THE APPLICATIONS OF THE NATURAL RADIOTRACERS V.A~(210)Pb STUDY OF TRANSPORTATION OF THE SILTS ENTERING THE SEA FROM THE JIULONG RIVER AND THEIR EFFECT ON THE MAIN CHANNEL IN XIAMEN HARBOUR

By determining the horizontal distribution of ~(210)Pb in sediments of Xiamen Sea Area, it is understood that most silts from the Jiulong River move to the outsea along the main current direction of the Jiulong River through the outside Xiamen Harbour. Only a few of the silts enter West Xiamen Harbour (i. e. the main channel) with the rising tide and residual current The great part of the silts stops in the west-section of the West Xiamen Harbour, without entering the east-section of the West Xiamen Harbour, thus affecting the channel of west-section, but not the channel of east secton. This results agree with that obtained by other method(i.e. method of ~(226)Ra tracer).