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Colorado River in Grand Canyon

Colorado River in Grand Canyon. Colorado River in Grand Canyon. Fine sediment leads to substantial attenuation along the beam path Fines are mostly clay in the this river. Backscatter (dB). Distance along beam (m). Colorado River in Grand Canyon. Sand sizes influence the backscatter level

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Colorado River in Grand Canyon

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  1. Colorado River in Grand Canyon

  2. Colorado River in Grand Canyon Fine sediment leads to substantial attenuation along the beam path Fines are mostly clay in the this river Backscatter (dB) Distance along beam (m)

  3. Colorado River in Grand Canyon Sand sizes influence the backscatter level Suspended sand is typically ~100 µm Backscatter (dB) Distance along beam (m)

  4. Field calibrations Fines SSC correlates with attenuation Sand SSC correlates with backscatter Backscatter (dB)

  5. Scattering theory Not typically in suspension in rivers 1000 kHz frequency

  6. Sacramento River and SF Bay

  7. Calibrate ADV backscatter to LISST concentration

  8. Compute turbulent sediment fluxes from ADV velocity and calibrated backscatter

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