River Spanning Rock Structures Field Investigations 2008

Product Type: Report

Year: 2009

Author(s): Holburn, E., K. Russell, and C. Holmquist-Johnson

Suggested Citation:
Holburn, E., K. Russell, and C. Holmquist-Johnson. 2009. River Spanning Rock Structures Field Investigations 2008. : SRH-2009-47. 96 p.

Abstract

Reclamation has initiated a multi-faceted research effort to develop design criteria for river spanning rock structures. Ongoing research consists of three primary components: 1) Field investigations of river spanning rock structure performance, 2) Physical modeling in a laboratory setting, and 3) Numerical modeling of hydraulics resulting from the presence of river spanning rock structures. From October 23, 2008 to October 29, 2008, 17 rock weirs and 3 rock ramps were visited throughout the Pacific Northwest region as part of the field investigations component. Survey data, bed material information, and qualitative habitat evaluations were collected at each structure. The data is used in a qualitative analysis, trying to capture ranges of specific design parameters and link the measured parameters to possible failure mechanisms…