Pemodelan banjir pada sistem saluran drainase Kecamatan Banjarsari, Surakarta, Jawa Tengah dengan aplikasi EPA SWMM 5.2

Abstract

Based on data from the Surakarta City Regional Disaster Management Agency in 2022, it was stated that there was flooding in the area in Kadipiro Village and Banyuanyar Village. Therefore, flood modeling was carried out in Banjarsari District to determine the effect of rain on flow discharge in drainage channels and flood modeling using EPA SWMM simulation. The rainfall design in this study was obtained by analyzing the distribution of Log Pearson III where the reage used was 5 years in accordance with the watershed area criteria. In addition, a distribution suitability test was carried out using Chi Square and Smirnov Kolmogorov, while to calculate the intensity of rain was carried out using the Mononobe and ABM methods. In conducting the analysis, it is assisted by the EPA SWMM application where this application can calculate both from the hydrological and hydraulic aspects. The results of this study are known that there are several drainages that are no longer able to accommodate water flow. The maximum discharge in the drainage channel is located at C7 Upstream (Hulu) of 10,021 m3/s. In addition, from the simulation, it is also known that the area is indeed flooded, this has also been confirmed by providing maximum flow or critical conditions in the outfall to ensure the flood event.