Tributary and Point Source Total Phosphorus Loading to Lake Erie
1987; Elsevier BV; Volume: 13; Issue: 4 Linguagem: Inglês
10.1016/s0380-1330(87)71680-3
ISSN2773-0719
Autores Tópico(s)Fish Ecology and Management Studies
ResumoTotal phosphorus data from tributaries, municipal and industrial sources, connecting channels, and atmospheric deposition have been evaluated to estimate the loading of phosphorus to Lake Erie. The annual total load from these sources has declined over the study period from a high of 27,944 tonnes in 1968 to a low of 10,452 tonnes in 1981. Of all sources the Detroit River represented the single largest component of the total load. Reductions in the Detroit River annual load, which is a complement of both U.S. and Canadian loads, from 17,822 tonnes to 3,541 tonnes was principally responsible for the overall total phosphorus loading decrease. These decreases were attributed principally to the phosphorus abatement program on municipal sources and the restriction of phosphate concentrations in detergents. In 1978 the contribution to the total load from tributary sources for the first time exceeded the load of phosphorus from the Detroit River, with U.S. tributary sources representing approximately 47 percent of the total lake load.
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