AffiliationUniv Arizona, Sch Nat Resources & Environm
Keywordssurface water hydrology
MetadataShow full item record
CitationGoodrich, D.C., W.G. Kepner, L.R. Levick, and P.J. Wigington, Jr., 2018. Southwestern Intermittent and Ephemeral Stream Connectivity. Journal of the American Water Resources Association (JAWRA) 54(2): 400–422. https://doi.org/10.1111/1752-1688.12636
Rights© 2018 American Water Resources Association. This article is a U.S. Government work and is in the public domain in the USA
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AbstractEphemeral and intermittent streams are abundant in the arid and semiarid landscapes of the Western and Southwestern United States (U.S.). Connectivity of ephemeral and intermittent streams to the relatively few perennial reaches through runoff is a major driver of the ecohydrology of the region. These streams supply water, sediment, nutrients, and biota to downstream reaches and rivers. In addition, they provide runoff to recharge alluvial and regional groundwater aquifers that support baseflow in perennial mainstem stream reaches over extended periods when little or no precipitation occurs. Episodic runoff, as well as groundwater inflow to surface water in streams support limited naturally occurring riparian communities. This paper provides an overview and comprehensive examination of factors affecting the hydrologic, chemical, and ecological connectivity of ephemeral and intermittent streams on perennial or intermittent rivers in the arid and semiarid Southwestern U.S. Connectivity as influenced and moderated through the physical landscape, climate, and human impacts to downstream waters or rivers is presented first at the broader Southwestern scale, and secondly drawing on a specific and more detailed example of the San Pedro Basin due to its history of extensive observations and research in the basin. A wide array of evidence clearly illustrates hydrologic, chemical, and ecological connectivity of ephemeral and intermittent streams throughout stream networks.
NoteThis article is a U.S. Government work and is in the public domain in the USA.
VersionFinal published version
SponsorsEPA ORD; USDA-ARS Southwest Watershed Research Center