PERENCANAAN SUDETAN UNTUK PENANGGULANGAN GERUSAN TEBING DI SUNGAI LUSI
ABSTRACT: Flood is a condition
in which the rain water runoff is not able to be streamed by a river due to
water discharge flow exceeds the capacity flow over to to areas that are not as
functions. The problem of flooding that occurred in the village of Kendayaan
Ngawen Blora caused by Lusi River overflow. At the area meandering river
channel (meander) so that when the flood discharge causes overflow and bank
scouring. To overcome these problems planned for river shortcut and checkdam.
Shortcut serves to divert the flow of water so it does not happen again
outburst floods. While checkdam serves to reduce bank scouring due to the speed
that is too high after the river shortcut design. The maximum discharge of the
river with a certain return period is calculated by using the method of
Melchior, FSR Java-Sumatra, Flood Marking and Passing Capacity. Obtained from
the calculation of flood discharge plan (Q50) of 622 m3/s. Then proceed
calculations using HEC-RAS software to determine the impact of the flood
discharge plan to the cross section of the river, so that it can be seen a part
of the river that needs to be repaired. Part of the river needs to be fixed is
at (STA L.610-L.613) along the ± 810 m. The repair process is done by river
shortcut design while maintaining the existing river channel. Flood discharge
flow divider discharge shared use of the building to the proportion of 500 m3/s
in shortcut and 122 m3/s on existing groove. With the second building above
expected flood in the village Kendayaan can be controlled.
Penulis: Aedo Radewa Nayapada,
Suwarto Hari Sulakso, Pranoto Sapto Atmojo, Hari Nugroho
Kode Jurnal: jptsipildd150153
