Reports

Report Number: 39
Year: 1983
 

The WERI Well on Truk: a Solar Photovoltaic Pumping Project

No abstract was published. A summary of the Introduction and Results follows.

Traditional methods of water supply in Truk State often do not provide water of adequate quality or sufficient quantity. The result is an inconvenience for the local people compounded by increased consumption of water of low quality. During 1982, a cholera epidemic swept Truk State, emphasizing the need for safe, potable water supplies. As a result, funds became available from the U.S.A to assist with the following projects:

  • construction of water-sealed toilets;
  • construction of ferro-cement rainwater storage tanks; and
  • construction of shallow, solar-powered wells

This report describes portions of the third project, construction of shallow wells powered by photovoltaic cells.

Wells were sited based on the following criteria:

  • limited or no public utilities
  • flat, sandy coastal area so well depth does not exceed capability of pump
  • open area to allow sunlight collection
  • government property, close to a village, to avoid land disputes
  • distance from privies and tar patches to avoid contamination

The wells are designed to operate during peak daylight hours (9 am to 3 pm, approximately). The only maintenance required is rinsing the surface of the solar panels. Twenty wells were installed and, as of the writing of this report, were functioning according to design specifications. Over 100 wells are planned for Truk. Serious consideration should be given to other islands based on the success of this project, following a groundwater assessment, of course. More information is available in WERI Technical Report No. 49 by Winters and Watters, 1984.

Author(s):
Larry D. McCleary
Robert D. Watters