2017 News and Updates

May 9, 2017
GFMS flood detection / intensity maps for the Quebec region on May 1st, 5th, and 8th 2017.
GFMS flood detection / intensity maps for the Quebec region on May 1st, 5th, and 8th 2017. GFMS flood inundation map for May 8th, 2017 (top) and flood forecast for May 12th, 2017 for the Quebec region.

 

May 8, 2017
MODIS true-color image of floods in Quebec from May 8, 2017.
Its been pretty overcast over much of eastern Canada the past several days - all of Quebec, and eastern Ontario, as in the above MODIS true-color image. Clouds have shifted slightly, but not dramatically over the past few days. Central Ontario is clear, but we dont see much there - there's a spot of "flooding" north of Toronto (by Barrie), but this is simply a wetland that is not in the MOD44W layer so shows up as flood.   

 

May 5, 2017
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Like many rivers across the world, the Nzoia River in western Kenya pushes over its banks each year. For example, in November 2008, the river burst through the dikes, flooding the low-lying land around it. According to the United Nations Office for the Coordination of Humanitarian Affairs, at least 5,000 people were marooned or evacuated from the banks of the swollen river. The SERVIR Flood Map Tool, which was co-developed by the SERVIR Applied Sciences Team and the SERVIR-E&SA hub, has been used to identify sections of the dikes that needed repair. Based on this information, the World Bank’s Water Security and Resilience Project provided financial assistance to design and implement the repairs.

 

May 5, 2017
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The SERVIR Science Coordination Office recently convened a week-long Geospatial Information Technology (GIT) exchange hosted at the University of San Francisco for members of the SERVIR global network. Representatives from SERVIR-West Africa, SERVIR-Eastern & Southern Africa (E&SA), SERVIR-Himalaya, and SERVIR-Mekong made the trip to spend 13-17 March 2017 in the “City by the Bay” with USAID, NASA, and SERVIR Support Team personnel. Experts from leading technology companies in the geospatial information arena also participated during the first two days of the event. The annual exchange is primarily a venue for sharing information and knowledge among the SERVIR network on Geospatial Information Technologies, and to promote collaboration in GIT matters across the network.

 

May 5, 2017
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Satellites Reveal Shrinking Water, Bare Shorelines in Lower Grand Canyon NASA satellite imagery shows a more detailed picture of how drought has shrunk water levels and exposed the bottom of the Colorado River in the lower Grand Canyon.

 

May 5, 2017
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DEVELOP's Chesapeake Bay Agriculture project was featured by NASA's Earth Observatory. The primary goals of this project were to automate key steps in acquiring yearly satellite imagery and compute vegetation metrics to assess winter cover crop performance in the Chesapeake Bay. As a test case, four Maryland counties were used to calculate NDVI derived biomass, nitrogen content, and percent nitrogen by field from 2006-2016. In addition, software was developed to calculate the same metrics in future years. Monitoring cover crop performance in the Chesapeake Bay using Earth observations (EO) allows the MD Department of Agriculture (MDA) to confirm cover crop implementation and to inform adaptive management. 

 

May 3, 2017
MODIS image of flooding in Missouri.
Terra MODIS image of Missouri acquired on April 25th, 2017. Terra MODIS image of Missouri floods acquired on May 2nd, 2017. On May 2, 2017, the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite acquired this false-color image of flooding along several tributaries of Mississippi River. Flood water appears blue and black; forested areas are green. Fields without much vegetation are brown. For comparison, the image at the top shows these watersheds on April 25, 2017, under more typical conditions for the season. Turn on the image comparison tool to see the changes.

 

April 28, 2017
Comparison of 2016 Landsat 8 mosaic image with recent Landsat image showing burn scars.
Download Hi-Res Image (.jpg, 15MB) These images from the Landsat 8 satellite show the effects of the recent wildfires in Guatemala on the Guatemala Mayan Biosphere Reserve. The left image is a mosaic composite of Landsat images from 2016, and the right image is a Landsat 8 image from April 19, 2017. 

 

April 17, 2017
SAR flood extent map for Aukland New Zealand.
Following a Sentinel-1 acquisition over eastern North Island, covering Auckland on April 14, 2017 at 17:37h UTC, a synthetic aperture radar (SAR) flood proxy map (FPM)  was developed as a KMZ overlay (available for download here) This FPM covers an area of 175-by-500 km, derived from Sentinel-1's pre- (2016-04-02) and post-event (2017-04-14) SAR amplitude images. The colored pixels represent areas of possible floods mostly due to Cyclone Cook (Red: usually flooded vegetation, Blue: usually open water flood).  Different irrigation conditions on the two data acquisition dates can produce errors on agricultural lands and may be less reliable over urban areas. No preliminary validation was implemented, including topographic corrections. As a result, the map may show flooded areas over sloped terrain. The FPM was created by the Advanced Rapid Imaging and Analysis (ARIA) team at JPL/Caltech. The FPM Contains modified Copernicus Sentinel-1 data 2017 and there are no restrictions on its release.

 

April 17, 2017
GFMS flood detection map for 2017 Argentina floods
Overview of northern Argentina floods on April 17th 2017  Model inundation estimates at 1 km. Forecasted rainfall for the next 3 days. Resulting flood forecast overview for April 20th 2017  

 

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