Source, Movement, and Effects of Nitrogen and Phosphorus in Three Ponds in the Headwaters of Hop Brook, Marlborough, Massachusetts

U.S. Geological Survey, Water Resources Investigations Report 84-4017

John C. Briggs, William D. Silvey

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Sections available in pdf:

Section 1 -- 2.11 MB



Purpose and scope


Description of the study area

Methods of study




Organic nitrogen

Ammonia nitrogen

Nitrite nitrogen

Nitrate nitrogen

Total nitrogen


Orthophosphate phosphorus

Total phosphorus

Section 2 -- 1.74 MB

Biological characteristics


Algal growth potential

Alternatives for water quality in the pond system


Section 3 -- 1.55 MB





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