You cannot add it to the code since for that you would need a source code. However, you could quite easily use the same algorithm and adjust the input meteo (prec and evap) data.
I do have the same routine in 2D as in 1D, except that it is currently not active. We are considering of making it available in one of the future versions.
A discussion forum for users of the new HYDRUS 2D/3D. HYDRUS is a software package for simulating water, heat and solute movement in two- and three-dimensional variably saturated media. Happy Posting!