关于推移质测验垂线布设和取样历时确定方法的研究

A Study on the Measuring Method of Bed-load Sampling Verticals and Duration

本文通过理论引证、模拟计算、实测资料对比分析,论证了按等部份输沙率分布测验垂线的方法,可使测量误差最小.对测线数目、取样历时、重复取样次数等都作了定量分析.并提出了重复取样次数亦按部份输沙率比例增加的实用原则.这不仅可澄清当今推移质测验方法上的对立观点,而且为测验规范提供了理论依据.

By means of the theoretical analysis, the simulating calculations and the comparative analysis of field data, the method of the distribution of meas- suring verticals across the section according to the equal bed load transport rate has been demonstrated. Such a method can make the measuring errors to the minimun.The qantitative analysis of the number of measuring verticals the msa-pling duration and the required repeating .sampling times have been conducted. And a practical application of the principle that the requiredre-peating sampling times can be determined by the correspondeing bed load transport rate has beenpresented. This method can not only give a clear concpconeept to the existing different viewpoints about the method of the bed load measurement but also provide a base for establishing the standard of measurement.