What is the difference between "direct diversion" and "storage" of water in Arizona?

The distinction between "direct diversion" and "storage" of water is key in understanding Arizona's water law. Direct diversion refers to the process of taking water from its source (such as a river or stream) for immediate use, such as irrigation, industrial processes, or municipal supply. This method allows users to utilize water as it flows, making it readily available for current needs.

On the other hand, storage involves collecting and holding water in a reservoir, lake, or other holding facility to be used at a later time, when demand arises or when conditions are more favorable. This can be essential for water management, especially in arid regions like Arizona, where timing and availability of water can be highly variable due to seasonal changes and drought conditions.

This fundamental difference underscores the varying approaches to water rights and usage in state law, particularly in a state that relies heavily on both methods to sustain its water supply. Thus, recognizing that direct diversion is primarily for immediate utilization while storage serves as a means of future availability is crucial for understanding Arizona's legal framework for water rights.