|The SediMeter™ measures a vertical turbidity profile and estimates the bottom level with high precision|
|Use it to monitor...
Description: The northern part of the Caspian Sea has a large input of sediments from the Volga and Ural rivers, and the depth is only around 5 meters in a large area. A harbor development plan in Kazakhstan required the dredging of a 70 km long navigation channel through this area. SediMeter™ instruments were deployed to assess the sedimentary environment, taking advantage of their ability to measure the near-bed turbidity. The SediMeter™ can also be used to detect the presence of bedload transport as opposed to suspended sediment transport, and to measure the infilling of the navigation channel post-dredging.
Where: Caspian Sea
Who: Gravity Environmental
Why: Project to build an oil export terminal with a 70 km dredged channel
What: Collect data for the Environmental, Social, and Health Impact Assessment (ESHIA) program
Description: A SediMeter™ was deployed in this water reservoir in order to collect data on the timing and amount of sedimentation in the water reservoir. Traditional methods include repeat measurements of the bed level, and taking of sediment cores, but they only allow the measurements of the net change between measurements, and are unable to register what exactly happens, and when it happens. In order to optimize the methods for decreasing sedimentation and-the other side of the coin-soil erosion, it is important to understand the processes. The SediMeter™ can be used to quantify near-bed suspended sediment, sediment accumulation, and even measure sediment consolidation. It thus gives a lot more information for the scientist or engineer that is trying to come up with ways in which to protect the farmlands from erosion, and the reservoirs from sediment infilling.
Where: Water reservoir
Who: University of Zambia
Why: Soil Erosion Research
What: Measure sedimentation rate in water reservoirs
Description: SediMeter™ instruments were deployed in the Ohio River, West Virginia, to measure sediment deposition over mussel beds during maintenance dredging on the river.
Where: Ohio River, West Virginia
Why: Maintenance dredging threatened mussel banks
What: Monitor sedimentation/siltation from dredging
Description: In 2007, the Port of Olympia found elevated levels of dioxins in an area scheduled for maintenance dredging. The contaminated sediments have since been dealt with. During this project SediMeters™ were deployed in the area to monitor for near-bed elevated turbidity levels. The SediMeter™ instruments were mounted on steel platforms for sedimentation measurements in the Budd Inlet.
Where: Budd Inlet, Washington State
Who: Gravity Environmental
Why: Polluted Sediments Cleanup
What: Measure sedimentation in the inlet
“...recommending that sedimeters be installed to monitor sedimentation on reef tracts..."
Coastal Engineering Administrator in Florida Department of Environmental Protection
"...dredge monitoring ... there is not much out there that is as simple and cost effective."
Senior Environmental Scientist in an engineering consulting company
"Sedimeter sensors designed and built by Lindorm are a fantastic tool for measuring water column turbidity and siltation." Link
"The SediMeter proved a reliable means of providing continuous measurements during the study period with respect to accuracy."
Kevin Daniel Denn, University of Iowa master thesis, p 84.