Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Numerical and graphical procedures for estimation of community photosynthesis and respiration in experimental streams /
Author Gulliver, John S.
Other Authors
Author Title of a Work
Mattke, Tedd W.
Stefan, H. G.
Publisher U.S. Environmental Protection Agency, Environmental Research Laboratory ; Center for Environmental Research Information [distributor],
Year Published 1983
Report Number EPA/600-S3-82-052
OCLC Number 09902663
Subjects Photosynthesis. ; Respiration. ; Water--Experiments.
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD ARCHIVE EPA 600-S3-82-052 In Binder Headquarters Library/Washington,DC 04/12/2018
EJBD  EPA 600-S3-82-052 In Binder Headquarters Library/Washington,DC 11/14/2018
Collation 5 pages : illustrations ; 28 cm
Caption title. At head of title: Project summary. "Dec. 1982." "EPA/600-S3-82-052."
Contents Notes
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 die! D.O. measurements in a stream. The model differs from existing procedures for die! 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 D.O. The model is applied to the experimental field channels at the US EPA Monticello Ecological Research Station to compute P and R values at different seasons and under different water temperature, solar radiation, and pH conditions. A sensitivity analysis shows that computed P and R values are most sensitive to residence times and surface oxygen exchange, (reaeration) coefficients. New equations for surface exchange, including the effect of wind, have been developed and summarized. Hysteresis in plots of hourly P versus photosynthetically active radiation (PAR) intensity was observed frequently. It was of such magnitude that it could not be caused by errors in surface exchange estimates or other physical processes.