SURFACE WATER SOURCE

A surface water source includes all tributary streams and rivers, natural lakes and artificial reservoirs or impound.

1. Quantity

The quantity of water at the source shall be:

• adequate to supply the water demand of the town or city.

• reasonable surplus for anticipated growth over a design period of 20 to 30 years.

• adequate to compensate for all losses.

• evaluated for its dependability during drought.

• evaluated for impacts on downstream uses due to abstraction for the project.

2. Quality

A sanitary survey and study should be made of factors, both natural and man made, which will affect quality. such survey and study shall include, but shall not be limited to:

• obtaining samples over a sufficient period of times to assess the biological, physical, chemical and radiological characteristics of the water.

• assessing degree of hazard to the supply from upstream discharges and by accidental spillage of materials that may be toxic, harmful or detrimental to treatment process.