CMS-Flow:Incipient Motion

Komar and Miller (1975):

$U_{crc}=\{\begin{array}{ll}0.19(d_{50}{)}^{0.1}\log {}_{10}\left(\frac{4h}{d_{90}}\right),& \text{for }0.1\le d_{50}\le 0.5mm\\ 8.5(d_{50}{)}^{0.6}\log {}_{10}\left(\frac{4h}{d_{90}}\right),& \text{for }0.5\le d_{50}\le 2.0mm\end{array}$

(11)

$U_{crw}=\{\begin{array}{ll}0.24[(s-1)g{]}^{0.66}(d_{50}{)}^{0.33}{T}_p^{0.33},& \text{for }0.1\le d_{50}\le 0.5mm\\ 0.95[(s-1)g{]}^{0.57}(d_{50}{)}^{0.43}{T}_p^{0.14},& \text{for }0.5\le d_{50}\le 2.0mm\end{array}$

(12)