||Black Hawk Lake, Sac County, Iowa.
||Pacific Northwest Environmental Research Lab., Corvallis, Oreg.;Iowa Dept. of Environmental Quality, Des Moines.;Iowa National Guard, Des Moines.;National Environmental Research Center, Las Vegas, Nev.
Water pollution ;
Black Hawk 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.