Open AccessDebit Banjir Rancangan DAS Tojo Metode HSS ITB 1
Author(s) -
Aswar Amiruddin,
Li Wang,
Triyanti Anasiru
Publication year - 2020
Publication title -
borneo engineering
Language(s) - English
Resource type - Journals
ISSN - 2581-1134
DOI - 10.35334/be.v4i2.1582
Subject(s) - hydrograph , flood myth , hydrology (agriculture) , watershed , return period , environmental science , 100 year flood , data collection , flooding (psychology) , statistics , geography , mathematics , computer science , engineering , geotechnical engineering , archaeology , psychology , machine learning , psychotherapist
Floods often occur in several regions in Indonesia. The problem is the flooding with its uncertain characteristics is one of the environmental problems that has not been handled optimally. The method of converting rain data into discharge data for flood analysis has been widely presented in previous studies. The methods used to analyze flood discharge also vary, starting from rational, empirical, statistical models to the unit hydrograph model. This research aims to determine the flood discharge design for return periods 2, 5, 10, 20, 25, 50, and 100 years in Tojo watershed, Tojo Una-una Regency using the synthetic unit hydrograph method of ITB-1. Research methods are data collection and data analysis. Data collection was carried out at several agencies and collecting from online sources. Results of this research design flood discharge that was analyzed by synthetic unit hydrograph of ITB-1 method. The maximum design flood discharge at Tojo watershed are 82.375m3/s for a 2-year, 98.21 m3/s for a 5-year, 104.77 m3/s for a 10-year, 111.83 m3/s for a 20-year, 113.3 m3/s for a 25-year, 118.87 m3/s for a 50-year, 123.86 m3/s for a 100-year return period