PERENCANAAN SISTEM DRAINASE KALI KENDAL
ABSTRACT: Kendal river is
always overtopped during rainy day, certainly in central city and densely
populated area. The flood duration around 4-8 hours with 40-60 cm depth caused
the secondary channel can’t flow into the primary channel. The problem of flooding
caused by the capacity of Kendal River is decreasing. Base on that condition,
this final project was aimed to redesign Kendal River system based on capacity
and functionality. The first step on redesign drainage system is hidrology
analysis for determining a flood discharge, analysis hidrolic analysis by
HEC-RAS software to evaluate the capacity exsisting channel. The conclution of
the evaluation result is the maximum channel capacity could be increased to 10
years discharge flood only (34,94 m3/s). Increase the capasity of the trapezium
channel by enlarge a basis channel along 10 m at Kendal River (11,750 m),
include the revetment construction (2,300 m) on P.5+050 – P.10, P.11 - P.12,
P.13+050 - P.15, P.44+050 - P.45+050, P.65 - P.80. Anchored wall construction
decided as a retaining wall for a rectangular channel type (2,050 m) at P.24 -
P.4+050. And then, for accomodate 25 years flood discharge (45,43 m3/s) need 7
ha retention pond. Total cost is Rp. 63,847,420,000,00 for 10 years discharge
desain.
Penulis: Sukma Adji Nugrahedi,
Adi Saputra, Suripin, priyo Nugroho P.
Kode Jurnal: jptsipildd140534
