There are three main ways to dig for water…
Dug wells are constructed below the groundwater table using a shovel. They are generally deepened until the digger finds water is filling the hole faster than they can bail it out. It is then lined with hard material to support it.
A driven well is smaller in diameter and built by assembling thin lengths of steel pipe. Each section – a couple of metres long – is screwed together and driven into the ground up to a depth of around nine metres.
A drilled well is a hole bored into the ground. A lined casing is installed around the upper part of the well to prevent collapse and to stop surface or subsurface contaminants from entering the water supply.