Description
The Rising Stage Sampler (RSS) is a horizontal intake sampler for sampling suspended sediments coarser than 62 microns. The intake is inclined slightly downward to prevent the accumulation of sediment in the outer end of the intake.
The use of the RSS is recommended where water surface surge does not exceed 65 mm (2.5 inches) and the velocity does not exceed 1.2 m/s (4 feet/sec).
The Rising Stage Sampler is made from robust durable material, and it is easy to install and maintain. Containers in different sizes, stands and a mounting assembly are available.
Operation of the Rising Stage Sampler is as follows.
As the water rises in a creek it reaches the crown of the intake and flows begins to fill the bottle. As the water level continues to rise, bottles at a higher level also start to fill. Sampling in each bottle continues until the level of the water in the bottle reaches the inner end of the air exhaust that prevents further circulation through the sampler. An airlock also forms in the intake and prevents enrichment of the sample from water flowing back and forward in the intake and transporting sediment into the sample container.
Field personnel can then collect the representative sample on the next occasion they are on site.