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Watershed delineation is the process of identifying the boundary of a watershed, also referred to as a catchment, drainage basin, or river basin. It is an important step in many areas of environmental science, engineering, and management, for example to study flooding, aquatic habitat, or water pollution.
The pieces include units that drain to segments of streams, remnant areas, noncontributing areas, and coastal or frontal units that can include multiple watersheds draining to an ocean or large lake. Hence, half or more of the hydrologic units are not watersheds as the name of the framework Watershed Boundary Dataset (WBD) implies.
The following is a list of rivers and creeks in Iowa. The rivers are listed by multiple arrangements: those that form part of the boundaries of the U.S. state of Iowa ;
Following is a list of dams and reservoirs in Iowa. 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 ).
A hierarchical watershed transformation converts the result into a graph display (i.e. the neighbor relationships of the segmented regions are determined) and applies further watershed transformations recursively. See [18] for more details. A theory linking watershed to hierarchical segmentations has been developed in [19]
The Raccoon River is a 30.8-mile-long (49.6 km) [4] tributary of the Des Moines River in central Iowa in the United States. As measured using the longest of its three forks, its length increases to 226 miles (364 km). [4] Via the Des Moines River, it is part of the watershed of the Mississippi River.
Catfish Creek is a 21.2-mile-long (34.1 km) [1] tributary of the upper Mississippi River in Dubuque County, Iowa. The governments within the watershed have a say in the managing body of the creek, the Catfish Creek Watershed Management Authority. The authority's goal is to promote education on managing the system and fixing issues like the ...
The Shell Rock River flows from Albert Lea Lake in Freeborn County, Minnesota, [5] and soon enters Iowa, flowing generally south-southeastwardly through eastern Worth, northeastern Cerro Gordo, western Floyd, northeastern Butler, southwestern Bremer and northwestern Black Hawk counties, past the town of Glenville in Minnesota and the towns of Northwood, Plymouth, Rock Falls, Nora Springs ...