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The Stormwater Management chapter manages discharges of stormwater: rainwater and meltwater runoff from surfaces such as roofs, driveways, carparks, and roads. Urban areas, with numerous buildings and paved surfaces, face challenges because the water cannot permeate the ground, leading to potential flooding and contamination of the receiving environment – rivers, lakes, and the sea.
The chapter manages discharges from:
These discharges have previously been managed by the Regional Plan: Water for Otago (Water Plan). Plan Change 8 (operative from 9 July 2022) improved the policy direction for stormwater by requiring progressive reduction of sewage overflows in stormwater, and measures to control the quantity and quality of stormwater to reflect current best practice, to contribute towards improving water quality in the Otago Region.
This chapter does not manage stormwater from construction and earthworks, which is managed in the Earthworks chapter.
The table below provides a high-level comparison of the existing Water Plan provisions with those included in the draft Stormwater chapter and highlights the key changes from the Water Plan.
| Stormwater Management chapter of draft LWRP | Existing plan |
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Key changes:
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It is permitted to discharge stormwater from a reticulated system to water, if:
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| Stormwater Management chapter of draft LWRP | Existing plan |
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Key changes:
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It is permitted to discharge stormwater from a road which is not connected to a stormwater system, if:
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