What are the main factors for the location of villages in desert regions?

Desert areas are distinguished by lack of water or aridity, hence scanty vegetation which tends to be xerophytic in nature. Major factor for patterns of settlement in the desert is the supply of water. In Rajasthan, there tend to be clustered settlements around the region of oasis as well as other areas of water accessibility. Since these areas are included in the only few areas where water is accessible, therefore, settlement around the source of water tend to become clustered and is the major driving force habitations.