Water in the Morganza Floodway
acquired May 18, 2011 download large image (9 MB, JPEG, 5200x6000)
Water in the Morganza Floodway
acquired May 4, 2011 download large image (11 MB, JPEG, 5200x6000)

On May 18, 2011, the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite observed water in the Morganza Floodway of Louisiana. As the U.S. Army Corps of Engineers notes, the floodway is designed to ease water levels in downstream communities along the Mississippi by diverting some water into the Atchafalaya Basin.

MODIS acquired the top image on May 18, 2011, and the bottom image on May 4, 2011. Both images use a combination of visible and infrared light to increase contrast between water and land. Water ranges in color from gray-blue to navy. (Lake Pontchartrain appears silvery blue on May 18 due largely to the angle of sunlight.) Vegetation is green. Bare ground is brown. Clouds are pale blue-green and cast shadows.

Both images show flooded conditions along the Mississippi River. A significant difference between the images, however, is the water visible in the Morganza Floodway on May 18. The Army Corps of Engineers reported that the discharge in the floodway was 114,000 cubic feet per second on May 18, the floodway’s fifth day of operation in 2011.

The Advanced Hydrological Prediction Service (AHPS) of the U.S. National Weather Service reported that the Mississippi River at Baton Rouge reached 44.85 feet (13.67 meters) at 2:00 p.m. local time on May 18. This level was below the city’s record flood level of 47.28 feet (14.41 meters) set in 1927. As of May 18, the Mississippi River was projected to remain at roughly the same level at Baton Rouge through May 23.

  1. References

  2. National Weather Service. Advanced Hydrologic Prediction Service. Accessed May 18, 2011.
  3. U.S. Army Corps of Engineers (n.d.) Morganza Floodway. Accessed May 18, 2011.

NASA images courtesy MODIS Rapid Response Team, Goddard Space Flight Center. Caption by Michon Scott.

Instrument(s): 
Terra - MODIS

Water in the Morganza Floodway

Share
Image Location
Image Location
More in this Event (view all)
Left
Early Spring Floods in Indiana High Waters along the Ohio and Mississippi Rivers Rising Waters on the Mississippi River Rising Waters on the Minnesota and Mississippi Rivers Rising Waters on the James River Retreating Snow and Advancing Water in the Upper Midwest Receding Snow Sets Stage for Floods near Fargo Spring Flooding in the Upper Midwest Rising Rivers in the U.S. Midwest Rising Waters along the Red River Spring Floods in Saskatchewan Spring Flooding in Manitoba Heavy Rain in Central United States Flooding along the Mississippi River Continued Flooding along the Mississippi Flooding along the James River, South Dakota Flooding in Wake of Levee Breach Spring Floods in the U.S. Midwest and Canada Flooding along the Wabash and Ohio Rivers Flooding at the Junction of the Mississippi and Ohio Rivers Floods Spread South along the Mississippi River High Waters along the Mississippi River Floods Continue along the Mississippi River Flooding Continues along the Red River Flooding in Memphis Flooding in Arkansas Flooding reaches Vicksburg, Mississippi Morganza Floodway, 1973 Floodwaters near Natchez Rising Waters on the Lower Mississippi Morganza Spillway Opens in Louisiana Mississippi Floods in Arkansas and Tennessee Mississippi Floods in Missouri and Tennessee Flooding near New Madrid, Missouri Water in the Morganza Floodway Morganza Floodway after Five Days of Flow Mississippi Floods near Vicksburg Sediment Plume in Lake Pontchartrain Lingering Floods along the Mississippi River Lower Mississippi River Remains Swollen Waters Spread Across Floodway above Morgan City Lay of the Land Between Old River and the Mississippi Floodwaters Recede along Wabash and Ohio Rivers Floodwaters Retreat from Birds Point-New Madrid Floodway Lingering Floods in Louisiana Morganza Floodway Lingering Floodwaters near Vicksburg, Mississippi Sediment from the Mississippi Floods Sediment in the Gulf of Mexico Floods Recede around the Wabash-Ohio Confluence
Right