Halocline Coastal Scenario Map Live Stage 1 model layers over a real South Florida basemap
Baseline scenario

Biscayne Coastal Scenario Area

Open basemap · 37 x 21 model grid
OpenFreeMap basemap with USGS/SFWMD reference layers and real-domain simplified Stage 1 model overlays.
Head: 0.00 to 10.18 m Interface: 0.00 to 60.00 m

Stage 1 scenario brief

Halocline Stage 1 Scenario Brief

Baseline

Baseline Stage 1 conditions

No scenario changes are applied yet. Outputs reflect current placeholder pumping, recharge, sea level, canal stages, and Stage 1 default tuning.

Use the scenario controls to compare a modified run against this baseline.

Before / After

Highest-risk well Central Dade placeholder wellfield · Low risk -> Central Dade placeholder wellfield · Low risk

Uses the current highest-risk well and its baseline-to-current risk class.

Worsened wells 0 -> 0

Counts wells that moved to a higher risk class.

Max drawdown 0.00 m -> 0.00 m

Largest modeled head decline relative to baseline.

Largest interface decrease 0.00 m -> 0.00 m

Largest shallowing of the estimated freshwater-saltwater interface.

Warnings 0 -> 1

Plausibility flags from the Stage 1 solver and tuning checks.

Well Priority

1. Central Dade placeholder wellfield Low risk · unchanged Ratio 0.035 · Head 0.00 m · Interface 0.00 m

Central Dade placeholder wellfield is unchanged in risk class; keep it as context while reviewing higher-priority wells.

2. North Dade placeholder wellfield Low risk · unchanged Ratio 0.034 · Head 0.00 m · Interface 0.00 m

North Dade placeholder wellfield is unchanged in risk class; keep it as context while reviewing higher-priority wells.

3. South Dade placeholder wellfield Low risk · unchanged Ratio 0.023 · Head 0.00 m · Interface 0.00 m

South Dade placeholder wellfield is unchanged in risk class; keep it as context while reviewing higher-priority wells.

Calibration-Lite Readout

Active head range 0.00 to 10.18 m
Interface-depth range 0.00 to 60.00 m
Max drawdown 0.00 m
Highest-risk well Central Dade placeholder wellfield · Low risk
Warnings 1

Model Assumptions

Initial head: 0.60 m

Starting freshwater head used by the solver before it relaxes toward fixed boundaries, recharge, pumping, and canal support.

Regional gradient: 0.025 m/km

Adds inland fixed-head support so the simplified grid starts with a land-to-coast freshwater slope.

Base recharge: 1,300 mm/yr

Sets the background recharge source term before the scenario recharge multiplier is applied.

Hydraulic K scale: 1.00x

Scales provisional hydraulic conductivity bands; lower values usually make pumping drawdown more concentrated.

Default canal stage: 0.55 m

Sets the fallback fixed head for modeled canal cells unless a selected canal has its own override.

Why This Changed

  • Baseline run: outputs reflect current placeholder pumping, recharge, sea level, canal stages, and Stage 1 default tuning.

Warnings

caution

358 active cells exceeded the provisional 60 m aquifer-base guardrail; interface depths were capped for Stage 1 display.

Scenario Summary

No wells exceed the simplified upconing threshold. 0 wells worsened relative to baseline. Solver converged in 81 iterations.

This printable brief is a simplified Stage 1 scenario readout. It is not calibrated, not regulatory, and not a substitute for a reviewed groundwater model.