Abstract:
ABSTRACT :
The initial indication of this research was carried out by the occurrence of floods that was correlated with the
conditions of the slum settlements in Cempaka Sub District, narrowing and silting of the river, as well as the
rainfall that fell beyond the carrying capacity of the river geometry in that area. The goverment is concerned
about the inability of existing drainage network system to accommodate and drain the water, causing a flood
problem that impact to human settlements. A recommendation was given for the drainage channel design in the
form of sodetan using box culvert in an effort to deal with flood problems that every year hit residential area in
Cempaka Sub District. The work process is by dividing the planned flood discharge in the existing river channel
with a cross sectional capacity of the Kuranji River of 24.912 m
3
/s, which means that there is a runoff of 11.704
m
3
/s. The runoff flood discharge is flowed through sodetan using box culvert with capacity of 13.032 m
/s. From
the results of the financial feasibility analysis using net present value, benefit cost ratio, and internal rate of
return method with an interest rate of 9.90% based on cash flow obtained from the value of losses for flood
affected humans that investment in the sodetan development project uses box culvert in the size 1.5 m × 1.5 m is
declared feasible and enforceable.
