Learn the key factors to reduce potable water use for irrigation in LEED certification. Discover how native species, pervious areas, green roofs and pavement impact water conservation.
Table of Contents
Question
To reduce the use of potable water for irrigation, which of the following factors should be taken into consideration?
A. Minimize pervious areas
B. Minimize green roof area
C. Maximize use of native species
D. Maximize use of pervious pavement
Answer
To reduce the use of potable water for irrigation in LEED projects, the most important factor to consider is:
C. Maximize use of native species
Explanation
Native species are plants that are adapted to the local climate and soil conditions, and therefore require less water and maintenance than non-native species. By maximizing the use of native species in the landscaping design, the project can reduce the need for potable water for irrigation and achieve the Outdoor Water Use Reduction credit under LEED v4 Water Efficiency category.
Using native plant species is one of the most effective strategies for reducing potable water consumption for irrigation in LEED projects. Native plants are well-adapted to the local climate, soil, and rainfall patterns, requiring less supplemental irrigation compared to non-native species. By maximizing the use of native plants in landscaping, projects can significantly decrease their reliance on potable water for irrigation.
The other options are less effective or even counterproductive:
A. Minimizing pervious areas would increase runoff and reduce natural groundwater recharge, potentially increasing the need for irrigation.
B. Minimizing green roof area would reduce the benefits of green roofs, such as stormwater retention and reduced urban heat island effect, which can help decrease irrigation requirements.
D. Maximizing the use of pervious pavement can help with stormwater management but does not directly impact the need for irrigation in landscaped areas.
In summary, maximizing the use of native species is the most important factor among the given options for reducing potable water use for irrigation in LEED projects.
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