Terms related to Surface water | Yield | Safe Yield | Draft

Friday, March 9, 2012 16:50
Posted in category Environmental Engineering 1
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Yield :

It may be defined as

The portion of precipitation on a water shed that can be collected for use is called yield.

It includes direct run off and that water which passes underground before appearing as stream flow.

Safe yield :

It is the amount of water that can be drawn throughout the year.

It is the minimum yield that can be recorded for a given past period.

Draft  (Demand) :

It is the actual or intended quantity of water drawn for use.

In the water supply projects, the minimum daily flow of stream should be well above the maximum daily draft.

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