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The Iowa Great Lakes, often referred to as Okoboji, [1] is a group of natural lakes in northwestern Iowa in the United States. There are seven lakes in the region totaling 12,687 acres (5,134 ha) [ 2 ] with the three principal lakes of the group being Big Spirit Lake , [ 3 ] West Okoboji Lake , [ 4 ] and East Okoboji Lake .
Spirit Lake is near the upper center of the map. Big Spirit Lake is a natural body of water, approximately 5,684 acres (2,300 ha) in area, in Dickinson County in northwest Iowa in the United States. It is part of the chain of lakes known as the Iowa Great Lakes, the northern shore of the lake straddles the border with Minnesota. It is the ...
West Okoboji Lake (highlighted in purple), in the Iowa Great Lakes region. West Okoboji Lake (sometimes known as West Lake Okoboji) is a natural body of water, approximately 3,847 acres (15.57 km 2) in area, in Dickinson County in northwestern Iowa in the United States. It is part of the chain of lakes known as the Iowa Great Lakes.
Quebec, a portion of whose lands drain into the St. Lawrence Basin, is a signatory to the Great Lakes Charter of 1985, the 2001 Charter Annex, and the Agreements of 2005. [2] While not a part of the Great Lakes Basin, Quebec's position along the Saint Lawrence Seaway makes it a partner in water resource management with Ontario and the eight US ...
The newer delineation work on watersheds and subwatersheds was done using 1:24,000 scale maps and data. As a result, the subbasin boundaries were changed and adjusted in order to conform to the higher resolution watersheds within them. Changes to subbasin boundaries resulted in changes in area sizes.
The number of impaired water body segments — which can be lakes, wetlands and parts of streams — declined about 4% from the last report in 2022. But just 24% of stream segments and 30% of ...
A map of the Great Lakes Basin showing the five sub-basins. Left to right they are: Superior (magenta); Michigan (cyan); Huron (green); Erie (yellow); Ontario (red). Though the five lakes lie in separate basins, they form a single, naturally interconnected body of fresh water, within the Great Lakes Basin. As a chain of lakes and rivers, they ...
The Jordan Aquifer is the largest source of groundwater, extending from northeast Iowa to south central Iowa, and is the source of much of Iowa's agricultural and industrial water. Besides pollution, the aquifer is threatened by overuse in well-source irrigation, ethanol production, and decreased replenishment caused by extensive field tilling.
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