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Products  |  Fluid Mechanics  |  Hydraulics for Civil Engineering  |  HM 168
HM 168 Sediment Transport in River Courses Show data sheet (pdf file) Print page
Technical Description

  HM 168 demonstrates important phenomena of bed-load transport in the area near the bottom at subcritical discharge. The large dimensions of the experimental section enable the modelling of river courses with and without structure.
  The core element of the HM 168 experimental flume is the stainless steel experimental section. A sediment layer up to 10cm high covering an area of 5x0,8m allows bed-load transport to be studied. The sediment is held in the experimental section by plate weirs at the inlet and at the outlet. The tank after the water drain contains a sediment trap with filter elements for medium and coarse sand. The water circuit is closed.
  In addition to bed-load transport in open channels without structures, some models can also be used to observe fluvial obstacle marks, namely scour formation and siltation at structures. A bridge pier, a plate weir or an island can be inserted into the experimental section. You can also design your own models using deflection plates and angular steel.
  Profile measurement in the sediment along the bottom and the determination of the discharge depth at each point on the experimental section is done via a movable instrument carrier and a point gauge. The discharge is measured via an electromagnetic flow meter.
  The well-structured instructional material sets out the fundamentals and provides a step-by-step guide through the experiments.

Learning Objectives / Experiments
- bed-load transport in open channels
- how flow velocity affects bed-load transport
- how grain size affects bed-load transport
  * medium sand (0,2...0,63mm)
  * coarse sand (0,63...2mm)
- ripple formation on the river bed
- observing the formation of meanders
- fluvial obstacle marks on structures
  * bridge pier with rectangular profile
  * rounded-nosed bridge pier
  * pointed-nosed bridge pier
  * island (round or rectangular)
- bed-load transport formulae
  * Meyer-Peter and Müller formula
  * Einstein's formula
  * determining the transport rate

* Open-channel bed-load transport1
* Observing the formation of meanders1
* Observing fluvial obstacle marks on structures1
* Movable point gauge for profile measurement in

  the sediment

Alternative products
HM 140 -- Open-Channel Sediment Transport
HM 165 -- Studies in Hydrology
Fundamentals of Sediment Transport
[1] open-channel bed-load transport
[2] two different discharge levels can be set: small discharge for experiments on meanders, large discharge for experiments with structures
[3] experimental flume with experimental section, inlet element, outlet element, closed water circuit, 1 set of models
[4] closed water circuit with water tank with sediment trap, pump, controlled flow adjustment and electromagnetic flow meter
[5] experimental section with grooves for plate weirs to realise different flow conditions
[6] measurement of profiles along the bottom with moveable instrument carrier and point gauge
[7] inlet element with plate weir to protect against sediment flowing back
[8] models supplied 3 bridge piers, 2 islands, set of deflection plates (for your own model ideas)
[9] sediment trap with 2 different filter element for medium sand and coarse sand
[10] experimental section, inlet and outlet element made of stainless steel
Technical Data

Experimental flume
- stainless steel
- dimensions of the experimental section:

- power consumption: 2,9kW
- max. head: 13m
- max. flow rate: 80m³/h
Storage tank, content: approx. 1.000L
Sediment trap filter elements
- medium sand: 156mesh 
- coarse sand: 49mesh
Flow meter
- measuring range I: 2m³/h
- measuring range II: 70m³/h


Dimensions and Weight

LxWxH: 6.220x900x1.200mm
Empty weight: approx. 800kg

Required for Operation

230V, 50Hz, 1 phase

Sediment: medium sand or coarse sand (0,2...2mm)

Scope of Delivery
1 experimental flume, 2 filter elements for sediment trap, 3 bridge piers, 2 islands, 8 deflection plates, 12 T-pieces + 6x angle profile
1 set of instructional material
Order Details

070.16800  HM 168  Sediment Transport in River


© 2005 G.U.N.T. Gerätebau GmbH