L. Han D. C. Rundquist Brian L. Tolk 2000 <p><span>Two experiments were conducted outdoors to investigate how bottom brightness impacts the spectral response of a water column under varied suspended sediment concentrations. A white aluminum panel placed at the bottom of the tank was used as the bright bottom, and a flat-black tank liner served as the dark bottom. Sixteen levels of suspended sediment from 25 to 400 mg litre&nbsp;</span>^-1<span>&nbsp;were used in each experiment. Spectral data were collected using a Spectron SE-590 spectroradiometer. The major findings include the following: the bright bottom had the greatest impact at visible wavelengths; when suspended sediment concentrations exceeded 100 mg litre&nbsp;</span>^-1<span>, the bright bottom response was found to be negligible; and, substrate brightness has minimal impact between 740 and 900 nm, suggesting that these wavelengths are best for measuring suspended sediment concentrations by means of remote sensing.</span></p> application/pdf 10.1080/01431160050029558 en Taylor & Francis The impact of bottom brightness on spectral reflectance of suspended sediments article