SIMULATOR · PUBLIC WORKING VERSION · v0.1.1
A small catchment,
several futures
Compare what happens locally, later and downstream.
An intervention can change what happens locally, later and downstream. Explore those differences in Wattle Bend, a constructed catchment with two simplified models.
The catchment and index values are constructed examples. This working version cannot predict environmental outcomes or support land-management decisions. It demonstrates an interface and its limits.
A FOUR-STEP WALKTHROUGH
Look beyond the first view
Start with a greener creek corridor, move through time, widen the view and reach a deliberate refusal.
Choose a scenario
These broad labels select illustrative rules. They do not specify a real intervention, its engineering or a real weather sequence.
WATTLE BEND · A PRACTICE CATCHMENT
The visible landscape
The footprint is smaller than the consequence domain
The purple boundary includes a downstream receptor and a delayed below-ground pathway. The hatched area marks an omitted sediment process. This is a teaching diagram: the boundary is drawn by us, and cannot establish that all consequences have been captured.
A greener corridor does not establish that the wider system benefits. Moving the horizon and showing another layer can change the question.
ILLUSTRATIVE CONSEQUENCE ENVELOPE
What travels with the result
ILLUSTRATIVE COMPARISON
Later and further away
What remains unknown
Sediment, ecological change, extreme-event behaviour, cumulative interventions and real receptors are not represented. There is no measured baseline, calibration or validation.
Who may decide
This page has no authority over real land or Country. Real work would require legitimate local decision processes, permissions and appropriate Traditional Owner governance before data or knowledge is used.
Compare with no new action
Illustrative indices, from 0 to 100. Each row uses its own arbitrary scale, so values cannot be compared across rows. Differences follow the model’s rules and do not represent measured effects.
| Illustrative index | Selected action Model A | Selected action Model B | No new action Model A | No new action Model B |
|---|
No new action is a separate conditional scenario. It is not a claim that a real catchment stays unchanged.
Two assumptions, different trajectories
Both models use the same illustrative rule family and starting values. Model B assigns a stronger connection and a shorter delay to the below-ground pathway. Their agreement would not establish independent evidence. Their differences are not probabilities.
━━ Model A ┄┄ Model B
Read all trajectory values
| Horizon | Model A | Model B |
|---|
Inspect the workings
Inspect how this result was calculated
The current selections and both models' illustrative intermediate values are shown below. A displayed number does not turn an assumption into an observation.
What real evidence would be needed?
- A coherent, dated baseline with provenance, coverage, measurement uncertainty and permissions.
- Catchment boundaries, downstream receptors and groundwater connections supported by observations.
- Process models tested for the intended place, timescale and use, with their shared ancestry recorded.
- Explicit intervention geometry, engineering, maintenance, failure conditions and alternatives.
- Checks on transformations, conservation and uncertainty when models exchange information.
- Local authority and appropriate Traditional Owner governance, including what must remain restricted.
- Monitoring that can challenge the result, plus clear expiry and refusal conditions.
This list describes work still needed. No evidence has been collected or scientific review completed for this example.
See the model rule sheet
The complete deterministic rules are shown below. Every coefficient is chosen for this example. The two models share these formulas, so they are related by design. Nothing here is a scientific estimate.
All results are rounded and clipped to 0 through 100. That clipping is an interface convenience. It is not a physical conservation rule or a validation check.
Where could your expertise enter?
Choose an area to see what would need to replace the illustrative rule. You can prepare an interest note locally, then decide whether and where to share it yourself.
Nothing is sent by this page. It has no contact form, accounts, analytics, cookies or browser storage. Selections and notes are lost when this tab reloads or closes unless you copy or download them. Your host and browser still handle ordinary page requests.