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ANALISIS PENGARUH HIDROLIKA SUNGAI TERHADAP TRANSPORT BOD DAN DO DENGAN MENGGUNAKAN SOFTWARE QUAL2E (STUDI KASUS DI SUNGAI KALIGARANG, SEMARANG )

*Winardi Dwi Nugraha  -  Environmental Engineering Department, Indonesia

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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.
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Keywords: BOD, DO, hydraulic, Kaligarang, QUAL2E

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