What overarching principle does Arizona law not recognize regarding water rights?

In Arizona, the overarching principle regarding water rights that is not recognized is the concept of riparian water rights. Unlike states that adhere to the riparian doctrine, which allocates water rights to those who own land adjacent to a water source, Arizona operates primarily under the doctrine of prior appropriation. This principle allows water rights to be obtained by diverting water for beneficial use, regardless of land ownership adjacent to the water source.

This distinction is crucial in understanding Arizona's unique approach to water management, which is necessary due to the state's arid climate and limited water resources. The prioritization of prior appropriation ensures that the earliest users have first rights to water, which is more suited to regions where water may be scarce. Thus, the absence of recognition for riparian rights aligns with Arizona's legal framework and the need to effectively manage its water resources.