Journal
JOURNAL OF HYDROLOGIC ENGINEERING
Volume 16, Issue 5, Pages 434-446Publisher
ASCE-AMER SOC CIVIL ENGINEERS
DOI: 10.1061/(ASCE)HE.1943-5584.0000339
Keywords
Design hydrograph; Flood frequency analysis; Distributions with finite support; Baseflow separation
Funding
- Provincia di Viterbo
- Tiber River Basin Authority
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The primary characteristics that influence the potential of defining a synthetic design hydrograph (SDH), are the hydrograph shape, peak discharge (Qp), volume (V), and duration (D). This paper studies the advantages and shortcomings of using simple distribution functions with finite support (namely, beta and generalized standard two-sided power distributions) to represent and synthesize direct runoff hydrographs. The relationships among Qp, V, D, and distribution parameters are explored on a few flood events selected by a recursive digital filter algorithm and an overthreshold approach. The results obtained indicate that the adopted procedure provides a good compromise between simplicity and accuracy for building SDHs with two assigned flood characteristics (e.g., Qp and V) and a defined shape. DOI: 10.1061/(ASCE)HE.1943-5584.0000339. (C) 2011 American Society of Civil Engineers.
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