Search results
Results From The WOW.Com Content Network
The Mississippi River drains about 41% of the nation's water systems into the Gulf of Mexico. The river itself begins at Lake Itasca in Minnesota and runs through 10 states before it reaches the Gulf.
In late summer 1988 the dead zone disappeared as the great drought caused the flow of Mississippi to fall to its lowest level since 1933. During times of heavy flooding in the Mississippi River Basin, as in 1993, "the "dead zone" dramatically increased in size, approximately 5,000 km (3,107 mi) larger than the previous year". [72]
The exaerobic zone is found at the boundary of anoxic and hypoxic zones. Hypoxia can occur throughout the water column and also at high altitudes as well as near sediments on the bottom. It usually extends throughout 20–50% of the water column, but depends on the water depth and location of pycnoclines (rapid changes in water density with depth).
Map of regions covered by the 122 Weather Forecast Offices. The National Weather Service operates 122 weather forecast offices. [1] [2] Each weather forecast office (WFO or NWSFO) has a geographic area of responsibility, also known as a county warning area, for issuing local public, marine, aviation, fire, and hydrology forecasts.
Water levels on the Mississippi River are nearing historic lows for the second consecutive year, triggering a drinking water emergency in Louisiana as ocean water flows upstream, unimpeded by the ...
The Mississippi River fell to an all-time low on Monday at the Memphis, Tennessee, river gauge, eclipsing the previous low water record set nearly a year ago, according to National Weather Service ...
An example of this is the dead zone located off the coast of the Mississippi River. According to NOAA , the 2016 predicted size of this dead zone is going to be approximately 5,898 square miles with a nitrate concentration of 146,000 metric tons of nitrate flowing down the Mississippi and Atchafalaya River into the Gulf of Mexico. [ 5 ]
Madeline Heim is a Report for America corps reporter who writes about environmental issues in the Mississippi River watershed and across Wisconsin. Contact her at (920) 996-7266 or mheim@gannett.com .