underwater instrument Articles

  • Case Study - Lacustrine: Underwater Resistivity Surveys

    Lake Travis – Austin, Texas Objective:  Locate buried pipeline and map the limestone bedrock surface Site:  Lake Travis, near Austin, Texas USA during the AGI Marine Resistivity Seminar Date:  May 1, 2014 and May 7, 2015 Instrument:  SuperStingR8 WiFi, SwitchBox56, underwater marine cable with 28 electrodes spaced at 6m. ...


    By Advanced Geosciences, Inc.

  • Surveying and mapping the nearshore Underwater topography of Zhuhai delta island - Case study

    project background :due to Zhuhai delta island nearshore’water too shallow ,great ship can not drive closely, Artificial boating surveying and mapping is require much time and effort  ,can not get accurate data and unsafe Equipment:Surveying and mapping unmanned ship(ME70、pilot) 、2 Sounding instruments ...


    By Oceanalpha Co., Ltd.

  • Media expansion monitoring improves filtration

    In municipal surface water treatment plants, optimum filter performance is a crucial component. Filtration is the primary treatment process at water treatment plants, and backwashing is the primary means to keep filters functioning properly to produce safe drinking water for the public. Since 2000, Entech Design, Inc. has used underwater acoustic sensing technology to monitor filter media ...


    By Entech Design, Inc.

  • Condenser performance monitoring, control and optimization

    Abstract During the past sixteen years, understanding of the condensation process within condensers has been advanced through the introduction of new monitoring and control instrumentation. Data gathered from a variety of condenser types employing these instruments have allowed comprehension of the condensation process to be advanced to the point where underperforming regions of tube ...


    By Intek, Inc.

  • Scintillation effect in LISST – The importance of temperature differences

    Scintillation is what makes stars twinkle. It is what causes mirage in deserts or on hot surfaces. It is what causes shimmer underwater in the vicinity of hot vents in oceans. These effects result from temperature fluctuations in air or water. The same effect can occur in a LISST optics cell if not properly controlled . The importance of scintillation in LISST instruments first became evident ...


    By Sequoia Scientific, Inc.

  • Mapping Bedrock Surfaces Near Lake Travis, Texas - Case Study

    In May 2014 and May 2015, AGI conducted a hydrogeology workshop focused on training students how to use a resistivity meter for groundwater exploration at Lake Travis near Austin, Texas. Why groundwater exploration? This ...


    By Advanced Geosciences, Inc.

  • How the LISST-ABS works

    INTRODUCTION: Sequoia’s Acoustic Backscatter Sensor, LISST-ABS is designed to measure suspended sediment concentration at a point. Unlike ADCP’s which may record similar backscatter strength at multiple points along the acoustic beams (‘ranges’), the LISST-ABS  only reports backscatter signal strength at a single point about 5 cm from the transducer. The ...


    By Sequoia Scientific, Inc.

  • Valeport Supports Search for New Marine Discoveries

    Valeport’s latest CTD profiler is supporting scientists with leading edge research to expand knowledge of marine biodiversity. The fastCTD profiler has been designed to deliver the ...


    By Valeport Ltd

  • Carbon Credits Explained

    Carbon Credits Explained Over the past one hundred years the capitalist economy we live in has improved our way of living. It's enabled us to progress itself through the years. The free market has provided us with the resources to travel the globe, to give us products beyond our wildest dreams and to build great cities. The free markets accurately reflect ...


    By Carbon Investments

  • Searching for Archeological Anomalies in the Oluz Mound - Case Study

    The History Of The Oluz Mound The Oluz Mound near Amasya, Turkey, is a very important ancient Turkish settlement with a history stretching back to 4,500 B.C. For archaeologists, this site in Central Turkey is an exciting opportunity to discover not just the area’s history, but the history of the birthplace of civilizations. ...


    By Advanced Geosciences, Inc.

  • The Light at the End of the Tunnel - How to Successfully Operate a UV Disinfection System

    ABSTRACTOver the past ten years, ultraviolet (UV) technology has become a commonly applied method of disinfecting of wastewater effluent. UV disinfection involves passing wastewater effluent through a confined chamber with rows of underwater lamps emitting UV energy. Viruses and bacteria become inactivated upon exposure to dosages of UV energy, thereby disinfecting the wastewater. The UV system ...

  • 3D Offshore Imaging for Seawater Intake for Desalination Plants - Case Study

    AGI’s Multi-Electrode Switch Box is an accessory to the SuperSting Wi-Fi. It allows the SuperSting Wi-Fi to automatically ...


    By Advanced Geosciences, Inc.

  • Noise Measurement

    Definitions Threshold and criterion levels The threshold level is the A-weighted sound level at which a personal noise dosimeter begins to integrate noise into a measured exposure. For example, if the threshold level on a sound level meter is set at 80 decibels (dB), it will capture and integrate into the computation of dose all noise in the employee's hearing zone that equals or exceeds 80 dB. ...


  • Ocean science for sustainable development: Facts and figures

    Sarah Grimes explores why we need good ocean monitoring, how to get it, and why it still fails Small Island Developing States. Oceans are a critically important component of the Earth system, supporting ecosystem and human health. They regulate the weather and climate; are essential for producing freshwater; and soak up ...


    By SciDev.Net

  • At what Speed is Greenland’s Ice Sheet Melting?

    Greenland – Overview Greenland is an island and autonomous Danish territory located between the North Atlantic and Arctic Ocean. Most of the land is covered by a massive ice sheet. In fact, this ice sheet is one of the only two existing on this Earth. The other ice sheet covers Antarctica. The Greenland Ice Sheet (GrIS) covers approximately 81 percent of Greenland. This ice sheet is ...


    By Climate Institute

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