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The Arkansas Valley is a Level III ecoregion designated by the Environmental Protection Agency (EPA) in the U.S. states of Arkansas and Oklahoma.It parallels the Arkansas River between the flat plains of western Oklahoma and the Arkansas Delta, dividing the Ozarks and the Ouachita Mountains with the broad valleys created by the river's floodplain, occasionally interrupted by low hills ...
Location of monitoring station Notes cu ft/s ... Source for all rivers except St. Francis is the "USGS Water-Data Report ... USGS Hydrologic Unit Map – State of ...
The Cossatot is known as a difficult (class II - IV+) whitewater stream to canoeists and kayakers and a section at Cossatot Falls in Howard County, Arkansas has been called "the most challenging section of whitewater between the Smokies and the Rockies," though there are many more challenging runs in the state of Arkansas, such as Richland ...
The level III ecoregions in Arkansas are the South Central Plains (35), Ouachita Mountains (36), Arkansas Valley (37), Boston Mountains (38), Ozark Highlands (39), Mississippi Alluvial Plain (73), Mississippi Valley Loess Plains (74). (Compare to map of Level IV ecoregions.) This list of ecoregions in Arkansas provides an overview of ecoregions ...
Arkansas Valley may refer to: the floodplain and associated areas along the Arkansas River in Colorado, Kansas, Oklahoma, and Arkansas; Arkansas River Valley region ...
The Arkansas River Valley, also known as the Arkansas Valley, is a region in Arkansas defined by the Arkansas River in the western part of the state. Generally defined as the area between the Ozark and Ouachita Mountains, [1] the River Valley is characterized by flat lowlands covered in fertile farmland and lakes periodically interrupted by high peaks.
The Oklahoma Water Resources Board reported in 2015, that phosphorus levels had been declining in the Illinois River and its tributaries on the Oklahoma side of the state line. On October 1, 2015, the U.S. Environmental Protection Agency (USEPA) issued for public comment the water quality model for the Illinois River. [10]
The following is a list of dams and reservoirs in Arkansas. All major dams are linked below. The National Inventory of Dams defines any "major dam" as being 50 feet (15 m) tall with a storage capacity of at least 5,000 acre-feet (6,200,000 m 3 ), or of any height with a storage capacity of 25,000 acre-feet (31,000,000 m 3 ).