Global flood hazard mapping using statistical peak flow estimates
Preprint
- 18 January 2011
- preprint
- Published by Copernicus GmbH
Abstract
Our aim is to produce a world map of flooded areas for a 100 year return period, using a method based on large rivers peak flow estimates derived from mean monthly discharge time-series. Therefore, the map is supposed to represent flooding that affects large river floodplains, but not events triggered by specific conditions like coastal or flash flooding for instance. We first generate for each basin a set of hydromorphometric, land cover and climatic variables. In case of an available discharge record station at the basin outlet, we base the hundred year peak flow estimate on the corresponding time-series. Peak flow magnitude for basin outlets without gauging stations is estimated by statistical means, performing several regressions on the basin variables. These peak flow estimates enable the computation of corresponding flooded areas using hydrologic GIS processing on digital elevation model.Keywords
This publication has 16 references indexed in Scilit:
- The PREVIEW Global Risk Data Platform: a geoportal to serve and share global data on risk to natural hazardsNatural Hazards and Earth System Sciences, 2011
- Development of highly accurate global polygonal drainage basin dataHydrological Processes, 2008
- TerraStreamPublished by Association for Computing Machinery (ACM) ,2007
- World Map of the Köppen-Geiger climate classification updatedMeteorologische Zeitschrift, 2006
- Natural Disaster HotspotsPublished by World Bank ,2005
- Statistics of extremes in hydrologyAdvances in Water Resources, 2002
- Flood frequency analysis at ungauged sites in the KwaZulu-Natal Province, South AfricaWater SA, 2001
- Flood frequency analysis of southern Africa: I. Delineation of homogeneous regionsHydrological Sciences Journal, 2000
- Parameter and quantile estimation for the generalized extreme-value distribution: a second lookEnvironmetrics, 1999
- Regional flood frequency analysis in arid and semi-arid areasJournal of Hydrology, 1992