In Arizona, why is surface water availability variable throughout the year?

The variability of surface water availability throughout the year in Arizona is primarily due to seasonal changes in weather. Arizona experiences distinct dry and wet seasons, influenced by climatic factors such as monsoon rains in the summer and occasional snowmelt in the northern parts of the state during spring. This seasonal precipitation drives river flows and the levels of lakes and reservoirs, resulting in fluctuations in surface water availability.

In contrast, variables such as state regulation have more to do with how water is allocated and managed rather than the inherent availability throughout the year. While industrial consumption may impact the demand for water, it does not significantly influence seasonal supply. Additionally, geographical factors play a crucial role in the state’s water resources; however, seasonal weather patterns are the primary determinants of surface water variability.