底  質

bed load (底質)

beach sand(灘砂)

mean diameter (mean grain size,平均徑粒)

median grain size (中央粒徑)

mixed grain size(混合粒徑)

mud (bottom mud,底泥 )

mud flat(泥灘)

grain size (particle diameter, 粒徑)

grain size accumulation curve (粒徑累積曲線，粒徑分佈)

grain size Reynolds number (粒子Reynolds數)

sea gravel(海砂礫)

sea sand(海砂)

sorting (篩選)

sorting coefficient (篩檢係數)