Accession Number : ADA018278

Title :   Suspended Sediment Determination in Estuarine Waters from Photometer and Secchi Disc Measurements.

Descriptive Note : Final rept. 1 Jul-30 Aug 74,


Personal Author(s) : Williams,Jerome

Report Date : 10 OCT 1975

Pagination or Media Count : 15

Abstract : A mathematical light scattering model previously developed by the author sums the attenuating effects of a stack of particle containing 'plates'. One of the unknown quantities in this model is the relative amount of light scattered in a backward direction by each particle. By considering the effects of multiple scattering, the portion of light scattered in a backward direction is calculated and turbidity paramaters are then easily related to the relative irradiance loss coefficient and the attenuation coefficient. These are directly obtainable from photometer and Secchi disc measurements. Data are presented from the Chesapeake Bay which compare average particle sixe and total suspended load as determined by laborious visual counting and sizing techniques and by direct calculation from photometer and Secchi disc measurements.

Descriptors :   *Sediments, *Estuaries, *Test equipment, *Particles, Measurement, Optical instruments, Photometers, Light scattering, Instrumentation, Oceanographic equipment, Chesapeake Bay, Turbidity, Mathematical models

Subject Categories : Physical and Dynamic Oceanography
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE