Am I correct in thinking that the main way a pond dries up is because of the following:

Insufficient Rainfall/Drought, Poor Sandy Soil conditions which lead to loss of water through leakage.

There are basically two ways to create the pond, right?

Dam the area to create a bowl.

or

Excavate to create a bowl.

And if I do both it will be much deeper.

Thanks for your help...this site Rocks!!
Pond Warrior