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Threshold effects in catchment storm response and the occurrence and magnitude of flood events: implications for flood frequency
| Content Provider | Semantic Scholar |
|---|---|
| Author | Kusumastuti, Dyah Indriana Struthers, Iain Sivapalan, Murugesu Reynolds, Donald A. |
| Copyright Year | 2006 |
| Abstract | The aim of this paper is to illustrate the effects of selected catchment storage thresholds upon runoff be- haviour, and specifically their impact upon flood frequency. The analysis is carried out with the use of a stochastic rainfall model, incorporating rainfall variability at intra-event, inter- event and seasonal timescales, as well as infrequent summer tropical cyclones, coupled with deterministic rainfall-runoff models that incorporate runoff generation by both satura- tion excess and subsurface stormflow mechanisms. Chang- ing runoff generation mechanisms (i.e. from subsurface flow to surface runoff) associated with a given threshold (i.e. sat- uration storage capacity) is shown to be manifested in the flood frequency curve as a break in slope. It is observed that the inclusion of infrequent summer storm events increases the temporal frequency occurrence and magnitude of surface runoff events, in this way contributing to steeper flood fre- quency curves, and an additional break in the slope of the flood frequency curve. The results of this study highlight the importance of thresholds on flood frequency, and provide in- sights into the complex interactions between rainfall variabil- ity and threshold nonlinearities in the rainfall-runoff process, which are shown to have a significant impact on the resulting flood frequency curves. |
| Starting Page | 1515 |
| Ending Page | 1528 |
| Page Count | 14 |
| File Format | PDF HTM / HTML |
| DOI | 10.5194/hess-11-1515-2007 |
| Volume Number | 11 |
| Alternate Webpage(s) | https://www.hydrol-earth-syst-sci.net/11/1515/2007/hess-11-1515-2007.pdf |
| Alternate Webpage(s) | http://hal.archives-ouvertes.fr/docs/00/29/87/82/PDF/hessd-3-3239-2006.pdf |
| Alternate Webpage(s) | https://www.hydrol-earth-syst-sci-discuss.net/3/3239/2006/hessd-3-3239-2006.pdf |
| Alternate Webpage(s) | https://hal.archives-ouvertes.fr/hal-00305089/document |
| Alternate Webpage(s) | http://hal.archives-ouvertes.fr/docs/00/30/50/89/PDF/hess-11-1515-2007.pdf |
| Alternate Webpage(s) | https://doi.org/10.5194/hess-11-1515-2007 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
