Bed-load transportmeter for find sand "Sphinx"

Bed-load transportmeter for find sand "Sphinx"

Vinckers, J.B.
Bijker, E.W.
Schijf, J.B.

Civil Engineering and Geosciences

Hydraulic Engineering

1953-09-04

A new bed-load transportmeter has been designed particularly for very fine bed material (below 400 micron). The basic conception is the same as for the so-called Delft-bottle used for measuring transport by turbulent suspension. The instrument is of the flow-through type. The flow enters through a narrow and relatively high nozzle and is conducted, first by a rectangular tube with the same cross section as the nozzle, then by a wider circular tube curved spiralwise into settling chambers. The flow leaves the instrument by a wide slit high at the rear end. The disposition of the tubes and settling chambers has been developed during tests in the Hydraulic Laboratory at Delft. Field tests regarding the method of suspension and of handling still have to be carried out. The laboratory investigation has resulted in a hydraulic efficiency (ratio between flow through tube apparatus, and product of nozzle area and flow velocity outside) between 0.9 and 1.1, depending on the working conditions. With very fine sand, a small amount (up to 15 per cent) may be flushed through the exit tube and get lost for the measurement.

sand transport
sediment tranport
transport measurement
bed load transport

http://resolver.tudelft.nl/uuid:90294868-308a-4768-88d9-01e0ba8d0246

IAHR

Proceedings Minnesota International Hydraulic Convention

Institutional Repository

conference paper

(c) 1953 Vinckers, J.B.; Bijker, E.W.; Schijf, J.B.