Manual for Computing Bed Load Transport in Gravel-Bed Streams

Document Type


Journal/Book Title/Conference

Gen. Tech. Rep. RMRS-GTR-23.


Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station

Publication Date



Manual, computing bed load, bed load transport, gravel-bed streams


This manual provides background information and instructions on the use of a spreadsheet-based program for Bedload Assessment in Gravel-bed Streams (BAGS). The program implements six bed load transport equations developed specifically for gravel-bed rivers. Transport capacities are calculated on the basis of field measurements of channel geometry, reach-average slope, and bed material grain size. Calculations are carried out using Visual Basic for Applications (VBA), and the output is stored on individual spreadsheets. In addition to stepby-step instructions in software operation, the manual provides guidance in the interpretation of results.

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