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Publicado el: 2022-02-22
Tiempo de estudio aproximado: 1.00 - 1.25 h
Incluye sonido: no
Áreas temáticas
Geospatial
Oceanography/Marine/Tsunami
Descripción:
Coastal water levels rise and fall for many reasons, including the rhythm of the tides and other factors. People measure water levels for many purposes, including safe navigation, marsh restoration, coastal mapping, and monitoring sea level change. Management of the coastal zone can be drastically improved by precisely and accurately knowing how water levels relate to land elevations. As a result, working in this area frequently requires measuring water levels and conducting a proper survey. This lesson provides guidance on the survey design choices to be made when measuring water levels, including siting, choosing instrumentation, observing water levels, and surveying a water level station. A major theme throughout the lesson is how to reduce uncertainty in water level measurements and the resulting tidal datums.
Objetivos:
After completing the lesson, you should be able to do the following:
- Describe the acceptable total uncertainty for water levels and products for your project.
- Describe the conditions that require the collection of local water levels. (i.e., when will an existing tidal station suffice?).
- Determine the factors influencing the type of station, its location, and deployment duration.
- Recall the steps required to install a water level station.
- Collect and analyze data, including data QA/QC.
- List and describe the error sources in water level measurements and products.
- List and describe best practices for minimizing errors.
Palabras clave
tides, water levels, uncertainty, tidal datum, inundation, NTDE, national tidal datum epoch, primary water level station, secondary water level station, tertiary water level staiton, NWLON, National Water Level Observing Network, VDatum, New River Estuary, telemetry, GPS, GNSS, tidal bench mark, local control mark, NSRS, National Geodetic Survey, NGS, Center for Operational Oceanographic Products and Services, CO-OPS, GNSS-R, pressure sensor, staff gauge, leveling, Real-time Kinematic, RTK, Real-time Network, RTN