New approach to calibrating bed load samplers
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Abstract
Cyclic variations in bed load discharge at a point, which are an inherent part of the process of bed load movement, complicate calibration of bed load samplers and preclude the use of average rates to define sampling efficiencies. Calibration curves, rather than efficiencies, are derived by two independent methods using data collected with prototype versions of the Helley‐Smith sampler in a large calibration facility capable of continuously measuring transport rates across a 9 ft (2.7 m) width. Results from both methods agree. Composite calibration curves, based on matching probability distribution functions of samples and measured rates from different hydraulic conditions (runs), are obtained for six different versions of the sampler. Sampled rates corrected by the calibration curves agree with measured rates for individual runs.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | New approach to calibrating bed load samplers |
| Series title | Journal of Hydraulic Engineering |
| DOI | 10.1061/(ASCE)0733-9429(1985)111:4(677) |
| Volume | 111 |
| Issue | 4 |
| Year Published | 1985 |
| Language | English |
| Publisher | American Society of Civil Engineers |
| Publisher location | New York, NY |
| Contributing office(s) | Minnesota Water Science Center |
| Description | 18 p. |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Journal of Hydraulic Engineering |
| First page | 677 |
| Last page | 694 |
| Online Only (Y/N) | N |
| Additional Online Files (Y/N) | N |
| Google Analytic Metrics | Metrics page |