Faciliteit

Kraijenhoff van de Leur Laboratorium voor Water- en Sedimentdynamica

Het experimentele onderzoek van het Laboratorium voor Water- en Sedimentdynamica richt zich voornamelijk op morfologische reacties op kanaal- en landstromingen. Ons huidige onderzoek gaat over beekherstel, geulerosie en plastic verplaatsing.

Faciliteiten

Straight flume

The straight flume has an effective length of 13.6 m and an internal width of 2.6 m. The flume features a sediment catch, which can be connected to the sediment pump for recirculation of sediment. To scan the bed surface in the flume, a computer-controlled laser scanner system can cover the effective area of the flume at a resolution of 1 mm2.

Technical specifications
Total length	18.0 m.
Test reach length	12.8 m.
Width	2.6 m.
Depth	0.7 m.
Inclination	0 -
Maximum discharge	190 l/s
Discharge sediment pump	4 l/s
Resolution bed scanner	1 mm2

Tilting flume

The tilting flume is a 1.2 m wide tilting flume, with an effective length of 14.4 m. The flume has sediment catch at the downstream end, and a sediment pump for recirculation of bed material.

Technical specification
Total length	17.1 m.
Test reach length	14.4 m.
Width	1.2 m.
Depth	0.5 m.
Maximum inclination	4 %
Maximum discharge	190 l/s
Discharge sediment pump	4 l/s

Rainfall simulator

To test the impact of a raindrop on a soil surface and test the vulnerability of a soil type to overland flow and erosion, a rainfall simulator has been installed. The pressure driven rainfall generator is equipped with two different nozzle systems for generating different rainfall intensities.

Technical specifications
Test reach length	6.0 m.
Width	2.5 m.
Depth	0.6 m.
Maximum inclination	15 degrees
Height nozzles	3 m.

Teaching facilities

Closed conduits model

Two types of energy losses in closed conduits can be studied in this model:

friction losses (caused by friction at the inner wall of the conduit) and
local losses (caused by sudden changes in the conduit).

Large demonstration flume

This 5 m long and 0.3 m wide flume allows students to study a wide range of topics including the hydraulics associated with different types of weir and sluice gate. Bed roughness and channel slope can also be adjusted and the apparatus includes a closed sediment circuit which allows a sand sediment load to be fed into the flow enabling bedload transport rates and phenomenon such as local scour around bridge piers to be investigated.

Small demonstration flume

This 2.5 m long and 0.08 m wide flume provides students with the ability to study fluid flow phenomenon associated with weirs and sluice gates. Sediment can also be applied to the bed to demonstrate bedform dynamics and sediment transport. The flow system is entirely self-contained and the flume is portable meaning it can be move into any suitable laboratory or class environment for use.

Venturi meter and orifice

Measuring discharges in closed conduits is possible with an orifice or Venturi meter. Students learn how these widely used systems are working by applying the energy conservation law and the equation for continuity of mass.

Onderzoek

Onderwijs

Mensen

Voor vragen over de de faciliteiten van het Kraijenhoff van der Leur Laboratorium voor Water en Sedimentdynamica, planning en praktische informaitie, kunt u contact opnemen met de labbeheerders. Voor inhoudelijke vragen kunt u terecht bij de leerstoelgroepen, die betrokken zijn bij het onderzoek in het lab.