3.5 Sediment Budget

A sediment budget is a useful approach to integrating each of the previously discussed areas of potential hydrogeomorphic effects (hydrology, sediment supply, sediment transport, and sediment storage) into a sediment mass balance perspective that provides a framework for interpreting changes in fluvial geomorphology caused by hydroelectric projects and other land uses. Sediment budgets may be constructed at various scales and to varying levels of detail; ranging from those that incorporate detailed long-term field measurements of sediment supply, transport, and storage processes in a channel reach; to rapid sediment budgets that describe geomorphic processes and rates throughout a drainage basin using the best available information. The methods used to develop a sediment budget depend on the specific goals and objectives of the study, and most of approaches described in previous sections are directly applicable.

The following references are recommended for additional information on sediment budget approaches:

O'Connor, J. E., G. E. Grant, and T. Haluska. 2003. Overview of geology, hydrology, geomorphology, and sediment budget for the Deschutes River basin, Oregon. Pages 7-30 in J. E.

O'Connor and G. E. Grant, editors. A peculiar river: geology, geomorphology, and hydrology of the Deschutes River, Oregon. Water Science and Application Series No. 7. American Geophysical Union, Washington, D. C.

Reid, L. M., and T. Dunne. 1996. Rapid evaluation of sediment budgets. Catena Verlag, GMBH, Reiskirchen, Germany.

Reid, L. M., and T. Dunne. 2003. Sediment budget as an organized framework in fluvial geomorphology. G. M. Kondolf and H. Piegay, editors. Tools in fluvial geomorphology. John Wiley and Sons, Ltd, England.

Stillwater Sciences. 2000. Sediment budget for the North Umpqua River basin. Appendix 2-1 in the North Umpqua cooperative watershed analysis synthesis report. Prepared by Stillwater Sciences, Berkeley, California for PacifiCorp, Portland, Oregon.

Stillwater Sciences. 2006. Sediment budget for the Carmen-Smith Hydroelectric Project area, upper McKenzie River basin, Oregon. Final report. Prepared by Stillwater Sciences, Arcata, California for Eugene Water & Electric Board, Eugene, Oregon.