Thisstudyis aimed at determining the fate of some heavy metals and hydrocarbons in soils amended with sludge from river cleaning out. Northern France has been chosen for the experiment because it is a heavily industrialized region where contamination by micropollutants has been very acute for many years. Several French laboratories are associated in this joint project which is partly sponsored by the Ministry of Environment and Artois-Picardie Water Agency.

The parcel of land studied has a surface area of 100m2. It has been instrumented with Chamberland candles in order to get water for micropollutants analysis, tensiometers and a neutronic probe so as to collect informations on the hydric state of the soil. Once instrumented the parcel has been spread with sludge from river cleaning out.

The main objective is to obtain an estimation of the fluxes of micropollutants and to evaluate the respective proportions of infiltration and drainage.

A lab study based on lysimeters is carried out together with the field study. The field study will last at least 2 years while the lab study will be going on for a year.

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