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MORPHOLOGY OF BEDROCK STEP POOL SYSTEMS 1
Author(s) -
Duckson Don W.,
Duckson Linda J.
Publication year - 1995
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.1752-1688.1995.tb03362.x
Subject(s) - lithology , bedrock , geology , terrain , basalt , lava , andesite , morphology (biology) , geomorphology , channel (broadcasting) , hydrology (agriculture) , volcano , mineralogy , geochemistry , volcanic rock , paleontology , ecology , geotechnical engineering , biology , engineering , electrical engineering
One‐hundred‐and‐sixty step pools were examined that have developed in andesitic, basaltic, or dacitic lavas or in glaciofluvial sediments along several reaches of Soda Creek in the Three Sisters Wilderness of the Oregon High Cascades to determine whether such systems exhibit similar morphology. Pool shapes, sizes, and spacing were measured, and the hydraulic head loss calculated for each pool surface. Lithologic variations among 15 shape categories were not significant, but size attributes ‐ length, depth, and area ‐ of pools were systematically different by rock type. The energy lost at hydraulic jumps did not differ significantly among the four lithologies, suggesting that perhaps step pools represent similar stream channel adjustments in steep terrain.