Changes

These are (usually plastic) supporting structures placed around the trees and beneath adjacent paved areas. They prevent compaction to the roots of the tree and prevent root damage to the paving. They are sometimes configured to receive stormwater and to enclose ponded water which can then infiltrate the soil surrounding the tree.  

These are (usually plastic) supporting structures placed around the trees and beneath adjacent paved areas. They prevent compaction to the roots of the tree and prevent root damage to the paving. They are sometimes configured to receive stormwater and to enclose ponded water which can then infiltrate the soil surrounding the tree.  

Things to consider in design:

Things to consider in design:

*If the system is unlined it is hydraulically equivalent to a [[bioretention]] and provides similar water quality benefits.   

*If the system is unlined it is hydraulically equivalent to a [[bioretention]] cell and provides similar water quality benefits.   

*If the systems is lined, it is hydraulically similar to a large [[stormwater planter]]. Depending on the design detail it may retain significant stormwater within the planting volume soil and will provide water quality benefits.   

*If the systems is lined, it is hydraulically similar to a large [[stormwater planter]]. Depending on the design detail it may retain significant stormwater within the planting volume soil and will provide water quality benefits.