
The hydraulics analysis of the USBR stilling basin type of a dam under multiple flow discharge scenarios (A case study of Temef Dam, East Nusa Tenggara, Indonesia)
Author(s) -
Wiwik Yunarni Widiarti,
Retno Utami Agung Wiyono,
N J T Laksono,
Sri Eko Wahyuni
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/724/1/012043
Subject(s) - spillway , hydrograph , hydrology (agriculture) , structural basin , flood myth , hydraulic structure , hydraulics , flow (mathematics) , channel (broadcasting) , geotechnical engineering , environmental science , engineering , geology , geography , geomorphology , aerospace engineering , geometry , mathematics , archaeology , electrical engineering
Temef Dam was built to meet the needs of water supply and irrigation. Climate change and dam construction exaggerate security issues related to water resources. One important part of dam construction is the stilling basin, which can dissipate the energy from the discharge of the spillway and preserve the dam from flooding and degradation. The purpose of this study was to determine the most appropriate USBR stilling basin type under multiple flow discharge scenarios. The analysis involved 1) determining the designed flood hydrograph and 2) hydraulic analysis to select the USBR stilling basin. The study results showed that 1) analysis of the designed flood hydrograph for a 100-year return period up to the PMF showed values from 890 m 3 /second to 4300 m 3 /second and 2) the appropriate stilling basin is a USBR Type II. The results also presented detailed hydraulic structure calculations (stilling basin length = 47 m, stilling basin wall height = 15 m, steep channel blocks = 14 pieces, and indentation blocks = 9 pieces). This study is very useful because the right design will be able to ensure the smooth operation of the dam and prevent the dam from damage.