By choosing 'Surface water, all surface - still and streaming - water technologies are offered in the Knowledge Base. These include
In general, surface water exploitation is cheaper and more commonly applied than groundwater or rainwater harvesting technologies. Surface water bodies are more susceptible to anthropogenic contaminations than other water sources.
WHO Monograph Series, Wagner and Lanoix (p34-35) on water source prioritisation: WATER SUPPLY FOR RURAL AREAS AND SMALL COMMUNITIES