WATER QUALITY IN MIXING ZONES

A method has been developed to delineate quantitatively waste concentrations throughout waste effluent mixing zones on the basis of densitometric measurements extracted from aerial photographs. A "mixing zone", as defined herein, is the extent of a receiving-water body utilized to dilute a waste discharge to a concentration characteristic of a totally mixed condition. Simultaneously-acquired color- infrared photographs and suspended solids water samples have been used quantitatively to delineate the mixing zone resulting from the discharge of a paper mill effuent at a study site within the state of Wisconsin. Digital scanning microdensitometer data were used to estimate and delineate suspended solids concentrations on the basis of a semi-empirical model. The results and experiences of the study have indicated that photographic photometry, if predicted on a limited amount of ground sampling, can be used to measure and delineate mixing-zone waste distributions as reliably and in more detail than conventional surface measuring techniques. The method has direct application to: (1) the establishment of definite and rational water quality guidelines; (2) the development of sampling and surveillance programs for use by governmental and private agencies; and (3) the development of design and location criteria for industrial and municipal waste effluent outfalls. /Author/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00991112
• Corporate Authors:

  American Society of Photogrammetry

  105 North Virginia Avenue
  Falls Church, VA  United States  22046
• Authors:
  • Lillesand, T M
  • Scarpace, F L
  • Clapp, J L
• Publication Date: 1975-3

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 285-298
• Serial:
  • Photogrammetric Engineering and Remote Sensing
  • Volume: 41
  • Issue Number: 3
  • Publisher: American Society for Photogrammetry and Remote Sensing
  • ISSN: 0099-1112

Subject/Index Terms

• TRT Terms: Aerial photography; Chemical concentration; Densitometers; Effluents; Industrial wastes; Infrared photography; Measurement; Sewerage; Wastewater; Water quality
• Uncontrolled Terms: Concentration
• Old TRIS Terms: Sewage effluents
• Subject Areas: Design; Highways;

Filing Info

• Accession Number: 00095968
• Record Type: Publication
• Files: TRIS
• Created Date: Jul 2 1975 12:00AM