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NUMERICAL AND GRAPHICAL PROCEDURES FOR ESTIMATION OF COMMUNITY PHOTOSYNTHESIS AND RESPIRATION IN EXPERIMENTAL STREAMS
Citation:
Gulliver, J., T. Mattke, H. Stefan, AND K. Hokanson. NUMERICAL AND GRAPHICAL PROCEDURES FOR ESTIMATION OF COMMUNITY PHOTOSYNTHESIS AND RESPIRATION IN EXPERIMENTAL STREAMS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/3-82/052.
Description:
A numerical dissolved oxygen (D.O.) routing model DORM is developed to determine total stream community photosynthesis (P) and community respiration rates (R) through successive routing of two-station diel D.O. measurements in a stream. The model differs from existing procedures for diel curve productivity analysis in that it uses the complete D.O. transport equation, including D.O. surface exchange, longitudinal dispersion, dependence of respiratory rates on water temperature and dissolved oxygen. The model is applied to the experimental field channels at the USEPA Monticello Ecological Research Station to compute P and R values at different seasons and under different conditions of water temperatures, solar radiation, and pH.