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SUSPENDED SEDIMENT AND TURBIDITY FOLLOWING ROAD CONSTRUCTION AND LOGGING IN WESTERN MONTANA 1
Author(s) -
Anderson Bruce,
Potts Donald F.
Publication year - 1987
Publication title -
jawra journal of the american water resources association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.957
H-Index - 105
eISSN - 1752-1688
pISSN - 1093-474X
DOI - 10.1111/j.1752-1688.1987.tb00842.x
Subject(s) - sediment , hydrograph , hydrology (agriculture) , turbidity , snowmelt , logging , environmental science , turbidite , drainage basin , bed load , suspended load , stream power , sediment transport , geology , snow , geomorphology , geotechnical engineering , oceanography , forestry , geography , cartography
Forest management activities in a second order drainage basin increased suspended sediment yields 7.7 fold in the first year following road construction, and two‐fold following logging in the second year. Sediment supply limitations resulted in poor correlations between sediment concentrations with discharge. Sediment transport was strongly hysteretic, with the highest sediment concentrations occurring on the rising limbs of snowmelt hydrographs and individual peaks. In addition to discharge, hydrograph characteristics such as limb, dQ/dt, and the product of dQ/dt and limb aided in explaining variability of observed sediment concentrations. Sediment‐turbidity relationships were strongly discharge dependent, reflecting the changing composition of the suspended load with stream power and sediment supplies.