Active Archive of Large Floods, 1985-Present

Master Index of Inundation Maps

Global Surface Water Record

River Watch

Other Flood Detection Tools

Sample Images and Maps






World Atlas of Large Flood Events 1985-2002

The displays presented below are based on data derived from a wide variety of news, governmental, instrumental, and remote sensing source. They were produced by Dr. Sebastien Caquard. For additional information concerning how these maps and tables are created, please review the Archive Notes.


Contents of the Atlas

Part I - Evolution of the floods since 1985

Flood Number

Interannual evolution

Map of the floods number


Flood Duration

Interannual evolution

Seasonal evolution

Map of the flood duration


Flood Seasonality

Interannual and Seasonal evolution

Map of the flood seasonality


Flood Causes

The different causes

Interannual evolution

Map of the flood causes


Recurrence interval

Map of recurrence interval anecdotal


Severity class




Part II - Consequences of these floods


Interannual average evolution or Sum/Max

Seasonal evolution total or Average/Median

Map of the flood fatalities



Interannual average evolution or Sum/Max

Map of the people displaced



Interannual average evolution or Sum/Max.

Map of economical cost









This work is made possible by data acquired by NASA, the Japanese Space Agency, and the European Space Agency, and funding support from NASA and the European Commission, through the Global Disaster Alert and Coordination System (GDACS) project, Joint Research Centre, Ispra, Italy. The Observatory was founded in 1993 at Dartmouth College, Hanover, NH USA and moved to the University of Colorado, INSTAAR, CSDMS in 2010. The institutional support of both universities is gratefully acknowledged.

http://floodobservatory.colorado.edu/Flood Observatory