Wave and Tidal Monitoring Articles

  • Peru Navy Tide Gauge Network developed by GEONICA recorded neatly the 2011 Japan tsunami

    BACKGROUND The Directorate of Hydrography and Navigation of Peru ( HIDRONAV ), dependent of Peru Navy, has acquired from GEONICA S.A. a System consisting of Ten (10) Tide Gauges Stations including still images cameras and One (1) Control Center which are, nowadays, totally functional. Hence, the Peru Nation has been ...


    By Geonica SA

  • Ultrasonic Sensors: Range Vs Frequency

    Ultrasonic sensors are pretty cool. Transducers send and receive waves, measurements magically get spit out by the sensor, and nothing had to touch anything, right? You can choose sensors based on range, or type of transducer, or even safety ratings. Most sensors declare their range and frequency together, which seems kind of odd. Why is the range of an ultrasonic sensor tied to its frequency? ...

  • Case Study Norderney LOG_aLevel_ENG

    Northsea Wave and Level Measuring Station In the operation of the research centre coast of the NLWKN–Norden-Norderney Apart from the coastal engineering, the coastal surveying and morphology, the storm tide warning service of the NLWKN-Norden-Norderney belong to the specific questions and tasks of the coastal area. The German Wadden Sea and ...


    By General Acoustics e.K.

  • Hydrodynamic performance of retrofitted offshore structures using perforated cylinders

    Direct impact caused by the waves on ocean structures can be efficiently reduced by encompassing the member with a perforated cover. One of the successful attempts to reduce wave forces on the damaged members is using perforated outer cover on a damaged member. Experimental investigations are carried out on perforated outer cylinder encompassing the inner cylinder for different perforation ratios ...


    By Inderscience Publishers

  • Comparison of Directional WaveGuide Radar with Directional WaveRider Buoy

    Abstract Down looking FMCW radars for measuring water level, tides and wave height have been in use for 25 years. A combination of three down looking FMCW radars, mounted on an o↵ shore location, can be used to accurately measure ocean wave height and wave direction. At locations where an o↵shore mounting construction is readily available, the major advantage of this relatively ...


    By Radac BV

  • A new packing structure with innovative advantages

    Abstract The Raschig Super-Pak is a new geometric packing design which through an innovative structure, has three major advantages over other high-performance packing: lower pressure drop, higher capacities, and better separation efficiency. The performance data measured at the Separations Research Program (SRP) at the University of Texas at Austin are presented and evaluated in ...


    By Raschig USA Inc.

  • Intercomparison of a WaveGuide radar and two Directional Waveriders

    Down-looking FMCW radars for wave measurements are in use already for 25 years. They have proved to be very robust and maintenance is hardly needed. Now the prices of FMCW radars came down they are being more widely applied for water level, tide, harbour oscillations and wave height at sea, lakes and rivers. Radacs WaveGuide was introduced in 1998 based upon a commercial tank radar, first Enrafs ...


    By Radac BV

  • Measurement of Shear Waves in Laboratory Specimens by Means of Piezoelectric Transducers

    The use of piezoelectric ceramics to measure shear wave velocity in laboratory soil specimens is discussed. The experimental technique and interpretative methodology are described. Both bender and flat-plate ceramic elements were employed, and each performed well. Interpretation of the shear waveforms generated with each transducer improved as the number of wavelengths between the source and ...


    By ASTM International

  • Study of Geoprocesses with Complementary Mechanical and Electromagnetic Wave Measurements in an Oedometer

    Particulate geomaterials can be uniquely studied with wave-based techniques. Electromagnetic and mechanical waves interact with the tested material, exciting different phenomena and revealing different information. Complementary wave measurements were implemented in a modified oedometric cell to study and to monitor different processes in geomaterials. The cell and the measuring devices are ...


    By ASTM International

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