天然放射性示踪剂的应用——Ⅴ.用^(210)Pb示踪研究九龙江泥沙对厦门航道的影响

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

本文通过测定厦门海域沉积物中^(210)Pb的水平分布,研究了九龙江人海泥沙的运动,从而探明大部分九龙江入海泥沙是沿着九龙江水的主流方向输运,经厦门外港,最后进入外海。然而,还有一小部分泥沙随着涨潮和余流进入厦门西港。进入西港的泥沙主要是停留在嵩鼓海峡(即嵩屿与鼓浪屿之间),并对嵩鼓航道产生一定影响,但对厦鼓海峡(即厦门与鼓浪屿之间)的影响则很少。这一结论和我们用^(226)Ra示踪法研究九龙江入海泥沙运动所得到的结果一致。

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) .