ANALYSIS OF DRAINAGE CAPACITY TO RESOLVE INUNDATION PROBLEM ON JEND. H. AMIR MACHMUD STREET CIMAHI CITY WEST JAVA PROVINCE

Abstract

Nowadays, water inundation often occurs in some areas in Cimahi. One of the highest
inundation occurred on Jenderal H. Amir Machmud street with a depth of 100 cm with the receding time 1 –
2 hours. This condition causes a very high level of congestion, so it can cut access from Bandung to Cimahi.
In addition, of course, this condition can cause damage to the road itself. Using a drainage cross-section data
from Cimahi government and field measurement, rainfall data, topographic map, and land use data the
existing drainage capacity can be calculated by manual and HEC-RAS. Based on the result of manual
calculation, there is total debit in drainage channel on 2 year return period is 2.86 m3
/sec, 5 year return period
is 3.59 m3
/sec, and a 10 year return period is 4.08 m3
/sec with the existing channel debit is 2.02 m3
/sec so that
cause the water overflows from the channel. The Cilember River flows with a large discharge 2 years period
is 59.64 m3
/sec, a 5 year return period is 93.74 m3
/sec, and 10 years 118.30 m3
/sec crossing Amir Machmud
Street affecting high inundation at the site of the review. To solve the problem, some models of solution have
been made in the form of new box culvert drainage channel planning with the smallest dimension is 2 × 2 m
and biggest dimension is 3 × 3 m. Meanwhile, to handle the overflow of water from Cilember River planned
2 pieces of culverts with dimensions 2.5 × 2.5 m.