POLA PENGENDALI BANJIR PADA SUNGAI TENGGANG
KECAMATAN GENUK KOTA SEMARANG DENGAN MENGGUNAKAN
METODE HEC-RAS
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Institusion
Universitas PGRI Semarang
Author
Aini, Indah Nur
Filjanah, Qoiliyah
Filjanah, Qoiliyah
Subject
L Education (General)
Datestamp
2024-11-20 03:53:42
Abstract :
Tenggang River is part of the East Semarang Drainage System, whose flow area extends from the East Flood Canal in the west to the Babon River in the east. The frequent occurrence of flooding in the Tenggang River has several factors, namely the limited river capacity due to sedimentation, land subsidence rates, seawater tides and overflows from the surrounding rivers. The frequent occurrence of flooding in the Tenggang River is very interesting to study in depth in order to find a solution. The purpose of this control pattern is to determine the water level during the rainy season, calculate the river capacity using Hec-ras, and the method of handling the Tenggang river flood. Research on flood control patterns in the Tenggang river, begins with primary data collection which includes river characteristics and geometry data, and secondary data consisting of rain station data, maximum daily rainfall data, and watershed characteristics data which are analyzed into the Unit Hydrograph method. Synthetic, HEC-RAS. In calculating the flood discharge design, rainfall data, river measurement data, andrequired river conditions are. Based on these data, it can be calculated rainy days plan for 2,5,10,20,25 and 50 years with the analysis of the frequency distribution of rainfall such as Normal Distribution, Normal Log Distribution, Log Pearson III Distribution and Gumbel Distribution, so the Pearson III Log Distribution analysis was chosen closer and more thorough. Based on data processing with the Nakayasu method, the peak flood discharge (QP) value is 2.35 m3/second and Q10 is 28.94 m3/second, Q25 is 31.93 m3/second and Q50 is 34.20 m3/second. The flood discharge data for the Q50 return period is then modeled and simulated in the Hydrologic Engineering Center River Analysis System (HEC-RAS) Version 4.0 software. Keywords: Tenggang River, Flood Analysis, HEC-RAS
Tenggang River is part of the East Semarang Drainage System, whose flow area extends from the East Flood Canal in the west to the Babon River in the east. The frequent occurrence of flooding in the Tenggang River has several factors, namely the limited river capacity due to sedimentation, land subsidence rates, seawater tides and overflows from the surrounding rivers. The frequent occurrence of flooding in the Tenggang River is very interesting to study in depth in order to find a solution. The purpose of this control pattern is to determine the water level during the rainy season, calculate the river capacity using Hec-ras, and the method of handling the Tenggang river flood. Research on flood control patterns in the Tenggang river, begins with primary data collection which includes river characteristics and geometry data, and secondary data consisting of rain station data, maximum daily rainfall data, and watershed characteristics data which are analyzed into the Unit Hydrograph method. Synthetic, HEC-RAS. In calculating the flood discharge design, rainfall data, river measurement data, andrequired river conditions are. Based on these data, it can be calculated rainy days plan for 2,5,10,20,25 and 50 years with the analysis of the frequency distribution of rainfall such as Normal Distribution, Normal Log Distribution, Log Pearson III Distribution and Gumbel Distribution, so the Pearson III Log Distribution analysis was chosen closer and more thorough. Based on data processing with the Nakayasu method, the peak flood discharge (QP) value is 2.35 m3/second and Q10 is 28.94 m3/second, Q25 is 31.93 m3/second and Q50 is 34.20 m3/second. The flood discharge data for the Q50 return period is then modeled and simulated in the Hydrologic Engineering Center River Analysis System (HEC-RAS) Version 4.0 software. Keywords: Tenggang River, Flood Analysis, HEC-RAS
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