This sampler is used to measure bed-load of coarse sand and fine gravel in rivers and other water- courses.
The streamlined sampler is mounted in a frame and consists of a mouth followed by a basket of fine wire meshing (width of the mesh 300 mu).
The sharp decrease of the velocity in the wide sampling chambers causes the sediment material to settle there.
A tail fin mounted on the frame keeps the sampler in up-stream direction.
The results of the measurements are influenced by the shape of the bed (ridges, dunes, flat beds, etc.).
For a successful measurement knowledge of the relief of the bed is essential. The sampler can be discharged on board using the sample trough.
The set comprises: the sampler, the bed-load transport meter frame with stabilising tail fin and lever and the sample trough.
Bed-load transportmeter type Arnhem, standard set for sampling of particles from 300 mu till 5 mm