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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

Abstract:

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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