Publication:
Assessing dam spillway discharge capacity in response to extreme floods in Perak river hydroelectric scheme: Simulation and proposed mitigation measures

Simple item page
dc.citedby3
dc.contributor.authorAzha S.F.en_US
dc.contributor.authorSidek L.M.en_US
dc.contributor.authorKok K.en_US
dc.contributor.authorAhmad S.A.en_US
dc.contributor.authorSaman D.H.en_US
dc.contributor.authorAllias Omar S.M.en_US
dc.contributor.authorBasri H.en_US
dc.contributor.authorZawawi M.H.en_US
dc.contributor.authorAhmed A.N.en_US
dc.contributor.authorid56166798400en_US
dc.contributor.authorid35070506500en_US
dc.contributor.authorid55812179300en_US
dc.contributor.authorid58679834900en_US
dc.contributor.authorid58679062000en_US
dc.contributor.authorid58025195200en_US
dc.contributor.authorid57065823300en_US
dc.contributor.authorid39162217600en_US
dc.contributor.authorid57214837520en_US
dc.date.accessioned2024-10-14T03:17:42Z
dc.date.available2024-10-14T03:17:42Z
dc.date.issued2023
dc.description.abstractThe aged dams in Perak river Hydro-Electric Scheme (HES) have been constructed decades ago and a common concern raised during dam safety reviews is that they were not designed to safely reroute the Probable Maximum Flood (PMF) but rather the Inflow Design Flood (IDF) of 1,000 years� design floods. Failure due to the insufficient spillway discharge capacity has been identified as one of the primary causes leading to overtopping. This applied research has thus been initiated to evaluate the spillway discharge capacity of dams in response to PMF extreme flooding. Besides, the safety of the dams has been evaluated by calculating the highest flood level achieved in response to the specified extreme floods. In order to simulate PMF hydrographs, various durations of Probable Maximum Precipitation (PMP) have been calculated using Hershfield statistical approach based on historical annual maximum rainfall statistics. Using a calibrated and validated hydrological model developed in HEC-HMS, PMF simulation was performed. It was discovered that the PMF generated at 120 hrs (5 days) resulted in the maximum flood level for all dams/reservoirs. The achieved highest PMF flood levels are still lower than the designated dam core and crest level in respective dams, indicating that the dams in Perak river HES are safe from overtopping failures during the occurrences of extreme events up to PMF level. While routing the worst-case scenario over 120 hr, the maximum spillway discharges predicted for Temengor and Bersia are beyond their design capacity, while Kenering and Chenderoh remain within design limits. Mitigation that will be implemented to minimize the possibility of risks to occur include improvement of emergency management system and dams monitoring data collection. It is anticipated that the outcomes of this applied research will be adopted for development of Risk Informed Decision Making (RIDM) frameworks for dams in Perak river HES in future. � 2023 THE AUTHORSen_US
dc.description.natureFinalen_US
dc.identifier.ArtNo102540
dc.identifier.doi10.1016/j.asej.2023.102540
dc.identifier.issue11
dc.identifier.scopus2-s2.0-85175606061
dc.identifier.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85175606061&doi=10.1016%2fj.asej.2023.102540&partnerID=40&md5=bfb11bcf35c9842417bfec3a42597828
dc.identifier.urihttps://irepository.uniten.edu.my/handle/123456789/34027
dc.identifier.volume14
dc.publisherAin Shams Universityen_US
dc.relation.ispartofAll Open Access
dc.relation.ispartofGold Open Access
dc.sourceScopus
dc.sourcetitleAin Shams Engineering Journal
dc.subjectMitigation Measures
dc.subjectOvertopping Failures
dc.subjectPerak River HES
dc.subjectProbable Maximum Flood (PMF)
dc.subjectProbable Maximum Precipitation (PMP)
dc.subjectSpillway Discharge Capacity
dc.subjectWater Energy Security
dc.subjectDams
dc.subjectDecision making
dc.subjectEnergy security
dc.subjectFailure (mechanical)
dc.subjectFloods
dc.subjectInformation management
dc.subjectRain
dc.subjectRisk management
dc.subjectSafety engineering
dc.subjectSpillways
dc.subjectDischarge capacities
dc.subjectHydro electric
dc.subjectMitigation measures
dc.subjectOvertopping failures
dc.subjectPerak river hydro-electric scheme
dc.subjectProbable maximum flood
dc.subjectProbable maximum floods
dc.subjectProbable maximum precipitation
dc.subjectSpillway discharge capacity
dc.subjectWater energy
dc.subjectWater energy security
dc.subjectRivers
dc.titleAssessing dam spillway discharge capacity in response to extreme floods in Perak river hydroelectric scheme: Simulation and proposed mitigation measuresen_US
dc.typeArticleen_US
dspace.entity.typePublication
Files
Collections
SCOPUS