Abstract
Aquaculture has become one of the major causes of Lake Eutrophication due to the lack of direct and efficient technologies for pollution control and remediation. Water samples were collected on February 2018 and March 2019 under floating net cages (depth 4 m) in each farm (Maninjau, Koto Kaciek, Intake PLTA, Sungai Batang areas) using a Kemmerer Water Sampler with the volume is 1200 mL. This tool was used to the determination the water quality parameters which measured based on the standard procedures APHA (1995). Water transparency was measured using a Secchi disk. The Storet method was used to analyze the water quality status. The capacity of water pollution load and the trophic status of Maninjau Lake were analyzed with the formula of the Minister of Environment Regulation No. 28/2009 concerning the capability of Lake and/or Reservoir Water Pollution. The results of the research prove that the water quality status of Maninjau Lake categorize in class one to three, which is heavy pollutant, and class 4 is mild polluted. The capacity of Lake water pollution load based on feed quota in the year 2019 is 9,736.23 tons/year with fish production is 6,490.82 tons/year which is equivalent with 4,327 net cages. While, the trophic status of Maninjau Lake was categorize as hypereutrof.
Published Version
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