||Birch Lake, Cass County, Minnesota.
||Pacific Northwest Environmental Research Lab., Corvallis, Oreg.;National Environmental Research Center, Corvallis, Oreg.;National Environmental Research Center, Las Vegas, Nev.;Minnesota Pollution Control Agency, Minneapolis.;Minnesota National Guard, Minneapolis.
Water pollution ;
Birch Lake ;
Inorganic phosphates ;
Inorganic nitrates ;
Primary biological productivity ;
Chemical properties ;
Water quality ;
Water quality data ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
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 in the report.