Inter-tidal Sediment

Inter-tidal sediments are collected on a quarterly basis at three areas along the coast of Hong Kong, namely Pak Sha Wan, Tsim Bei Tsui and Sha Tau Kok. Two layers are taken at each sampling point, the upper layer from the surface to 15 cm deep and the lower layer from 15 to 30 cm in depth. Measurements of the radioactivity of these samples are carried out at the Radiation Laboratory at King's Park.