Early View article: “Oregon Hydrologic Landscapes: A Classification Framework,” by Parker J. Wigington Jr., Scott G. Leibowitz, Randy L. Comeleo, and Joseph L. Ebersole.
The authors developed a hydrologic landscape (HL) classification approach that describes factors of climate-watershed systems that control the hydrologic characteristics of watersheds. Their assessment units are incremental watersheds (i.e., headwater watersheds or areas draining directly into stream reaches). Major components of the classification include indices of annual climate, climate seasonality, aquifer permeability, terrain, and soil permeability.
The objective of their Oregon HL approach is to classify the intrinsic climate-watershed attributes of assessment units across the entire state in a manner that provides a basic description of the macro hydrologic characteristics of the units. In this article, they present the development of the Oregon HL classification system and evaluate the ability of HLs to explain variability in hydrologic behavior of a series of gauged river basins. The Oregon HL approach has potential to be a useful framework for comparing hydrologic attributes of streams and rivers in the Pacific Northwest.