{latex}
\large
\[
\begin{gathered}
  \overline G  = \sqrt {\frac{\varepsilon }
{\nu }}  = \sqrt {\frac{{gh}}
{{\nu \theta }}}  = \sqrt {\frac{{ghQ}}
{{\nu \forall }}}  = \sqrt {\frac{{16KQ^3 }}
{{\nu \pi ^3 D^7 }}}  \hfill \\
  D = \left\{ {\frac{{16KQ^3 }}
{{\nu \pi ^3 \overline G ^2 }}} \right\}^{1/7}  \hfill \\
  Q = \left\{ {\frac{{\nu \pi ^3 \overline G ^2 D^7 }}
{{16K}}} \right\}^{1/3}  \hfill \\ 
\end{gathered} 
\]


{latex}