Option G1 (Reach 2 & 3)

Stopbank retreat on Environment Canterbury-owned land

This option proposes building a new stopbank on Environment Canterbury-owned land on the north side of the river and, once established, lowering or removing sections of the existing stopbank.

For both Option G1 and Option G2, new flood protection vegetation would be planted and allowed to establish before the existing stopbank is lowered or removed. 

Option G1: Stopbank retreat on Environment Canterbury  

Pros

• Increases flood-carrying capacity in this section.
• Reduces constriction created by the existing stopbank alignment.
• Primarily uses Environment Canterbury-owned land.

Cons

• Will take time for new flood protection vegetation to establish.
• Addresses capacity issues over a relatively short section of the scheme (1.2 km).

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