Flow

In 3Di four different flow domains are defined. These domains are defined as 2D Surface flow, 2D Interflow, 2D Groundwater flow and 1D Flow. The flow in these domains are computed based on conservation of mass and momentum. There are differences in the computation of the flow per domain. These are explained in the sections below.

Flow in 3Di

• Conservation laws
  • Conservation of mass
  • Conservation of momentum
• 2D Surface flow
  • Cross-sections and exchange levels
  • Obstacles
  • Friction
  • Water level gradients
  • Sloping terrain
  • Vegetation
• 2D Interflow
  • Basic principles of interflow
  • Computation of volume in 2D domain
  • Computation of flow in the interflow layer
  • Interflow in combination with the subgrid approach
  • Technical explanation of the four interflow types
  • Settings for interflow
  • Good to know
• 2D Groundwater flow
  • Introduction
  • Summary of groundwater concepts in 3Di
  • Groundwater concepts
  • Horton based infiltration
  • Groundwater flow
  • Numerical implementation
• 1D Flow
  • 1D Network
  • Cross-section shapes
  • 1D momentum equation
  • Friction in the 1D domain
  • Pressurized flow
  • Channels, culverts and pipes
  • Weirs and Orifices
  • Pumps
• 1D2D Exchange
  • Calculation types