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 Green
Building
Requirements
Guidelines
 Introduction
Siting
and Form
Landscape
Landscape
Introduction
Reqd/Suggested
Practices
Minimize
Stormwater Runoff
 Water-efficient
Irrigation
Use
of Water Features
Shade
Buildings
Enhance
Building Ventilation
Environmental
Landscaping
Urban
Agriculture/Gardens
Shelter
& Habitat for Wildlife
Recycled
Materials
Transportation
Envelope
and Space Planning
Materials
Water
Systems
Electrical
Systems
HVAC
Systems
Control
Systems
Construction
Management
Commissioning
Appendices
Case Studies
Additional Resources
Site
Map
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Water
Efficient Irrigation
Appropriate planting
and efficient irrigation systems can reduce irrigation water
use by 50% to 70% and overall water consumption by up to 25%.
- Group plants
with similar water requirements on common zones to match precipitation
heads and emitters.
- Use drip irrigation
for trees, shrub beds and areas of groundcover to eliminate evaporation
losses.
- Choose low-volume,
low-angle sprinklers for lawn areas.
- Select heads
that fit the size and shape of the areas to be watered.
- Program automatic
controllers for night irrigation to reduce losses due to evaporation
and wind drift.
- Select controllers
with adjustable watering schedules and moisture sensors to account
for seasonal variations, and calibrate them during commissioning.
- Where possible,
use graywater for irrigation. Use barrels at the bottom of rainwater
leaders for manual irrigation of trees and shrubs.
- Place 3 to
5 in. of mulch on planting beds each spring to minimize evaporation.
Cautions
- Ensure compost
and mulch are regularly added to soil to enhance moisture retention.
- Limit lawn areas
and select appropriate plants for site and climatic conditions.
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