The Dartmouth Atlas of Global Flood Hazard: E100S0

 

Supported by the NASA Office of Earth Sciences and by Dartmouth College

 

The atlas is composed of shaded relief maps in UTM projection. Surface water detected by NASA's MODIS sensor provides a standard hydrography for comparison purposes. Most maps extend ten degrees in latitude and longitude. They illustrate actual floods imaged by a variety of orbital spacecraft in recent years. Inundation limits for each year are combined and shown as one map color.

 

Satellite data were obtained by DFO staff, processed to detect water/land boundaries, geocoded to standard UTM map projections, and analyzed to produce inundation limits in vector GIS format. Original GIS vector data (inundation limits only) are also available and can be used to study in more detail inundation during each year, or that resulting from a particular flood. Contact Brakenridge@dartmouth.edu.

 

The maps are being continually updated from archival satellite data and as new floods occur. A global atlas of flood hazard is thereby emerging and will become increasingly comprehensive. Caution to all users:  Floods in mountainous regions are high energy but difficult remote sensing targets. Also, cloud cover or other constraints sometimes restrict our ability to capture peak inundation. The maps in this atlas are incomplete and do not illustrate all areas of flood hazard.

 

Map Preparation and Image analysis: G.R. Brakenridge and Elaine Anderson

This Map:

 

 

Small (1 meg) E100S0s.jpg

 

Large (3 meg) E100S0.jpg

 

Flood Gaging Reaches for This Map: 

The reaches are used to measure flood magnitudes and compare predicted discharges. At these locations, a time series of measured water surface areas and mean flow widths have been obtained. These data are analyzed in order to constrain the size of the associated flood discharges. Reaches listed below are illustrated on this map. Click on the reach number to access the gaging reaches.

(clickable reach list to be added)

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