IDENTIFYING URBAN FLOODS BASED ON HEC-RAS, SWMM, AND GOOGLE EARTH ENGINE
R M S Prastica[1]*, M A N Shulthony2, and A P Kinanti3
1Waterworks Construction Technology, Public Works Polytechnic, Ministry of Public Works and Housing, Semarang, Central Java, Indonesia
2Postgraduate student, Civil and Environmental Engineering Department, Faculty of Engineering, Universitas Gadjah Mada, Yogyakarta, Indonesia
3Water Resource Directorate, Ministry of Public Works and Housing, Jakarta, Indonesia
[1]*Corresponding author’s email: [email protected]
DOI: https://doi.org/10.20885/icsbe.vol4.art32
Abstract.
Urban water-related disasters are a commonly occurring event including in Indonesia. According to recent news, a watershed in South Sumatera submerged due to heavy rainfall and other factors. This study focuses on the Musi River, Palembang. It studied the two alternatives of flood mitigation in the Musi River system, namely hydraulics modification and green infrastructure landscape. The research methodology of the paper covers hydrological analysis, hydraulics, and slope stability calculation by using Google Earth Engine, 1-D HEC-RAS and Geo-Studio software, and green infrastructure simulation by employing SWMM analysis. The hydraulics modification appears to be able to lessen the flood in the watershed with a 100% reduction. Meanwhile, green infrastructure installation provides a 12.5% reduction in water volume in the study area. The government could opt after dealing with their infrastructure budgeting and environmental condition.
Keywords: Urban Floods, HEC-RAS, and SWMM
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