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Laboratory upwelled radiance and reflectance spectra of Kerr reservoir sediment watersReflectance, chromaticity, and several other physical and chemical properties were measured for various water mixtures of bottom sediments taken from two sites at Kerr Reservoir, Virginia. Mixture concentrations ranged from 5 to 1000 ppm by weight of total suspended solids (TSS) in filtered deionized tap water. The two sets of radiance and reflectance spectra obtained were similar in shape and magnitude for comparable values of TSS. Upwelled reflectance was observed to be a nonlinear function of TSS with the degree of curvature a function of wavelength. Sediment from the downstream site contained a greater amount of particulate organic carbon than from the upstream site. No strong conclusions can be made regarding the effects of this difference on the radiance and reflectance spectra. Near-infrared wavelengths appear useful for measuring highly turbid water with concentrations up to 1000 ppm or more. Chromaticity characteristics do not appear useful for monitoring sediment loads above 150 ppm.
Document ID
19820013900
Acquisition Source
Legacy CDMS
Document Type
Technical Publication (TP)
Authors
Witte, W. G.
(NASA Langley Research Center Hampton, VA, United States)
Whitlock, C. H.
(NASA Langley Research Center Hampton, VA, United States)
Morris, W. D.
(NASA Langley Research Center Hampton, VA, United States)
Gurganus, E. A.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
September 4, 2013
Publication Date
March 1, 1982
Subject Category
Environment Pollution
Report/Patent Number
L-14992
NASA-TP-1993
NAS 1.60:1993
Accession Number
82N21774
Funding Number(s)
PROJECT: RTOP 691-09-02-01
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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