define the input to the IM sites of pollutants carried in the precipitation
Measurements are carried out monthly using open bulk collectors, situated in an open area of the site.
For further information see IVL.
The bottle (left) that receives rain water is covered with aluminum
foil in order that light may not promote algal growth and thus
disturb the element balance in the water. The sack to the right
collects snow which is then melted before volume measurement and