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Paleoflood Hydrology, New Approach of Modern Geomorphology in Flood Hazard Assessment
| Content Provider | Semantic Scholar |
|---|---|
| Author | Mahnaz, Jahadi Toroghi Reza, Hosseinzadeh Seyed |
| Copyright Year | 2014 |
| Abstract | Current statistical methods may be unable to accurately predict recurrence intervals of rare, large magnitude floods. The usual procedure involves extrapolation from gauged hydrological records documenting 30–40 year records of observed (normally small) floods to the estimation of the quantifies and recurrence intervals of very large, rare floods. This Conventional approaches become less reliable as recurrence intervals exceed the length of the data base. If anything that happened in the past can happen at any instant with the same likelihood, then history provides no meaningful information and conventional method of addressing flood risk assessment can be improved by including information on past floods. Past flood information can be obtained from palaeoflood and from historical information. Documentary records can provide a catalogue of the largest flood events that curried during periods of settlement, while palaeoflood investigations using palaeostage geological indicators can document the magnitudes of the largest floods over well defined periods of time (usually from decades to millennia), and provide evidence of all other events below or above specified flow stages or thresholds. For historical flood data, human observation is required, but the modern hydrological procedures employed at gauging stations do not apply. Both sources are types of non-systematic information and use the same statistical analysis approach. palaeoflood and historical flood data provide a feasible solution for assessing and mapping flood risks, and planning flood-prone zones. These improved flood-potential estimates using palaeoflood and historical flood data also have significant beneficial economic and environmental implications, related to floodplain planning, management design of hydraulic structures, management of critical waterresources and environmental conservation issues. This paper is focused on introducing of paleoflood hydrology as an approach of modern geomorphology in flood risk assessment with emphases on using the technique in Iran. Therefore the present paper has a review substance which is based on all results throughout the world and 6 case studies in Iran. |
| Starting Page | 133 |
| Ending Page | 162 |
| Page Count | 30 |
| File Format | PDF HTM / HTML |
| Volume Number | 2 |
| Alternate Webpage(s) | https://www.sid.ir/FileServer/JE/5054420140808.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
