Abstract
It has long been recognized that conditions at a point on a stream are highly dependent on conditions upgradient within the topographic watershed. The hydrologic unit (HU) system has provided a useful set of nationally consistent, hydrologically based polygons that has allowed for the generalization and tabulation of various conditions within the stream and its valley.
Parent Publication
Citation
Glover, James; Omernik, James; Hughes, Robert; Griffith, Glenn; Weber, Marc. 2016. Watersheds, ecoregions and hydrologic units: the appropriate use of each for research and environmental management decisions. In: Stringer, Christina E.; Krauss, Ken W.; Latimer, James S., eds. 2016. Headwaters to estuaries: advances in watershed science and management -Proceedings of the Fifth Interagency Conference on Research in the Watersheds. March 2-5, 2015, North Charleston, South Carolina. e-General Technical Report SRS-211. Asheville, NC: U.S. Department of Agriculture Forest Service, Southern Research Station. 1 p.