| A Landscape Scale Valley Confinement Algorithm: Delineating Unconfined Valley Bottoms for Geomorphic, Aquatic, and Riparian Applications Contributor(s): United States Department of Agriculture (Author) |
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ISBN: 1511856653 ISBN-13: 9781511856652 Publisher: Createspace Independent Publishing Platform OUR PRICE: $16.14 Product Type: Paperback Published: June 2015 |
| Additional Information |
| BISAC Categories: - Reference |
| Physical Information: 0.11" H x 8.5" W x 11" (0.33 lbs) 54 pages |
| Descriptions, Reviews, Etc. |
| Publisher Description: Valley confinement is an important landscape characteristic linked to aquatic habitat, riparian diversity, and geomorphic processes. This report describes a GIS program called the Valley Confinement Algorithm (VCA), which identifies unconfined valleys in montane landscapes. The algorithm uses nationally available digital elevation models (DEMs) at 10-30 m resolu-tion to generate results at subbasin scales (8 digit hydrologic unit). User-defined parameters allow results to be tailored to specific applications and landscapes. Field data were sampled to verify geomorphic characteristics of valley types identified by the program, and a detailed accuracy assessment was conducted to quantify the reliability of the algorithm output. |