What is a 'water budget' for landscapes?

• A. A fixed city-wide daily water allotment.
• B. A target annual water allocation per landscape area to meet climate and plant needs while avoiding waste.
• C. The maximum allowed irrigation during drought.
• D. A plan to eliminate irrigation entirely.

Answer: (B)

A water budget for landscapes is a planning approach that estimates how much water a landscape needs over a year by considering the local climate, soil properties, and plant water use, and it sets a target annual allocation to meet those needs while preventing waste. This means accounting for how much rainfall adds to available soil water, how much water is lost through evaporation and plant transpiration, and how much soil storage can hold between irrigation events. By translating those factors into a yearly or seasonal target, you can design irrigation schedules, choose appropriate plantings, and adjust controller settings to meet actual conditions without overwatering. This concept helps ensure that water use aligns with what the landscape truly requires, reducing waste and promoting efficiency even as weather patterns change. The other options don’t fit because a fixed city-wide daily allotment ignores landscape variability, a drought-time maximum is a policy constraint rather than a planning tool, and eliminating irrigation entirely would not reflect the real needs of most landscapes.