Mohid Studio


MOHID Land is a spatially distributed numerical model to simulate all hydrological and hydraulic processes which occur in river basins, including rainfall, infiltration, surface runoff, channel flow and groundwater flow. Additionally the model can be used to simulate the transport of dissolved and particulate matter, microbiological processes (1st order decay) and water quality processes (e.g. phosphorus cycle, nitrogen cycle).

MOHID Land is composed of the following main modules:

  • A 2D module which simulates the surface runoff;
  • A 1D module which simulates the flow in channels of the drainage network;
  • A 3D module which simulates the flow in saturated and non-saturated soil.

These flows are interdependent and its integrated simulation eliminates the need for hypotheses on transfers between those domains. Nevertheless MOHID Land also allows running the above mentioned models alone (or combination of two), replacing the integrated approach by commonly used boundary conditions (e.g. use curve number approach for infiltration rather than running the 3D porous media model).

Engineering Problems which are typically addressed with MOHID Land include:

  • Flood Risk Assessment
  • Dam Break Scenarios
  • Impact of discharges from WWTP
  • Impact of land use changes (e.g. agriculture practices)
  • Groundwater Resources (Quantity and Quality)

MOHID Land is mainly developed by IST (University of Lisbon, Portugal) and Action Modulers. MOHID Land is open source and distributed under GNU public license.

Water Cycle