Almodóvar-Rosario, Natalia

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Regionalized flood frequency analysis for basins in Puerto Rico
(2012) Almodóvar-Rosario, Natalia; Segarra-García, Rafael; College of Engineering; Nazario Ramírez; Rivera Santos, Jorge; Department of Civil Engineering; Collins, Dana
The main goal of this research is to provide a flood regionalization study for Puerto Rico based on recent advances in watershed classification and parameter estimation techniques. The regional flood frequency was achieved using the “index-flood” procedure in combination with the regional L-moment algorithm. The main assumption of the “index flood” procedure is that sites form a homogeneous region, and for this matter the heterogeneity measure based on L-statistics were used to determine the homogeineity of a region. The hybrid cluster analysis was used as a regionalization procedure to group inland streams into four clusters using physical and climatological characteristics of the basins. Relative root mean square error values lower than 1% demonstrated the high accuracy in the procedure to estimate the quantile curves for the regions. The procedure recommended to estimate quantiles for ungaged basins couples the relationship between the derived regional growth curves and the estimated mean peak streamflow at site.