摘要：为扩大激光粒度仪在水文领域特别是水文测验悬移质颗粒级配测定中的应用,根据激光粒度仪和传统的悬移质颗粒级配测定方法的基本原理,对激光粒度仪的分辨率或适用的粒径级差范围进行了研究,得出了激光粒度仪的分辨率或适用的粒径级差数,即采用国际上通用的Φ分级法对泥沙进行分级,激光粒度仪的分辨率或适用的粒径级差为4(△φ=4)级。

关键词： 水文测验；泥沙颗粒分析；粒径级差

Abstract: In order to expand the application of the laser granulometer in hydrology, especially in the suspended sediment grain size analysis, based on the basal principle of the laser granulometer and the traditional way of the suspended sediment grain size analysis, the resolution and the scope of applied grainsize grading of the laser granulometer were studied. It was concluded that using the international current  Φgrading method to grade the sediment, the resolution and the scope of applied grain-size of the laser granulometer is 4("△φ"=4). 

Keywords: hydrometry; sediment grain size analysis; the scope of grain size grading