| Bathymeteric
Survey |
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| • | What is a
Bathymeteric Survey? |
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| – | Lake bottom land
contour mapping |
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| – | Lake bottom land
sediment depth mapping |
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| • | How does it work? |
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| – | Dual-Frequency
sonar measures depth to the |
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| bottom land and
the depth to the silt-bottom |
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| – | Each measurement
is coordinated to the GPS |
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| position where
the measurement was taken |
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