Decision Workspace
Water and land-use decisions in one place: what the model expects, what it would cost the community, and what was actually decided.
SN5 dissolved copper — observed and forecast
Solid line is measured. Dashed line with the shaded band is the model forecast; the band widens where the model is less certain.
Forecast crossing of the domestic standard: 9–14 months.
Intervention options
Every option is scored against community priority as well as cost and time.
Community priority context
Community-approved aggregate- Water reliability 44%
Zone A — upper terraces
38 households · Continued vegetable farming with soil support
- Water reliability 51%
Zone B — creek flats
31 households · Mixed farming and managed rehabilitation
- Water reliability 58%
Zone C — Bugtong farm belt
34 households · Crop diversification trial preferred
- Suppressed — group too small (n<10)
Zone D — dump margin
8 households · Suppressed — group too small (n<10)
- Suppressed — group too small (n<10)
Zone E — ridge settlement
9 households · Suppressed — group too small (n<10)
Inferences driving this page
The proposed northern diversion improves water quality in the northern catchment but reduces irrigation reliability in a zone where water access is the highest-ranked community priority, so consultation is required before design lock-in.
Recommended action
Convene a community consultation on diversion alignment before committing to detailed design; present all three options with their irrigation consequences.
Owner: Closure Manager with Community Liaison · By: Within 30 days · Advisory only, a named human role decides.
Zone C soils and water indicate suitability for non-accumulating crop varieties; Zone A remains under review pending confirmation sampling.
Recommended action
Publish zone guidance for non-accumulating varieties in Zone C and schedule Zone A confirmation sampling before advising there.
Owner: Agronomy Adviser with Community Liaison · By: Before the next planting window · Advisory only, a named human role decides.
On the current trajectory, SN5 copper concentration meets the domestic water standard within 9–14 months.
Recommended action
Schedule limestone media replenishment ahead of the forecast plateau and re-run the forecast after two further rounds.
Owner: Water Treatment Supervisor · By: 31 January 2027 · Advisory only, a named human role decides.