Open AccessHydrodynamic Modelling of Juwana River Flooding Using HEC-RAS 2D
Author(s) -
Rifki Randa Syafri,
M. Pramono Hadi,
Slamet Suprayogi
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/412/1/012028
Subject(s) - hydrology (agriculture) , flooding (psychology) , watershed , hydrograph , drainage basin , period (music) , return period , geology , structural basin , environmental science , flood myth , geography , geomorphology , archaeology , cartography , geotechnical engineering , psychology , physics , machine learning , computer science , acoustics , psychotherapist
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 m 3 /with the inundated area of 22898.54 Ha, 1401.7 m 3 /with the inundated area of 25558.51 Ha, 1541 m 3 /with the inundated area of 26916.42 Ha, 1704.9 m 3 /with the inundated area of 28411.52 Ha, 1819.9 m 3 /with the inundated area of 29905.85 Ha, and 1930 m 3 /with the inundated area of 30785 Ha respectively.