran Dan Indeks Kualitas Air Sungai Krengseng, Tembalang, Semarang

Diponegoro reservoir is a part of Development system of Diponegoro University. Development of Diponegoro reservoir function are flood control, groundwater supplies, and amusement park on Tembalang area. Krengseng River is one of river that flow to Diponegoro reservoir. The quality of water on the Krengseng river has effect to the quality of water on Diponegoro reservoir. Therefore, there is an analysis about waters quality of pollution load, waters quality, and pollution status on Krengseng River that will flow on Diponegoro reservoir. The purpose of this study is to calculate pollution load ( TSS, nitral, fosfat, and BOD) and also study the pollution load based on method of waters quality index. The material used in the study of water sample are taken from upstream, middle, downstream of Krengseng river and Diponegoro reservoir lipped. This method used method survey. The result obtained by analysis of Pollution load from Krengseng river and Diponegoro reservoir are TSS 1.464,53 tons/year, nitrat 36,88 tons/year, fosfat 15,13 tons/yearand BOD 385 tons/year. Pollution status of Krengseng River and Diponegoro reservoir are parts of upstream into low class pollution, middle downstream and reservoir into middle class pollution