A field calibration of the sediment-trapping characteristics of the Helley-Smith bed-load sampler

Abstract

Introduction__________________________________________ 1 Bedload________________________________________________ 1 Helley-Smith bedload sampler _____________________________ 2 Description of field-test facility __________________________________ 3 East Fork River __________________________________________ 3 Conveyor-belt bedload trap _____________________________________ 4 Sampling techniques with Helley-Smith bedload sampler_______________________ 8 Results of field-calibration tests ________________________________ 9 Bedload-transport rates by individual particle-size categories, basic data ________ 10 Comparison of Helley-Smith results to conveyor-belt results, basic data _________ 14 Modifications to the basic data ____________________________ 19 Summary and recommendations