Wind-electric waterpumping built at village level
Teach village mechanics and entrepreneurs to build small wind turbines that can power a pump

Solution

Teach village mechanics and entrepreneurs how to build an optimized small wind turbine design for wind-electric waterpumping.  The solution is simple and can be locally built with common materials.  The system can double as a battery-charging unit when excess power is available.  A portable system is realizable with proper tower design.