Repository Universitas Lampung

The Impact of Rainfall Variability and Hydrological Regimes on Flood Frequency

Kusumastuti, Dyah Indriana (2011) The Impact of Rainfall Variability and Hydrological Regimes on Flood Frequency. In: International Seminar on Water Related Risk Management, 15-17 Juli 2011, Jakarta.

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    Abstract

    Abstract: The aim of this paper is to investigates the impact of within-storm rainfall variability and catchment response time and how these interactions are critical in determining flood frequency. Using deterministic rainfall-runoff model, hydrological regimes ranging from fast to slow are identified on the basis of the catchment response time. The model uses generated hourly rainfall time series adapted to climatic condition in Lampung province coupled with a hypothetical catchment using catchment properties suitable to this region. This study highlights the importance of within-storm rainfall pattern in determining flood peaks, particularly in fast regime. It shows that the difference of flood peaks in fast regime resulted from low to high within-storm variability may reach up to 223 %, while those in slow regime resulted from low to high within-storm variability may reach up to 107 %. The results of this study provide insights into the complex interactions between rainfall variability and hydrological regimes in the rainfall-runoff process, which are shown to have a significant impact on the resulting flood frequency curves. Keywords: within-storm, rainfall variability, hydrological regime, flood frequency

    Item Type: Conference or Workshop Item (Paper)
    Subjects: T Technology > TA Engineering (General). Civil engineering (General)
    Divisions: Fakultas Teknik > S1 Teknik Sipil
    Depositing User: Admin Fakultas Teknik
    Date Deposited: 16 Nov 2015 14:31
    Last Modified: 16 Nov 2015 14:31
    URI: http://repository.unila.ac.id/id/eprint/804

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