Research profile

Marcus N. Gomes Jr., Ph.D.

Marcus N. Gomes Jr., Ph.D.

Postdoctoral Researcher

Developed Models

Research software 路 open science

I build computational tools to understand how water moves, where floods emerge, and how infrastructure can respond.

The collection spans physically based flood simulation, hillslope hydrology, rainfall extremes, green infrastructure, and real-time control.

  1. 01ObserveRainfall, terrain, soils, flow
  2. 02RepresentProcesses and exchanges
  3. 03SimulateHazards across scales
  4. 04DecideDesign and adaptation

01 / Flagship model

HydroPol2D

A distributed model of the water cycle built for flood science across spatial and temporal scales.

HydroPol2D couples rainfall, infiltration, groundwater exchange, runoff, urban drainage, channels, reservoirs, pollutant transport, snow, land-surface energy balance, and surface flooding in a raster-based framework.

  • Surface and subsurfaceCoupled hydrology
  • Local to regionalSpatially distributed
  • Water and pollutantsHydrodynamic routing
Repository Documentation Journal paper
Stanford campus 路 10 m coupled simulationFlood depth 路 velocity 路 rainfall 路 infiltration 路 groundwater 路 recharge

02 / Software portfolio

Tools across the research workflow

Focused models for river hydraulics, green infrastructure, rainfall extremes, control, and design.

02

Full-momentum 1D hydraulics

HydroHP-1D

Solves the complete one-dimensional Saint-Venant equations across multiple channel geometries and boundary-condition combinations.

Channels 路 tides 路 unsteady flow

Repository
HydroHP-1D unsteady flow simulation showing the evolution of channel states
State evolution in an unsteady-flow simulation.
03

Infiltration-based LID modeling

DRAIN-LID

A mixed-form Richards equation solver for continuous, high-resolution simulation of saturated and unsaturated flow in low-impact development systems.

Soil water 路 infiltration 路 climate adaptation

Repository
DRAIN-LID conceptual framework for infiltration-based systems
Surface-subsurface processes represented by DRAIN-LID.
04

Rainfall extremes and IDF curves

GRIDF-BR

Processes raster rainfall, extracts extremes, corrects satellite bias, and estimates intensity-duration-frequency curves consistently across Brazil.

Earth observation 路 extremes 路 national scale

Web app Code
GRIDF-BR interface and rainfall-extreme outputs
Nationally consistent rainfall-frequency estimation.
05

Control-oriented stormwater modeling

RTC-Stormwater

Represents catchments, channels, and reservoirs in state space to test reactive and predictive control of flood quantity and water quality.

Forecasts 路 reservoirs 路 real-time control

Repository
RTC-Stormwater predictive control framework
Forecast-informed control of distributed storage.
06

Bioretention analysis and design

TC-Hydro

Supports routing, sensitivity analysis, calibration, Monte Carlo simulation, and cost-aware optimization of bioretention systems.

Green infrastructure 路 uncertainty 路 cost

Repository
TC-Hydro conceptual representation of a bioretention system
Hydrologic processes within a bioretention system.

03 / Research code

Additional models and numerical experiments

Compact tools developed for specific questions in terrain preparation, infrastructure design, shallow-water flow, and hillslope hydrology.

07Terrain preparationHydroBathyDEMHydrologic conditioning and bathymetry for model-ready elevation data. 08Distributed storage designLotScaleReservoirLot-scale LID sizing under spatially variable runoff contributions. 09Detention pond designMODOBRHydrologic routing and storage design under clogged outlet conditions.
10Hydraulic networksX-WHATNetwork flow and tank optimization using infrastructure and foundation costs.
11Two-dimensional hydraulicsSWE-SolverA well-balanced conservative shallow-water equations solver. 12Hillslope hydrology1D hsB ModelFinite-volume Hillslope-Storage-Boussinesq simulation of saturated flow.
13Coupled hillslope processesCoupled hsB-SM ModelAtmosphere, soil water, groundwater, baseflow, and surface runoff in development.