Which of the following is an example of beneficial use of water?

The correct answer highlights the principle of "beneficial use," which is a foundational concept in water law, especially in Arizona. Beneficial use refers to the utilization of water in a way that supports economic activities, environmental sustainability, or overall public welfare.

Using water for irrigation to support crops exemplifies beneficial use because it directly contributes to agriculture, which is crucial for food production and economic stability. This practice not only ensures that crops receive the necessary hydration to grow but also helps sustain livelihoods and supports the agricultural economy.

While other options involve water usage, they don't meet the criteria for beneficial use under Arizona law. Hoarding water for future use does not actively utilize the water and can lead to wastefulness, whereas storing water in barrels for decoration does not provide any practical benefit. Allowing runoff to gather without use indicates a lack of utilization, which fails to support any beneficial activity. Thus, irrigation for crop support clearly aligns with the ethos of maximizing water resources for productive and advantageous purposes.