Friday, June 26, 2009

Wellhead Protection

A well’s area of water contribution
Comes from an outward reach of distribution
When the well is pumped, it beckons,
For the water to come from all sections.

A pumped well causes a stir in the water table
The disturbed water reacts as it is capable
A pumping cone of depression is developed
And a local circle of water is enveloped.

We can see that a well needs space
To have ample, pure water in every case.
Regulators require a zone of wellhead protection
The site of the well must have careful selection.

Permeable rocks and a high-yielding well
May cause the cone of depression to outward swell.
Under opposite conditions, the cone may be steep
And the cone may not have a great outward leap.

On up-slope parts of the cone in the water table
The natural flow of ground water is able
To enter the cone and contribute
More water for a sustained supply to suit.

So, if the well were able to talk
It would inevitably balk
If the contributing area is much too small
Or if contaminants are in urban sprawl.