old wells at ometepe island

antique aquifer area areas background brick bucket chemical color colors construction container containers deep digging drilled drinking dry earth excavation farm freshwater ground groundwater hand health history horizontal hydrologist hydrology island lining manual material mechanically mineral nicaragua old ometepe photography poles potable pulling pump pumped red rivas rocks rope rural scoop sediment shaft shallow soil solutions stone stream structure sunk surveyor things town trees unconfined water watercourse way well wickerwork wood yellow