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前言目前水文泥沙测验中通常采用的“取样称重法”是比较落后的,它费时费力。近年来,国内虽开展了利用放射性同位素测量水流含沙量的研究工作,但比较适用于高,中含沙量、在非汛期含沙量很小时或本来含沙量就小的河流就不适用了。为了改变这一状况,清华大学水利系和长江流域规划办公室水文处协作,于1976年开始,在清华大学原有的放射性同位素
Foreword At present, the “Sampling Weighing Method” commonly used in hydrological and sediment tests is relatively backward. It takes time and effort. In recent years, although the research on the determination of sediment concentration by radioisotopes has been carried out in China, it is more suitable for high and medium sediment concentrations. It is not applicable when the sediment concentration in the non-flood season is very small or the sediment concentration is small It’s In order to change this situation, the Department of Water Resources of Tsinghua University and the hydrological office of the Yangtze River Basin Planning Office collaborated. Since 1976, Tsinghua University’s original radioisotope