Original scientific paper
METEOROLOGICAL AND HYDROLOGICAL MODELING OF AN EXTREME PRECIPITATION EVENT IN S–ICELAND
Gunnar G. Tómasson
; VST Consulting Engineers Ltd. Ármúli 4, IS-108 Reykjavík, Iceland
Haraldur Ólafsson
; University of Iceland, Iceland, Institute for Meteorological Research, Iceland, Icelandic Meteorological Office, Iceland
Ólafur Rögnvaldsson
; Institute for Meteorological Research, Iceland, Icelandic Meteorological Office, Iceland, University of Bergen, Norway
Abstract
The atmospheric conditions and surface runoff during an event of extreme precipitation have been simulated using
numerical weather and hydrological runoff models. The results are compared to the available observations, indicating that the
simulations are quite successful in reproducing the event. In the atmospheric simulations, there are very large orographic gradients
in precipitation, but no direct observations to verify these gradients. The increase in runoff provides however an indirect validation
and the quality of the results are such that numerically simulated precipitation will be used in future hydrological studies in the
region.
These studies are of great importance to improve flood prediction for the area and for the creation of design floods for various hydropower plants, reservoirs and diversion structures within the river basin.
Keywords
Numerical simulations; hydrology; precipitation; flood prediction; Iceland; HEC-HMS; MM5
Hrčak ID:
64700
URI
Publication date:
15.12.2005.
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