Analisis Debit Banjir Saluran Drainase Di Perumahan Semarang Indah Menggunakan Simulasi EPA SWMM (Storm Water Management Model

Abstract

Unsustainable urban development led to catastrophic flooding.
Increasingly apparent climate change will trigger greater natural disasters.
Therefore, the capability of drainage infrastructure must always be reviewed
periodically. The purpose of this study is to examine drainage channels with a
certain repeat time and to compare numerical measurements with measurements in
the field.
For numerical simulations using EPA SWMM software while field
measurements use excell calculations. Calculation of hydrological analysis using
return periods of 2, 5, and 10 years. The steps taken are the calculation of the lost
rainfall data using the Normal Comparison Method, the analysis of the consistency
of the rain data using the Multiple Mass Curve Method, the calculation of the
average rainfall using the Thiessen Polygon Method, the frequency analysis using
the Log Pearson III method, and the data consistency test using the Chi-Square Test.
and Smirnov-Kolmogorof test, and rainfall intensity using the Mononobe method.
Based on the results of the drainage channel evaluation study, rain
discharge with a 2-year repeat period of 12.223 mm3 / second was obtained. The
results of the evaluation of the existing channel measurements in the field are 0.6
m high and 0.5 m wide, because the drainage channel in the area is most likely the
same average channel. From the results of numerical measurements, the discharge
produced on the channel is 1.6404 m3 / second. The results of the synchronization
of the evaluation of numerical simulations used in this study with field
measurements are the same, so the numerical simulations in this study are relevant
to be used for drainage channel simulations.