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Characterizing Long‐Term Hydrologic‐Response and Sediment‐Transport for the R‐5 Catchment
Author(s) -
Heppner Christopher S.,
Loague Keith
Publication year - 2008
Publication title -
journal of environmental quality
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.888
H-Index - 171
eISSN - 1537-2537
pISSN - 0047-2425
DOI - 10.2134/jeq2007.0548
Subject(s) - term (time) , environmental science , hydrology (agriculture) , drainage basin , sediment transport , sediment , geology , geography , geomorphology , geotechnical engineering , cartography , physics , quantum mechanics
Recently there have been several calls to establish long‐term data collection networks to monitor near‐surface hydrologic response and landscape evolution. The focus of this paper is a long‐term dataset from the International Hydrologic Decade (1965–1974). The small upland catchment, known as R‐5, located near Chickasha, Olahoma, has been the subject of considerable attention within the event‐based hydrologic modeling community for more than 30 yr. Here, for the first time, 8 yr of continuous near‐surface hydrologic‐response and sediment‐transport data are analyzed to show trends in the catchment's long‐term behavior. The datasets include precipitation, temperature, solar radiation, soil‐water content, infiltration, water discharge, and sediment discharge. Potential and actual evapotranspiration rates were estimated and used to calculate an average annual water balance for the catchment. Findings include, for example, that rainfall intensity rarely exceeds the threshold for Horton‐type runoff, soil‐water content is both spatially and temporally variable, and the water and sediment discharge rates are positively correlated. The R‐5 data provide a unique opportunity to test (and refine) process‐based models of continuous hydrologic response and sediment transport at the catchment scale for applications in the emerging fields of hydroecology and hydrogeomorphology.