Gradation of sand column and sediment concentration of muddy water and water head are remarkably effective factors for the fine grain distribution in sand column.
砂柱的颗粒组成、水含沙量和入渗水头对滞留分布产生显著的影响。
2
This method is effective, and it has important significance on improving the quality of sieve analysis sand grains gradation.
方法行之有效，对提高筛析泥沙颗粒级配的质量有着重要的意义。
3
Weathered sand has benefits of wide spread, plenty of source and low cost. However it has drawbacks of low strength and unstable gradation.