Implementation of Nowicki_Jessee_2018

[disotiri1]

Hello everyone!

I am trying to implement the Nowicki_Jessee_2018 model to predict the probability of landslide occurence and spatial extent through openquake v 3.23 (I already read the chat regarding the slope units). I understand that the implementation in openquake is based on the USGS implementation which has some differences with respect to the original paper. 

At the same time, I implement the same model in QGIS, through the raster calculation and by hand, as well. The probabilities computed from Openquake are quite low compared to both QGIS and hand calculations. I matched exactly the openquake result when the landcover coefficient is set to -1.08. However, my input landcover category was 100 and a cofficient of 1.5 should have been considered. 

Could there be a bug in the source code which alwats considers the landcover coefficient equal to -1.08?