Water is very important in an arid area. Those who planned the palaces took great care not to waste water. Rainwater is very precious and has always been conserved and collected, explaining why so many water bodies were constructed. Water management is, in fact, one of the underlying concepts, the linking agent behind the overall planning. There was a unique and extensive system of redistribution, of running water through aqueducts, channels, basins, fountains and tanks before it was finally used for gardening purposes.