Kajian Hubungan Antara Fitoplankton dengan Kecepatan Arus Air Akibat Operasi Waduk Jatiluhur

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ABSTRACT: Study on The Relationship Between Phytoplankton and Current Velocities due to Operation of Jatiluhur Reservoir. High abundance of phytoplankton may create oxygen depletion within water column, in which may also lead as a threat to the fisheries activities of floating cage in the Jatiluhur reservoir. In addition, phytoplankton may also clog the filter within water treatment plant that is currently using the water from Jatiluhur reservoir. The research objective was investigate effects of changing water current velocity to the abundance of phytoplankton in the Jatiluhur reservoir. Phytoplankton, measured as chlorophyll-a, were sampled at 10 different sampling points of 0, 4, 8 and 10 m depth. While current water velocities were calculated usingtwo-dimensional multilayer equation. The equation will calculate x and y axis current velocitieswithin different depth of the reservoir. Result shows that in the area in which the current velocities higher than 15 cm/s less phytoplankton would be found. These velocities found if the operation of water discharge from reservoir was more than 70 m3/s. The research suggests that discharging operation from reservoir can be used as an indicator for the early warning system for the fisheries activities in the reservoir.
Keywords: Jatiluhur reservoir, current velocity, phytoplankton abundance, reservoir operation, two-dimensional multilayer equation
Penulis: Eko Harsono
Kode Jurnal: jpbiologidd110312

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Jp Biologi dd 2011