Envelope curves for the specific discharge of extreme floods in Malaysia

Jazuri Abdullah, Nur Shazwani Muhammad, Siti Asiah Muhammad, Pierre Y. Julien

Research output: Contribution to journalArticle

Abstract

The relationship between peak specific discharge and watershed area is examined for large, rare and extreme floods in Malaysia using a distributed hydrological model. Envelope curves for specific discharge for these events and the uncertainty is quantified. The relationships between rainfall duration and intensity as a function of watershed size were also examined. As a result, three main regions were defined to estimate the peak discharge as a function of watershed size for large, extreme and rare floods. The average magnitudes for the PMP and the world's extreme rainfall events were 5 and 12 times larger than the 100-year event, respectively. The envelope curves may assist engineers and other interested parties to estimate the peak discharge for watershed up to 100,000 km2, especially for ungauged watersheds.

Original languageEnglish
Pages (from-to)1-11
Number of pages11
JournalJournal of Hydro-Environment Research
Volume25
DOIs
Publication statusPublished - 1 Jun 2019

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Watersheds
watershed
peak discharge
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rainfall
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Keywords

  • Extreme rainfall events
  • Hydrological modelling
  • Large watershed
  • Maximum estimated discharge
  • Peak specific discharge
  • PMP
  • Rainfall duration

ASJC Scopus subject areas

  • Environmental Engineering
  • Civil and Structural Engineering
  • Environmental Chemistry
  • Water Science and Technology
  • Management, Monitoring, Policy and Law

Cite this

Envelope curves for the specific discharge of extreme floods in Malaysia. / Abdullah, Jazuri; Muhammad, Nur Shazwani; Muhammad, Siti Asiah; Julien, Pierre Y.

In: Journal of Hydro-Environment Research, Vol. 25, 01.06.2019, p. 1-11.

Research output: Contribution to journalArticle

Abdullah, Jazuri ; Muhammad, Nur Shazwani ; Muhammad, Siti Asiah ; Julien, Pierre Y. / Envelope curves for the specific discharge of extreme floods in Malaysia. In: Journal of Hydro-Environment Research. 2019 ; Vol. 25. pp. 1-11.
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