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Abstrak :
Setiap beban pengotoran organik yang masuk ke dalam sungai akan mengalami proses pemulihan alamiah ("self purification?). Kemampuan pemulihan diri tersebut berbeda untuk setiap sungai, bergantung pada kapasitas asimilasinya. Tujuan penelitian ini adalah untuk mengidentifikasi sumber pengotoran yang masuk ke sungai, yaitu limbah industri dan limbah penduduk serta perilakunya, mengidentifikasi kualitas air sungai serta perilakunya dan pengaruh sumber pengotoran terhadap kualitas air sungai, mengidentifikasi daya asimilasi air sungai dan hubungan antara daya asimilasi tersebut dengan beban limbah dan oksigen terlarut, serta merumuskan upaya-upaya pengelolaan lingkungannya.

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Normally, load of organic contaminants such as industrial waste or domestic waste discharged into a river will undergo a self-purification process. The ability to self purify depends on the river's assimilative capacity. The objectives of this research are as follows : First, to describe the source of contaminants discharged into the river, including industrial waste and domestic waste, and the characteristics of the contaminants. Second, to describe the river water quality and its characteristics. Third, to identify the influence of the contaminants on the river quality. Fourth, to identify the assimilative capacity of the river and the correlation between theassimilative capacity, the waste load and the dissolved oxygen (DO). Fifth, to formulate efforts for the purpose of managing the environment.