Flood Plain Analysis and Mapping – The Geospatial Tools that Keep Us High and Dry

The ongoing flooding in North Dakota has presented a monumental challenge to all parties affected by the natural disaster. From residents living in the affected areas to the state and local government agencies in charge of coordinating sandbagging efforts and other preventative measures. Not to mention the relief and recovery efforts that will likely continue long after the water has receded. However technological developments are making it easier for public works departments and emergency services to better anticipate and plan for, and hopefully prevent such devastating consequences as we are seeing in North Dakota. Figure 1: This half-meter resolution image was taken June 25, 2011 by the GeoEye-1 satellite and shows the flooded Souris River and surrounding neighborhoods in Minot, North Dakota Precision Planning is Critical The United States is richly populated with large lakes and some of longest and largest rivers in the world, which leaves parts of the country particularly susceptible to flooding.  In the event of rising waters, authorities should always be prepared to act swiftly. One tool that can ensure accurate and efficient planning of water management in adverse weather is flood plain analysis and mapping. In worsening conditions those metrics will make preparation of barricades, evacuations and road closures, as effective and precise as possible. The technology ensures that the extent of flooding can be accurately estimated based on a computer model of the underlying terrain, taking geographic features such as floodplains, valleys and other easily floodable land formations into account. Figure 2: This one-meter resolution image was taken by the IKONOS satellite on May 30, 2009 and shows the Souris River in Minot, North Dakota Looking at an example of the European Space Agency implementing floodplain analysis in regions of France, the program Chief of Staff Colonel Francois Maurer speaks plainly on the benefits of their system, “…our key issue is time – but very quickly the satellite maps give us an impression of the flood extent, and the areas that are affected. The maps can support high-level decision making and the best use possible of human and material resources.” Figure 3: Images Courtesy of GeoEye What has worked in France as in the example above can certainly be implemented in the threatened regions of the United States. GeoEye offers a total imagery solution for creating the digital terrain model necessary for the floodplain simulation with its GeoStereo capability, which supports a wide range of applications such as DEM (digital elevation model) creation, building height extraction, spatial layers, which allows for three-dimensional modeling of terrain. Related Articles Google Maps and Local Photographer Team to Visualize the Destruction in Joplin, MO. GeoEye Ups the Ante with its Geospatial Imagery of Earthquake-stricken Japan How Google is Mapping 25 Years of Climate Change