Model Description

The relevant parts of WaTEM/SEDEM to get started with the model are described in the subsequent chapters. The purpose of this description is to give an introduction to the operating equations within the model as well as the necessary parameter inputs and their units.

• WaTEM/SEDEM: a spatially distributed soil erosion and sediment delivery model
  • Concept
  • Gross versus net erosion
  • Mean annual soil erosion rate
  • Transport capacity calculation
  • Tillage erosion
  • RUSLE factors
    • R-factor
    • K-factor
    • LS-factor
    • C-factor
    • P-factor
  • References
• Overview of formulas and units in WaTEM/SEDEM
• Routing
  • Definitions
  • Flow scheme of the routing algorithm
  • One- and two-target routing
    • Two-target routing
    • One-target routing
  • Upstream area calculation
• Routing in case of extensions
  • Definitions
  • Routing in buffers, conductive ditches and conductive buffer dams
  • Adjustment upstream area and outflux
  • Forced routing
  • Routing maps
• Curve Number extension
  • Introduction to the Curve number method
    • The original CN method
    • CN-based extension in WaTEM/SEDEM
      • Run-off in special cases
  • CN-WS
    • Additional model features
      • Buffer basins
      • Dams and ditches
      • Sewers/endpoints
    • References
• A short history of WaTEM/SEDEM