Step Pool Geometry and Flow Characteristics in Low-Sediment-Storage Channel Beds

by Tamir Grodek, Hebrew Univ, Jerusalem, Israel,
Moshe Inbar, Hebrew Univ, Jerusalem, Israel,
Asher P. Schick, Hebrew Univ, Jerusalem, Israel,

Document Type: Proceeding Paper

Part of: Hydraulic Engineering


Data from two small ephemeral streams in Israel indicate that step pool geometry in bedrock channels is similar, in its salient features, to that in alluvial channels. For steep (>0.10) bedrock channels the average step length is quasi-constant. Well developed steps found in very small, lithologically homogeneous channels suggest that low magnitude high frequency events play a role in their formation. In Nahal Meshushim (drainage area 14 km2) the water surface reconstructed from the highest flood marks indicates that all steps, though partly submerged, retain clear discontinuities between moderately sloping segments.

Subject Headings: River and stream beds | Alluvial channels | Channels (waterway) | Channel flow | Geometrics | Bedrock | Water surface | Israel | Middle East | Asia

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