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HydroPol2D

A distributed hydrologic-hydrodynamic modeling framework for coupled surface-subsurface processes

Hydrologic Processes

Interception, evapotranspiration, snow dynamics, infiltration, layered vadose storage, recharge, and groundwater feedbacks.

Hydrodynamic Routing

Local inertial, full momentum, diffusive D4, kinematic D4, cellular automata, and hydraulic controls.

Groundwater Model

Layered recharge, capillary rise, async groundwater scheduling, Boussinesq flow, exfiltration, and saturation excess.

Risk Diagnostics

Human-instability modes 1 and 3 coupled to routed depths and velocities, with explicit validation caveats for diagnostics.

Water Quality

Pollutant buildup, washoff, and distributed transport coupled to surface flow and outlet export.

Integrated process architecture

Model Workflow

HydroPol2D links atmospheric forcing, canopy interception, vadose-zone storage, groundwater response, dynamic surface routing, pollutant transport, and optional human-instability diagnostics through two-way coupling across the full hydrologic system.

Atmospheric Forcing

Climate inputs and cryosphere partitioning

Precipitation forcing
Snow partition
Snowmelt contribution

Canopy & Energy Balance

Vegetation controls on effective water input

Interception storage
Throughfall / effective rainfall
Canopy evaporation and ET losses

Coupled Core Solver

Exchanges water mass, storage states, and feedbacks across surface, vadose, groundwater, routing, and quality modules.

Surface-Flow Routing

2D surface storage, conveyance, and controls

Surface storage and routing
Local inertial / full momentum / D4 / CA
Reservoirs, BCs, and outlet controls

Surface & Vadose Partitioning

Runoff generation and subsurface allocation

Weighted Darcy infiltration capacity
Layered vadose storage dynamics
Recharge to groundwater
Infiltration excess to surface water depth

Groundwater System

Subsurface storage and return-flow interaction

Async scheduler and capillary rise
2D Boussinesq groundwater flow
Exfiltration to the surface
Saturation-excess return flow
Feedback to ponded surface depth

Water-Quality Transport

Constituent generation and surface export

Pollutant buildup
Washoff initiation
Advection with surface routing
Transport and outlet export
Atmosphere
Land surface forcing
Partitioning across runoff, storage, and recharge
Subsurface feedback to surface hydraulics
Routing-driven constituent export

Why HydroPol2D?

A modular, high-performance framework for integrated flood, hydrology, groundwater, and water-quality simulation.

HydroPol2D visual

Integrated hydrology and hydraulics

Simulate rainfall-runoff generation, layered vadose storage, groundwater feedback, and five routing families in one framework.

Built for large domains

Designed for efficient high-resolution simulations with scalable workflows and advanced numerical options.

Geospatial workflows

Integrates terrain, soil, vegetation, climate, river, and hydraulic-control datasets into a distributed modeling environment.

Open-Source

Flexible for flood inundation, groundwater interaction, green infrastructure, and water-quality applications.