ANALISIS SEDIMENTASI DI MUARA SUNGAI ROKAN PROVINSI RIAU
ABSTRACT: The
research were conducted in River estuary of Rokan, Riau Province on Mei 2014.
Sedimentation analysis were investigated by various method i.e, sedimen
grain-size analysis, Total suspended solid analysis, mechanism of particle
disseminated, river’s sediment transport analysis, longshore sediment transport
analysis, coastline chance analysis and absolute sedimentation velocity. The
research was aim to explained sedimentation procces covered mechanism of
sediment transport and sedimentation rate, and then could be able to gave the
solution for preventive study of River estuary of Rokan Sedimetation.
The result of grain-size analysis showed that mean size were dominated by
find sand, sorted by poorly sorted. The disseminated of sediment in deep water
was tended to very fine skewed dan skin-deep was very coarse skewed. Mechanism
of disseminated particle result when tide, find sand sediment was transport as
128,52 m to the south-east in 23,33 minute. On the contrary to the northwest as
88,10 m in 16 minute. Very find sand was transport as 82,59 m to the south-east
in 15 minute at tide and on the contrary to the northwest as 67,12 m in 11,27
minute. Total Sediment Transport Formulae showed 137.023 m3/year of sediment
transport was occurred, while longshore sediment transport was 33.616.808,53
m3/year at the River estuary of Rokan. The coastline chance showed addition of
land at the estuary was 240.096.862,77 m2 , accretion was 280.492.425,46 m2,
and abration was 27,935,195.86 m2. From sediment total calculation in a year
comparing by 60 years accretion showed, the absoluted sedimentation velocity
was 0,19 cm/year. It was low, so that concluded the contriction of estuary by
accretion.
Keywords: sedimentation,
sediment, River estiary of Rokan
Penulis: Jannata Rahmad Putra,
Rifardi, Mubarak
Kode Jurnal: jpperikanandd160507