This booklet on water technologies gives examples of innovations such as the use of sunlight to purify water, effective low-cost water filters, low-cost drip irrigation and locally produced hand pumps that are five times cheaper than imported pumps.
NWP (2006): Smart Water Solutions. Examples of Innovative, Low-cost Technologies for Wells, Pumps, Storage, Irrigation and Water Treatment. The Hague: Netherlands Water Partnership (NWP) URL [Accessed: 02.04.2012] PDF