Abstract
Probable Maximum Flood is considered as one of the most adopted inflow design floods in
assessing the adequacy of dam structure in current practices. It is the largest flood that could conceivably occur
at a particular location and frequently estimated from Probable Maximum Precipitation (PMP). This study
incorporates hydrological modelling using HEC-HMS to simulate the outflow providing the results used in the
catchment procedure of translation of PMP to PMFs for a 24 to 168-hour duration. The adequacy of Vaturu
Water Supply Dams (CA= 40 km2) which is located in Fiji will be assessed in the context of extreme
meteorological events of the PMP/PMF magnitude. The flood rise during these events should not exceed or
overtop the dam crest level. Vaturu dam is a domestic water supply embankment dam built in the 1980s to cater
for the water supply needs of the Nadi and Lautoka supply zones. A conventional reservoir routing procedure
using the Goodrich method is then carried out for all PMP/PMF durations, i.e., 24 to 168 hours. During this
period, flood rise levels were noted to be restricted to the Dam Crest level of +532 m ASL. The results and its
analysis validated the safety of the Vaturu Dam and the ability of the dam to discharge the onslaught of
PMP/PMF safely.
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Details
| Primary Language | English |
|---|---|
| Subjects | Engineering |
| Journal Section | Articles |
| Authors | |
| Publication Date | December 31, 2022 |
| Published in Issue | Year 2022 |
