\chapter{Uplift calculation}\label{sec:UpliftCalculation}
\label{sec:UpliftCalculation}

\ProgramName makes calculations to see whether there is any uplift from the inner toe to the centre of the ditch bed. The formula from the VTV (2006) is used for this purpose. 
\begin{equation}
\label{eq_opdrukveiligheid}
	Uplift safety = \frac{\sigma_g}{\sigma_w}
\end{equation}

If there is no ditch present, the calculations will extend to the edge of the cross-section.

The check for uplift is done at every surface line point from DikeToeAtPolder to SurfaceLevelInside (from left to right).

The check for uplift has the following purposes:
\begin{itemize}
	\item To decide if a LiftVan calculation is required, see \autoref{sec:CombinationBishopUpliftVan}.
	\item To generate the piezometric levels, see \autoref{sec:CheckUplift}\newline
\end{itemize}

