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All Journal MEDIA KOMUNIKASI TEKNIK SIPIL
Suripin Suripin
Department of Civil Engineering, Diponegoro University
Civil Engineering, Building, Construction & Architecture

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Pemodelan Debit Banjir Rencana Berbasis Data Hujan Satelit pada Daerah Tangkapan Air Bendungan Meninting Dionysius Edna Hartyan; Suripin Suripin
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 30, Nomor 1 (2024)
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/mkts.v30i1.59024

Abstract

Rainfall stations around the Meninting Dam catchment area are very limited. Global Precipitation Measurement (GPM) satellite rainfall data can be utilized to fulfill the lack of rainfall data. This research aims to improve the quality of flood discharge in the Meninting Dam catchment area through rainfall data correction. GPM rainfall data was corrected using the probability curve method, while flood discharge analysis used HEC-HMS modeling. The results showed that the correlation coefficient of GPM rainfall data with Sesaot Rainfall Station was 0,73, the average HHMT error decreased by 2.99% after correction, and the correction factor level was 0-1,2 for each rainfall value range. The flood discharge (Q) of HEC-HMS modeling for each return period was obtained Q2th = 117,1 m3/sec, Q5th = 142,5 m3/sec, Q25th = 242,3 m3/sec, Q100th = 335,6 m3/sec, Q1000th = 529,3 m3/sec, and QPMF = 930,9 m3/sec.
Analisis Stabilitas Keamanan Bendungan Bili-Bili Mohammad Bagus Wiratama As'ad; Suripin Suripin; Dyah Ari Wulandari
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 31, Nomor 1 (2025)
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/mkts.v31i1.71170

Abstract

The Bili-Bili Dam located in Gowa Regency, South Sulawesi Province, is a rockfill dam with a central core, featuring a total storage capacity of 375 million m³ and sediment storage capacity of 29 million m³. Due to its high risk of structural failure, Bili-Bili Dam is classified as Class IV (Extreme). Recent developments have shown a decline in dam body stability due to seepage issues. If left unaddressed, this could trigger piping or even structural failure, posing a threat to the sustainability of the reservoir's functions. The objective of this study is to evaluate the safety factor (SF) of the main dam, right wing dam, and left wing dam as an integrated structural system of Bili-Bili Dam. The approach combines both qualitative and quantitative methods, including engineering geological assessments and Geostudio SEEP/W to analyze seepage rates and SLOPE/W to evaluate landslide potential. The analysis results indicate that seepage discharge remains within acceptable limits, and the dam’s stability under Operating Basis Earthquake (OBE) conditions is considered safe. However, under Maximum Design Earthquake (MDE) conditions, the slope safety factor does not meet the minimum standard required by SNI 8064:2016. Therefore, remedial actions such as reinforcement or retrofitting of the dam body are necessary.
Co-Authors Dionysius Edna Hartyan Dyah Ari Wulandari Mohammad Bagus Wiratama As'ad