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Test of Hack's slope to bed material relationship in the Southern Eifel Uplands, Germany
Author(s) -
Schröuder Rolf
Publication year - 1991
Publication title -
earth surface processes and landforms
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.294
H-Index - 127
eISSN - 1096-9837
pISSN - 0197-9337
DOI - 10.1002/esp.3290160806
Subject(s) - geology , bed load , hydrology (agriculture) , drainage , geomorphology , riffle , geotechnical engineering , sediment , streams , sediment transport , computer network , computer science , biology , ecology
The local reach gradient of small gravel bed rivers (drainage area 0‐8‐110 km 2 ) in the Eifel, West Germany, is adjusted to transport the river bed sediments. Transport of gravel becomes possible under high flow conditions (Shields entrainment factor ≈‐03). Mean bed material size for riffle sections increases with distance downstream. For small drainage areas channel slope is a negative exponential function of drainage area, while for the larger region the additional influence of bedload size has to be considered. Good agreement with Hack's data (1957) for Virginia and Maryland, U.S.A., is achieved (S = 0.0066 ( D 50 / A ) ‐ 40. , r = 0.67).