Final answer:
The WEp Outdoor Water Use Reduction refers to an Engineering standard for sustainability in landscape irrigation, which targets a specific percentage reduction in water usage compared to a baseline, especially during peak watering months.
Step-by-step explanation:
The topic of water use reduction for operations, particularly in the field of landscape irrigation and design, can often be associated with Engineering standards and certification systems like LEED (Leadership in Energy and Environmental Design). The question refers to the WEp (Water Efficiency prerequisite) Outdoor Water Use Reduction, which is a part of such certification systems. This guideline sets specific targets for reducing water consumption to promote sustainability and efficient use of resources.
Reduction in water use is typically measured against a set baseline, which represents the norm or average usage for a given situation or context. In the case of the WEp Outdoor Water Use Reduction, the goal is to reduce irrigation requirements by a certain percentage against this established baseline, particularly during the peak watering month, when water use is typically at its highest.
The specified percentages, such as 'more than 40%', 'from 40% to 20%', 'from 20% to 10%', and 'less than 10%', likely refer to different levels of water withdrawal as a percentage of the total available water, giving a framework for understanding water scarcity and the urgency of reducing consumption. However, the exact percentage reduction required by the WEp Outdoor Water Use Reduction prerequisite is not provided in the information. Typically, these requirements demand substantial cuts in usage to promote conservation initiatives.