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Nutrient load
The largest loads of nutrient elements in the
Daugava basin originate as transboundary pollution. In 2000,
transboundary pollution contributed 73% of the total nitrogen
discharge to the sea.
Similarly for phosphorus, the largest loads to the
Daugava basin are from transboundary pollution. In 2000, the river
discharge of phosphorus originating as transboundary pollution was
73% of the total discharge. The transboundary loads of phosphorus
have slightly increased in recent years.
Nutrient concentrations
The mean yearly total nitrogen concentration in
the Daugava River near the Latvian border has decreased, and in
2000 was 1.56 mg/l.
The mean yearly total phosphorus concentration in
the Daugava River has been relatively stable, and was 0.063 mg/l
in 2000
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