Hydrodynamic Modelling of Juwana River Flooding Using HEC-RAS 2D

On the equator, Indonesia had very complex geographical, geological, hydrological conditions. It was also traversed by three large plates namely the Eurasian plate, the Indo-Australian plate, and the Pacific plate. Because of the colliding meeting of the three plates, the territory of Indonesia had...

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Published inIOP conference series. Earth and environmental science Vol. 412; no. 1; pp. 12028 - 12039
Main Authors Syafri, Rifki Randa, Hadi, Muhammad Pramono, Suprayogi, Slamet
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.01.2020
Subjects
Discharge
Equator
Equatorial regions
Flood frequency
Flooding
Floods
Frequency analysis
Hydrograph analysis
Hydrology
Lowlands
Modelling
Mountains
Overflow
Plateaus
Plates (tectonics)
Rivers
Two dimensional models
Unsteady flow
Indonesia
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Summary:On the equator, Indonesia had very complex geographical, geological, hydrological conditions. It was also traversed by three large plates namely the Eurasian plate, the Indo-Australian plate, and the Pacific plate. Because of the colliding meeting of the three plates, the territory of Indonesia had a variety of topography ranging from hills, mountains, plateaus, lowlands, and basins. The basin found in the Juwana watershed caused frequent flooding every year due to the overflow of Juwana River. The river passed through Kudus and Pati. In the last ten years there had been 179 floods in Juwana River. This study aimed to examine the discharge and distribution of floods based on the return period of floods 2, 5, 10, 25, 50 and 100 years. The research method used was frequency analysis, snyder synthetic unit hydrograph analysis, and hydrodynamic modelling using HEC-RAS 5.0.6 2D (two dimention) with unsteady flow. The findings indicated that on the return period of floods 2, 5, 10, 25, 50, and 100 years, the discharge and distribution of floods were 1169.2 m3/with the inundated area of 22898.54 Ha, 1401.7 m3/with the inundated area of 25558.51 Ha, 1541 m3/with the inundated area of 26916.42 Ha, 1704.9 m3/with the inundated area of 28411.52 Ha, 1819.9 m3/with the inundated area of 29905.85 Ha, and 1930 m3/with the inundated area of 30785 Ha respectively.
ISSN:1755-1307
1755-1315
DOI:10.1088/1755-1315/412/1/012028