In this study session, you have learned that:
- Rainwater, surface water (from lakes, rivers, ponds) and groundwater (from springs, wells and boreholes) are the sources of water for public and domestic purposes.
- Groundwater sources are generally preferable to surface water sources. They tend to be safer and less in need of costly water treatment.
- There are number of issues to be considered before the development of a new water source, including assessment of the quantity and quality of the available water, and consideration of the needs and involvement of the community. A thorough sanitary survey is an important part of this process.
- Dug wells, deep wells, bored wells, and driven and jetted wells are some of the methods of groundwater source development.
- Protection of well water and spring water from contaminants and pollutants is very important.
- After construction, or when repairs are made, the spring, well, pump or piping should be disinfected with chlorine solution.
- Sodium or potassium fluorescein is a water-soluble dye that can be used as a tracer when a sewage disposal system is suspected of contamination of groundwater.
- Rainwater harvesting is very important when the quantity or quality of other water sources is inadequate. Rainwater must be stored in a closed tank and kept free of contaminants.
Viimeksi muutettu: tiistai, 24 kesäkuu 2014, 11:55