Does anybody now how to calculate Infinity Downslope Influence with the TauDEM version?
the command was present until version 3.x but now disappeared I don't know if it was renamed or simply removed.
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Downslope Influence is the same as weighted contributing area with weight values equal to 1 in the influence zone and 0 elsewhere. It can thus be evaluated using TauDEM D-Infinity Contributing Area.
e.g. AreaDinf -ang < angfile > -sca < scafile> -wg , where wgfile is a grid with values of 1 in your influence zone and 0 elsewhere. The result is written to scafile (even though once a weight grid is used, it is no longer specific catchment area).
Given that this is a special case of weighted contributing area, I decided to not carry the burden of maintaining a separately named GUI function, and removed the GUI for Downslope Influence for later versions of TauDEM, that had internally used AreaDinf code.