PENANGANAN ABRASI PANTAI DESA SEI RAJA KABUPATEN SUKAMARA KALIMANTAN TENGAH
ABSTRACT: The problems of the
coastal area in Sei Raja Beach were retreat of the coastline, sedimentation in
river mouth of Raja River, destruction of existing shore protection structure
such as groin and jetty which was caused of wave. The objective of the final project
is to model and to design the right shore structures to protect the shore from
abrasion in Sei Raja Beach. The area which planned is around 3,1 km include the
river mouth of Raja River. The analysis result of waverose shows that dominant
wave comes from the south. It is about 68,61% from the data in 23 years. The
current movement pattern and tide is simulated by the SMS V.10 program (Surface
Water Modelling System). The prediction of coastline changed is simulated by
GENESIS (Generalized Model for Simulating Shoreline Change) with wave input
per-hour for a year. The shoreline protection is analyzed based on function and
economical value. The combination between revetment, jetty, groin and
breakwater is chosen to protect the shore of Sei Raja. The western revetment
are designed along 522 m and the eastern revetment are designed along 651 m.
The western revetment and the eastern revetment are made of concrete cube for
armour layer and crushed stone for core layer. Twins jetty which made of
concrete cubes for armour layer and crushed stones for secondary and core layer
are built with a length of 150 m. The groin is planed on the west side with the
length of 75 m. The groin is used of crushed stones for armour and core layer.
The existing breakwater is rehabilitated by adding concrete cubes.
Penulis: Mustofa Kamal Aziz,
Seruni Adidar Lesmi, Sumbogo Pranoto, Priyo Nugroho Parmantoro
Kode Jurnal: jptsipildd160245
