The Teledyne Marine Channel

Computing Discharge in Real Time using the Q-Track Automated Continuous...

Mon, 03 Feb 2020 09:28:05 GMT

The Central Midwest Water Science Center has developed, installed, and operated an automatic system for computing discharge. The Q-Track system, as it is known, consists of a TRDI acoustic Doppler velocity meter (ADVM) attached to a carriage that traverses vertically on a track assembly on the side of the canal. The system is controlled by a data logger and computes discharge in real time. The Q-Track system is installed at a site that is the subject of much litigation and for which the discharge is very unsteady. The Q-Track system is being evaluated as an alternative to 'standard' approaches used by the USGS to compute continuous discharge records at this location. This talk will present the results of an evaluation of two methods for computing real-time discharge using the Q-Track system, the mid-section method and the horizontal slice method. The methods for computing discharge will be presented, along with the assumptions and limitations inherent in the method. The discharges computed using Q-Track are compared to the “official” discharge record at the site, which makes use of the index-velocity method.

Presented by:

Kevin Oberg
USGS

Measured Flow Disturbance Around Different ADCPs and Mounts

Thu, 23 Jan 2020 09:57:05 GMT

NVE has mesured flow disturbance around various ADCPs and mounts/floats/trimarans to try to confirm or dispute previous studies by OSW, USGS. The background/reason for doing this is that after starting to use the OSW, USGS extrap/qrev software and alarming number of measurements show tat the vertical velocity distribution shall be constant/no-slip, and not power/power. The method has been to drive long reaches on a still lake and to compare the water velocities close to the instruments by the velocities at some depth. If no flow disturbance, they will be the same. If disturbed flow, there will be a difference.

Presented by;
Kristoffer Florvaag-Dybvik
NVE (Norwegian Water Resources and Energy Directorate)

Using Multibeam SONAR Technology Through the Life of Marine Construction...

Mon, 20 Jan 2020 09:07:29 GMT

In marine construction projects, work is often done “in the blind”. Using multibeam SONAR technology can aid this process in all phases of the project. Pre-construction scans can provide a base line look at an area. This can help put real numbers on quantities as well as highlight any anomalies in the project area that may have otherwise gone unnoticed. This additional information increases the accuracy of estimates and the effectiveness of planning. During the construction phase, multibeam SONARs mounted on construction barges can provide real-time progress updates allowing the operator to work with the most up to date information. The SONAR data integrates seamlessly with marine construction machine guidance software to create a total solution package. In the Post-construction phase, multibeam SONARs can be used to create As-Built surfaces of the finished product as well as validate that build specifications were met. This presentation provides recent, real-world examples of multibeam SONAR use during marine construction project phases as described.

Learn more about Teledyne Marine dredge and construction solutions>

Presented by:
Nathan Keys

Measutronics

at Teledyne Marine Technology Workshop 2019

The Technological Evolution of Dredging

Wed, 15 Jan 2020 13:10:31 GMT

From its inception in the late 1800's, the hydraulic, or pipeline, dredge has been the dominant machine used for near-shore and in-shore sediment transportation in the United States. These dredges were initially deployed to maintain sufficient channel depths to facilitate river navigation, port access and development. Infrastructure development after World War II created an inland market for sand and gravel mining dredges used in the production of concrete and asphalt. This material dredging market is at least an order of magnitude larger than the navigational dredging market in the US. Other public and consumer concerns, such as environmental remediation and coastal restoration, have created niche dredging strategies and equipment.

Learn more about Teledyne Marine dredge and construction solutions>

Hydraulic dredges have evolved from steam powered, manually controlled devices to sophisticated, energy efficient machines designed to present minimal negative effects on the environment. The equipment being manufactured today incorporates advanced algorithms to predict pipeline lengths, elevations, particle grain size, and required transport velocities. Many of these machines assist the operator in controlling the dredge's navigational path and speed as well as the production rate. In the next several months, several dredges in North America will be deployed with autonomous capabilities that include artificial intelligence and real-time sub-surface imaging and mapping with the primary goal of increased efficiency with less risk.

Presented by:
William Wetta
DSC Dredge LLC

At Teledyne Marine Technology Workshop 2019

Teledyne RESON SeaBat T-Series Multibeam Sonars and Turbidity in Real-Time...

Fri, 10 Jan 2020 15:14:10 GMT

During most dredging operations, survey verification of having met grade and other contract requirements comes after the dredge has completed its work in a designated work area and hence moved on. What if the post-dredge survey reveals that the dredge has not fully met contract obligations? When this happens, the additional time, effort and expense to get the dredge back into position to remove what was missed can undermine the success of a project. What if the dredge operator could have “eyes under water” and confirm that grade requirements have been met before moving on?

During dredging operations, the material on the bottom is disturbed and released into the water column. Turbidity is a measure of the presence of suspended particulates. The more suspended solids in the water column, the higher the turbidity. High turbidity can create issues for sonar performance in that the suspended solids act as an acoustic reflector.
As barge mounted sonars are being used in the marine construction industry more frequently, dredge operators are considering the use of sonar to provide information in advance of post-dredge surveys. The “As-Building” benefits can be substantial but there is a concern over the effect turbidity can have on the acoustics.

Utilizing the Teledyne RESON SeaBat T-Series advanced bottom tracking abilities in various dredging operations, with varied levels of turbidity, we have begun to both demonstrate the value and quantify the limits of sonar usage during dredging operations. This presentation presents our results thus far.

Presented by:
Keith Dixon
Measutronics Corporation

At Teledyne Marine Technology Workshop 2019

Keynote: First Descent: Indian Ocean 2019-2022

Mon, 02 Dec 2019 13:27:02 GMT

Oliver Steeds presents First Descent: Indian Ocean 2019-2022, a series of Expeditions to explore and conserve the world's most unknown and least protected ocean, the Indian Ocean. From submersibles to ROVs, from sensors to camera systems, Teledyne Marine's Sea of Solutions have been deployed through the mission to conduct multidisciplinary research and amplify ocean awareness. During the first Expedition: First Descent: Seychelles 2019, the mission partnered with Associated Press and Sky to broadcast a series of world firsts from the submersibles including a live documentary series, newscasts and a Presidential Address. The Seychelles' President's live broadcast became the largest news story of the day and Associated Press estimated that coverage of the Mission across TV, print and digital reached 3.5billion people.