GAH-3D

Green-Ampt-Hantush 3D Basin Engine

Click the map or enter coordinates

Latitude

Longitude

AEP to analyse

Storm Durations Select / Deselect All

Vertical Hydraulic Conductivity (Kv) [Learn more in the Technical Reference Manual] ⓘ

Horizontal Hyd. Conductivity (Kh) [Optional] ⓘ

Soil Moderation Factor (U) ⓘ

Base Length (m)

Base Width (m)

Side Slope (1:X)

Max Depth (m)

Basin Soil Type Defaults

Advanced Parameter Input

Using soil-type defaults. Switch to "Specify custom values" to edit manually.

Initial Moisture Deficit (Δθ)

Capillary Suction Head (ψ) [m]

Specific Yield (Sy)

Basin Invert Level (m AHD)

Design Groundwater Level (m AHD)

Base Aquifer Level (m AHD)

SSP Scenario

(i) Historical — only to be used for historical assessments

Click the map to set your site location, configure your
catchments and soil parameters, then press Run Analysis.

Critical Event	Duration & Rank	Peak Vol (m³)	Peak Depth (m)	Peak Mound (m)	Exceeds Allowable?	Spilled Vol (m³)

Select Duration:

Analysis of how gradual clogging affects basin drawdown and performance over time.

Analysis Years

Final Clogged K (m/day)

Final Clogged Thickness (m)

AEP	Duration (min)	Temporal Pattern	Peak Flow (m³/s)	Volume (m³)	Time to Peak (min)

Running simulation…

Fetching ARR data & computing runoff