Headwater stream length dynamics across four physiographic provinces of theAppalachianHighlands

• DOI: 10.1002/hyp.11259
• Publication Date: 2017-06-22T18:02:36Z
• Authors: Carrie K. Jensen; Kevin J. McGuire; Philip S. Prince
• Keywords: Physiographic province; Bedrock; Biogeochemistry

Abstract Understanding patterns of expansion, contraction, and disconnection headwater stream length in diverse settings is invaluable for the effective management water resources as well informing research hydrology, ecology, biogeochemistry temporary streams. More accurate mapping network quantitative measures flow duration vast regions facilitate implementation quality regulation other policies to protect waterways. We determined connectivity wet geomorphic channel 3 forested catchments (<75 ha) each 4 physiographic provinces Appalachian Highlands: New England, Plateau, Valley Ridge, Blue Ridge. mapped 7 times at catchment characterize conditions between exceedance probabilities <5% >90% mean daily discharge. Stream dynamics reflected geologic controls both regional local scales. Wet was most variable two Ridge on a shale scarp slope changed least The density source area origins differed crystalline sedimentary provinces, Plateau had fewer with much larger contributing areas than England However, surface depended lithology, structure, distribution surficial deposits such boulders, glacially derived material, colluival debris or sediment valley fills. Several proxies indicate magnitude dynamics, including bankfull width, connectivity, base index, ratio length. Consideration characteristics multiple spatial scales imperative future investigations intermittency headwaters.