||Report on Black Lake, Natchitoches and Red River Parishes Counties, Louisiana : EPA Region VI /
||National Eutrophication Survey, Las Vegas, Nev. ;Corvallis Environmental Research Lab., Oreg. ;Louisiana Wildlife and Fisheries Commission, New Orleans. ;Louisiana National Guard, Baton Rouge.;Environmental Monitoring and Support Lab., Las Vegas, Nev.
|| Corvallis Environmental Research Laboratory ; Environmental Monitoring & Support Laboratory,
||EPA NES-WP-531; Working Paper-531
Eutrophication--Louisiana--Black Lake. ;
Black Lake (La.) ;
Black Lake (Louisiana)
Water pollution ;
Black Lake ;
Water quality ;
Inorganic phosphates ;
Inorganic nitrates ;
Pollution abatement ;
Water quality management ;
Water quality data ;
Natchitoches Parish(Louisiana) ;
Red River Parish(Louisiana)
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||vi,  pages : map ; 27 cm.
Annual total phosphorus and total nitrogen loadings to the lake were estimated and subdivided according to either point or non-point source origin. An assessment of the lake's trophic condition and limiting nutrient is also provided. All data collected by the U.S.E.P.A. National Eutrophication Survey during the one year study of the lake and its tributaries are included.
"March, 1977." "EPA NES-WP-531." Cover title. Includes bibliographical references (page 8).