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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.
A drainage basin's boundaries are determined by watershed delineation, a common task in environmental engineering and science. In a closed drainage basin, or endorheic basin , rather than flowing to the ocean, water converges toward the interior of the basin, known as a sink , which may be a permanent lake, a dry lake , or a point where surface ...
This map of United States water resource subregion hydrologic units updated boundaries to include the ocean as well as the portions of the basins that cross international borders For the use of hydrologists, ecologists, and water-resource managers in the study of surface water flows in the United States, the United States Geological Survey ...
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.
The Ned Ashton House in Iowa City, Iowa, also known as the Edward L. Ashton House or as Ashton House, was built in 1947-1948 and listed on the National Register of Historic Places in 2001. [1] The house was built in 1947 by Edward L. "Ned" Ashton as a private residence. [2]
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 ).
Saylorville Lake is a reservoir on the Des Moines River in Iowa, United States.It is located 11 miles (18 km) upstream from the city of Des Moines, and 214 miles (344 km) from the mouth of the Des Moines River at the Mississippi River.
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