Theory Na-emekarị, urughuru size analysis na-enye oke nke grains nke dị iche iche diameters; Enwere ike ime nyocha a site na sieving ma ọ bụ site na sedimentation na mmiri na ntinye nke iwu Stokes.
Dabere na nha na ọnụ ọgụgụ nke ọka ndị na-emepụta mkpokọta, a na-akpọ nchịkọta ahụ nchara, ájá, gravel ma ọ bụ okwute. Agbanyeghị, maka mkpokọta enyerela aka, ọka niile mejupụtara ya enweghị otu akụkụ.
Iji mee nke a, a na-ekewa ọka ndị ahụ n'usoro nke sieves akwụ.
