Modelling approach


Model Classification

There are different types of classification concering hydrological and hydraulic modelling. The schedule line as shown below is made according to the classification in CHOW [*1].

Organigram of model classification

Spatial discretisation

  • Lumped models: Lumped models treat the watershed area as one entity. They do not separate or discretise the catchment area into different parts.
  • Spatial Discretised Models: In hydrological models spatial rough discretisation can either be grid based or related to a geographical classification of natural landscapes. In hydraulic models also a vertical discretisation is of note. In case of horizontal and vertical discretisation more dimensional approach is possible.

Temporal discretisation

  • Related to event: Models of this category are related to the duration of an event including the initiating process and the associated reaction.
  • Continuous: Longtime models try to characterize the hydrological cycle as a whole considering all relevant processes. That is they describe the hydrological situation in a continuous way, without being limited by a selected process or timeframe.

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Flood modelling



*1 CHOW (1985): Applied Hydrology



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