Next important thing that comes is mapping of fresh water sources as shown above, by mapping not only water presence but the purity of water through hyper spectral image analysis. Mapping the extent of pure sources of water along with their extent around the community can give the government or the NGOs access to develop infrastructure.
Countries which are designated as water scarce by international bodies do have substantial ground water resources. Satellite imagery can help identify the ground water reserves and display on Geospatial map. This data can be utilised by the civic bodies to construct wells or other structures for ground water utilisation as potable water.
Mapping of algal blooms which are essentially growth of algae on water bodies which leads to a dead water body and causes water to be unpotable.