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Remotely sensed river surface features compared with modeling and in situ measurements

Plant, William J. ; Branch, Ruth ; Chatham, Gene ; Chickadel, C. Chris ; Hayes, Ken ; Hayworth, Bronwyn ; Horner-Devine, Alexander ; Jessup, Andrew ; Fong, Derek A. ; Fringer, Oliver B. ; Giddings, Sarah N. ; Monismith, Stephen ; Wang, Bing

Journal of Geophysical Research. B. Solid Earth, 2009-11, Vol.114 (C11), p.n/a [Periódico revisado por pares]

Washington, DC: Blackwell Publishing Ltd

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  • Título:
    Remotely sensed river surface features compared with modeling and in situ measurements
  • Autor: Plant, William J. ; Branch, Ruth ; Chatham, Gene ; Chickadel, C. Chris ; Hayes, Ken ; Hayworth, Bronwyn ; Horner-Devine, Alexander ; Jessup, Andrew ; Fong, Derek A. ; Fringer, Oliver B. ; Giddings, Sarah N. ; Monismith, Stephen ; Wang, Bing
  • Assuntos: Earth sciences ; Earth, ocean, space ; Exact sciences and technology ; Freshwater ; Marine ; Oceanography ; Remote sensing ; river flow ; river surface features ; rivers and estuaries
  • É parte de: Journal of Geophysical Research. B. Solid Earth, 2009-11, Vol.114 (C11), p.n/a
  • Notas: istex:B7DF1B4610C246CED541E5ED803DE674AB83619D
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  • Descrição: Images of river surface features that reflect the bathymetry and flow in the river have been obtained using remote sensing at microwave, visible, and infrared frequencies. The experiments were conducted at Jetty Island near the mouth of the Snohomish River at Everett, Washington, where complex tidal flow occurs over a varied bathymetry, which was measured as part of these experiments. An X band (9.36 GHz) Doppler radar was operated from the river bank and produced images of normalized radar cross sections and radial surface velocities every 20 min over many tidal cycles. The visible and infrared instruments were flown in an airplane. All of these techniques showed surface evidence of frontal features, flow over a sill, and flow conditioned by a deep hole. These features were modeled numerically, and the model results correspond well to the remote observations. In situ measurements made near the hole showed that changes in measured velocities correlate well with the occurrence of the features in the images. In addition to tidal phase, the occurrence of these features in the imagery depends on tidal range. The surface roughness observed in the imagery appears to be generated by the bathymetry and flow themselves rather than by the modulation of wind waves.
  • Editor: Washington, DC: Blackwell Publishing Ltd
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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