Abstract
Rainwater was collected near culturally eutrophic Lake Sallie, Minnesota. Rain pH was low, but sulphuric acid did not appear to be the causative agent. Nitrogen varied greatly in single rainfalls. Ammonia was normally more concentrated than nitrate; both fell in sufficient quantitites to enrich surface waters. Atmospheric N loading may stimulate algal production. Rainwater phosphorus was normally less than 40 µg/l and insignificant in contrast to cultural influences. Calculations of rainfall nutrient contributions are given.
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Brakke, D.F. Rainwater: Nutrient additions to a hypereutrophic lake. Hydrobiologia 52, 159–163 (1977). https://doi.org/10.1007/BF00036438
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DOI: https://doi.org/10.1007/BF00036438