HM 144 demonstrates important phenomena of bed-load transport in the area near the bottom at subcritical discharge. The dimensions of the experimental section enable the modelling of small river courses.
The core element of the HM 144 experimental flume is the stainless steel experimental section. A sediment layer up to 12cm high covering an area of 2x1m allows bed-load transport to be studied. The inclination of the experimental flume can be adjusted to allow simulation of slope.
The flow enters the experimental section through one of the three inlet elements. The inlet elements have different geometries and each contains a foam insert to calm the flow. The selected inlet element can be freely positioned in the experimental section and is held in position by the sediment. A filter element is provided in the water outlet to held the sediment in the experimental section. The closed water circuit is supplemented by a storage tank and a pump.
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 flow rate is measured via a rotameter.
