Analisis Pengaruh Hidrolika Sungai Terhadap Transport BOD Dan DO Dengan Menggunakan Software QUAL2E (Studi Kasus Di Sungai Kaligarang, Semarang )

Abstract

People and industrial activity along Kaligarang River increase day by day, cause load of river increase too. River has many function to support human life, so monitoring of river is needed Monitoring of river water quality in some places need many expenses and can not give information abaout water quality comprehensively. That is why, it’s needed a water quality modeling for river. In this case, it’s used Qual2E one of the water quality modeling software. To use the software related to the river characteristic, it’s still needed to justify some of coefficients and get validation related to reaction pattern among the constituent, hydraulic condition, and hidrology aspects. The research is proposed to see the process of calibration of model related to the justification of coefficient.And so, to analyze the influence of hydraulic aspects of river to the BOD and DO pattern. It’s needed the secondary data, i.e. water quality sampling, climatlogy, hydrology (discarge of river), river hydraulic aspects, map, point source.The calibration is done related to the data and coefficient of the model to get the suitable model used Kaligarang River. This calibrated model is validated by the secondary data, i.e. water quality sampling from Bappedal Province of Central Java. And the get simulation with the various of hydraulic aspects, i.e. “n” number of Manning, cross section, and the influence of Simongan dam. The conclusions of the research say that there are influences and relationships of hydraulic aspects to the BOD and DO pattern.