Study of design discharge and river capacity in Celeng Sub-watershed, Special Region of Yogyakarta

Celeng sub-watershed is a catchment area located in the Oyo watershed. This catchment has circular shape which is situated in the alluvial plain. In the 2018, there was a huge flood occurred in the area that was triggered by Savana Cyclone. The cyclone itself contributed in extreme precipitation, re...

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Published inIOP conference series. Earth and environmental science Vol. 451; no. 1; pp. 12075 - 12083
Main Authors Abadi, A W, Astuti, B I D, Kurniasari, Siahaan, Y V O, Jamil, U A, Widyaningrum, W, Jatti, A P, Putri, N H, Astabella, R D, Pratiwi, C B I, Ayumi, N, Hayat, D M, Putra, J H, Putri, R F
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.03.2020
Subjects
Alluvial plains
Catchment areas
Cyclones
Design
Discharge
Evaluation
Extreme values
River banks
Rivers
Watersheds
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Summary:Celeng sub-watershed is a catchment area located in the Oyo watershed. This catchment has circular shape which is situated in the alluvial plain. In the 2018, there was a huge flood occurred in the area that was triggered by Savana Cyclone. The cyclone itself contributed in extreme precipitation, resulted in high discharge in a very short time, and spilled over the riverbank. The research aims (1) to analyze the discharge capacity in the Celeng sub-watershed, (2) to determine the design discharge of Celeng sub-watershed for 2, 5, 10, and 25 years return period, and (3) to evaluate whether the design discharge excess the Celeng river capacity or not. The research uses quantitative analysis through rational method and slope area method. The design discharge measured by rational method and applied to evaluate the river capacity along with rational method. The result shows that the area does not experience flood in all return period.
ISSN:1755-1307
1755-1315
DOI:10.1088/1755-1315/451/1/012075