The generic hazard on landuse classes Impact Function allows you to perform an impact assessment using a vector polygon hazard layer (e.g. generic hazard classes of high, medium, low) and a polygon exposure layer (where each polygon represents a landuse class such as urban are, croplands etc.).
Further reading: https://github.com/inasafe/inasafe/issues/1216
This feature was funded by DFAT/DMInnovation