放射性同位素示踪技术是探测泥沙运动的一种有效方法。1973年IAEA发表过泥沙输移示踪技术的专辑

[1]

。至今已有三十多个国家使用放射性示踪沙研究河流、河口和沿岸的浮泥、泥沙和卵石的运动

[2]

。在室内试验方面，英国、波兰、法国都进行示踪沙的研究工作

[3~5]

。

This paper presents a method for preparing labelled sand by pouring

113m

In eluate over treated sand sample

dripping some sodium hydroxide solution into it

stiring throughly under optimum condition of the solution (pH=7 as indicated by our experiments) so as to make

113m

In (OH)

3

adsorbed on sand grain surface and finally obtaining

113m

In labelled sand for experimental use through decanting waste solution. The labelling efficiency is in the range of 67-99%

the specific activity 200-1300

μ

Ci/g and the dismantling efficiency less than 5%.