ABSTRACT
The uses for ground water are far more varied than merely for domestic supply or irrigation. Management of water means controlled use in accord with some plan. Most uses of ground water are simple exploitation as a free good, and the water is generally considered to be self-renewing. Israel is an example of a modern industrial-agricultural economy where water is so scarce that total management of ground water and surface water as a unit resource is practised. In general, water managers consider that water is polluted when dissolved or entrained substances are present in amounts that make the water unfit or undesirable for specified uses. Absence of serious pollution of ground water in some places where sources of pollution are widespread is a consequence of the nature of aquifers. The generally slow motion of ground water in granular aquifers is highly important in relation to pollution.
