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