Introduction to Hand-Dug Wells

A. Overview

Rural communities have frequently employed hand-dug wells to increase the supply of water available for individual use. Using simple construction techniques and suitable materials, hand-dug wells can provide reliable sources of water and offer the following advantages:

On the other hand, hand-dug wells present certain limitations:

The hand-dug well is the only method of well construction where people actually go into the well to work educational campaign to demonstrate and explain what each part of the well is and how it works might help villagers understand and then want to work with and maintain it more. In so doing, proper maintenance necessary in keeping the well functioning might be better carried out, particularly in communities using a well or an improved water source for the first time.


Figure

For sanitation reasons a pump is desirable. If installed on a hand-dug well with a full cover, a pump will help reduce chances of contamination significantly. In rural areas where pump maintenance and repair can be a real problem, large diameter wells are often the best solution to water supply problems. Pumps can be installed while leaving an accessway through which water can be drawn by rope and bucket if the pump should break down. (See Pumps Appendix).

Compared to other well sinking methods, digging a well by hand takes a long time. An organized and experienced construction team consisting of five workers plus enough people to lower and raise loads in the well can dig and line 1 meter per day in relatively loose soil that does not cave in. However, the bottom section is likely to take 2 or 3 days per meter because of the difficulty in working while water continually enters the well. Depending on how you plan to develop the well, the top section can take anywhere from a day or two to several weeks. An experienced team sinking a 20 meter well and installing pulleys on the top structure could easily take 5 weeks, including occasional days off (this, of course, assumes no major delays). A new or inexperienced group would be expected to take twice that time.

Hand-dug wells should be dug during the dry season when the water table is likely to be at or near its lowest point. The well can be sunk deeper with less interference from water flowing into it. The greater depth should also ensure a year-round supply of water.

If the well cannot be dug during the dry season, plan to go back to it at the end of the dry season to deepen it.

B. Work Outline

Outlined below are the major steps involved in digging a well. The appropriate community leaders, health committee, public works committee, and others who are interested should be involved in all the planning decisions.

  1. you reach water, or

  2. some obstruction causes you to

  1. change digging/lining procedure

  2. abandon this well and pick a new site.

*These items are not always necessary but should be considered.