ABSTRACT
The water from rainfall collected in lakes, ponds, and rivers etc. is called surface water. It may be either flowing or still. The public has various uses for surface water, such as.
• Drinking • Bathing and recreational activities like swimming, skiing, boating, etc. • Commercial fish farming • Recreational fishing • Irrigation
Surface water has the unique quality of self-purification, which means the exchange of gases (O2-CO2 system) in the environment. This property causes the oxidation of natural or foreign organic pollutants by oxygen dissolved in waters. In oxygenrich zones, degradable organic substances are broken down into simpler unobjectionable products by the action of aerobic microorganisms.
