Paris Convention. Annual report on direct and riverine inputs to Norwegian coastal waters during the year 1996. A. Principles, results and discussion. B. Data report

摘要

This report discusses the inputs of nutrients, heavy metals and persistent organic pollutants to Norwegian coastal waters from 10 main rivers and 145 tributaries during 1996. In addition, the input from rivers not monitored and the direct discharges to marine waters along the coast from Sweden to Russia is estimated. It is found that land-based sources contribute 3400 tonnes of phosphorus and 90000 tonnes of nitrogen per year; 34% of the phosphorus and 54% of the nitrogen come from the monitored rivers and tributaries. The inputs of heavy metals are low, especially for cadmium, lead and mercury. Most values of the different congeners of polychlorinated biphenyl (PCB) are below the detection limit. Small amounts of the pesticide lindane are found in most analyses. The largest yields from heavy metals comprise copper and zinc, 289 and 1002 tonnes, respectively. Retention in the fjords is not included in the above mentioned values. The study is part of a joint monitoring programme under the ''Paris Convention for the prevention of Marine Pollution from Landbased Sources''. 96 refs., 14 figs., 54 tabs.