2D modelling of coast and sea

MIKE 21 is by far the most versatile tool for coastal modelling. If you need to simulate physical, chemical or biological processes in coastal or marine areas, MIKE 21 certainly has the tools you need.

MIKE 21 is proven technology. No other modelling package has been used for as many coastal and marine engineering projects worldwide as MIKE 21. The recipe for the unique success of MIKE 21 is simple: it gives you maximum flexibility, higher productivity and full confidence in the results.


  • Proven technology and more than a 25-year track record of successful applications
  • Maximum flexibility, high productivity and reliable and accurate results
  • MIKE 21 is modular – you buy what you need and nothing more
  • It comes with a wealth of first class tools that enhance and ease modelling possibilities
  • Expert technical support
  • Regular training courses
  • Access to DHI know-how wherever you are


The following is a small subset of the almost endless list of possible MIKE 21 applications:

  • Design data assessment for coastal and offshore structures
  • Optimisation of port layouts and coastal protection measures
  • Cooling water, desalination and recirculation analysis
  • Optimisation of coastal outfalls
  • Environmental impact assessment of marine infrastructures
  • Ecological modelling including optimisation of aquaculture systems
  • Optimisation of renewable energy systems
  • Water forecast for safe marine operations and navigation
  • Coastal flooding and storm surge warnings
  • Inland flooding and overland flow modelling