Tree Pits and Rain Gardens
Both Tree Pits, Rain Gardens and Swales aid in the management of storm water run off, providing a way to remove pollutants before the water enters the waterways. Usually, Tree Pits and Rain Gardens are situated adjacent to roads or walkways. In addition to cleaning the water, Tree Pits and Rain Gardens also provide irrigation for trees and plants, reducing or eliminating the need for manual watering. Swales are similar to Rain Gardens but are used in steeper locations, where they tend to slow the flow of water with different devises filtering the water before it enters the storm water system.
In order to survive an urban environment, trees need the right conditions to thrive into and beyond maturity. Trees have become an integral part of any modern Streetscape and modern cities plan with mature and sometimes large trees in mind. Provision has to be made for trees to succeed and prosper, below ground, at the surface and above ground.
Trees not only provide above the ground visual appeal but, installed correctly, tree pits collect stormwater runoff from paved areas or roads avoiding these pollutants from entering piped stormwater systems.
The Auckland Council, for instance has strict guidelines on how tree pits are to be designed, constructed and maintained. Evergreen Landcare has built numerous tree pits as part of our Streetscape services.
Street Tree Planting