In addition to the original map showing the locations on the Elevation zones background, add two new "Potential Site Locations" maps: one with the "ANNUAL PRECIPITATION DISTRIBUTION" map as the background, the other with the "SUBBASIN ANNUAL PRECIPITATION CONTRIBUTION" as the background. We can keep the same map title for all three maps, but keep (add) the background layer name to the legend. These layers are: Elevation Zones, Precipitation Zones, and Precipitation Contribution.
In addition to the original map showing the locations on the Elevation zones background, add two new "Potential Site Locations" maps: one with the "ANNUAL PRECIPITATION DISTRIBUTION" map as the background, the other with the "SUBBASIN ANNUAL PRECIPITATION CONTRIBUTION" as the background. We can keep the same map title for all three maps, but keep (add) the background layer name to the legend. These layers are: Elevation Zones, Precipitation Zones, and Precipitation Contribution.