Final answer:
In LEED certification for the WEp Outdoor Water Use Reduction prerequisite, hardscapes and unvegetated softscapes are not included in the water use reduction calculations. These areas typically do not require irrigation and therefore do not contribute to outdoor water use that LEED aims to minimize.
Step-by-step explanation:
The student's question pertains to the Water Efficiency (WE) category, specifically the Outdoor Water Use Reduction credit, within the Leadership in Energy and Environmental Design (LEED) certification system for buildings. The question is about whether hardscapes and unvegetated softscapes are included in the water use reduction calculations.
For WEp Outdoor Water Use Reduction, hardscapes and unvegetated softscapes are not included in the calculations. This LEED prerequisite focuses on reducing water consumption through strategic landscaping and irrigation design. LEED measures outdoor water use by evaluating elements such as plant species, irrigation efficiency, and use of non-potable water. The intent is to minimize the need for irrigation and promote water conservation. Hardscapes like paved areas and unvegetated softscapes, which generally do not require irrigation, are excluded from the calculations as they do not contribute to the building's landscaping water demand.
It is important to understand the scope of LEED calculations and requirements when aiming for certification, as targeting specific credits can significantly improve a building's performance and environmental impact. Outdoor water use reduction is just one aspect of achieving greater sustainability through LEED certification.