Active Archive of Large Floods, 1985-Present

Master Index of Inundation Maps

The Surface Water Record

River Watch

Other Flood Detection Tools

Sample Images and Maps






Space-based Measurement, Mapping, and Modeling of Surface Water

For Research, Humanitarian, and Water Management Applications

Flood Observatory Director

Observatory Mission Statement

Community Surface Dynamics Modeling System
University of Colorado, Campus Box 450, Boulder, CO 80309 USA

Visit the Global Flood Partnership

Testing mobile-friendly "Predicted Flooded Areas" map


Rivers in southern India flooding after passage of tropical deep depression (BOB 03)

Example: Site 2041, below.

Flooding in Philippines from Typhoon Lando/Koppu, Mapping in progress, see Current Conditions Map Sheet.

October 22, 2015

Below left: MODIS image of Angat River mouth, NW of Manilla, Sept. 23, 2015. Below right, MODIS image from Oct. 21, 2015


River Watch sites are also tracking current drought conditions: example Site 277, below, Zambezi River, Zambia



Click on Map Sheets Below for Access to Near Real Time Flood Mapping

Whole Earth image from JHT's Planetary Pixel Emporium

There are two map series accessible from the above global index: "Current Flood Conditions", providing daily, satellite-based updates of surface water extent, and the "Global Atlas of Floodplains", a remote sensing record of floods, 1993 to 2015. Links to GIS data supporting the displays are also provided. This >20 year long effort has been sustained by grants and contracts from NASA, the European Commission, the World Bank, the Latin American Development Bank and others to Dartmouth College and to the University of Colorado.


Current 7-day Accumulated Rainfall

from NASA Goddard Space Flight Center Satellite Precipitation


SSMI/SSMIS/AMSR2-derived Total Precipitable Water - Global


Current NASA Worldview MODIS Display



River Watch 2: Experimental Satellite-based River Discharge Measurements

Daily updates complete at 14:30 MDT


NASA MODIS tracks intense monsoon flooding in Myanmar

(DFO event #4283, example below is Ayeyarwady Delta, Aug. 8, 2015, sediment-rich flood water is brown)





Survey of DFO Projects and Products

Global 7-Day Runoff Maps


Below: Draft Current Conditions and Flood Hazard Map, Guapore River

Plot of total number of large and extreme floods listed in the DFO Flood Archive


The Flood Observatory facilitates practical use of space-based information for international flood detection, flood response, future risk assessment, and hydrological research. In 2013-2017, it is leading a NASA SMD/ESD Applied Sciences Program project to improve World Food Programme use of flood mapping information. Click on video below for visualization of WFP logistics. Also see this video for information about the role of the International Charter for Space and Major Disasters in making satellite data available for disaster response.



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Creative Commons License
This web site and associated data by G. Robert Brakenridge and Albert J. Kettner are licensed under a Creative Commons Attribution 3.0 Unported License.



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