Log-transformations of zero values

[limnoliver]

Currently, the loads are log-transformed, which causes Inf values if loads are 0. Currently, I've been removing these events, but this is not a long-term solution.

Loads probably should be 0, but rather should be calculated with 0.5*DL (or some other acceptable value). Solutions could be:

• calculate loads with 0.5DLrunoff

• Make the loads some small value that's close to zero