Record Display for the EPA National Library Catalog


Main Title Fluorometric Technique for Sampling in Large-River Ecosystems.
Author McNab, C. D. ; Mille, E. F. ; Johan, D. R. ;
CORP Author Minnesota Univ., Minneapolis. Water Resources Research Center.
Year Published 1971
Report Number WRRC-Bull-34; OWRR-B-010-Minn; 12421,; B-010-Minn(3)
Stock Number PB-202 700
Additional Subjects ( Rivers ; Ecology) ; ( Ecology ; Sampling) ; ( Limnology ; Tracer studies) ; Chemical analysis ; Hydrology ; Stream flow ; Biomass ; Mississippi River ; Minnesota ; Fluorometric analysis
Library Call Number Additional Info Location Last
NTIS  PB-202 700 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 22p
A section of the Mississippi River between miles 719 and 722 upstream from St. Louis was used to study large river ecosystems. The flow of the river during the time of the study was between 40,000 and 70,000 cfs. The dimensions of the area and the paths of travel along which the movement of dye was studied are shown. Water along these paths does not intermix. One path is a continuation from upstream of the main navigation channel of the river. Tracer studies indicate that the water moving along this path through the study section has little interaction with the immediate shore zone. The limnological character of this water has been largely fixed by upstream mixing prior to entry on the path. Another path drains an inshore area that has a rather regular beach boundary upstream. Along this course, there is an input of water from shallow areas. These shallow backwaters are of particular limnological interest since the production upon which the food-web of the ecosystem is built appears to occur here. The areas of main current are likely avenues for the dispersal of this production.