Chimera is a hydrological conceptual modelling framework that offers a type of computer meta language in which all models can be defined and then solved by uniform numerical techniques, and provides sophisticated approach to calculate sensitivities analytically. The applied rules for model definition cover a wide range of classical conceptual hydrological models, which can be built and compared straightforwardly in the scope of this framework.

Download & Installation

Chimera running in R frontend RKWard

R package chimera (build 2013-02-15)


How to install

Introducing CHiMeRa

This part is an introduction to the functionality of the program, not the CHiMeRa program as a tool for modeling of realistic hydrological systems, which will be done in a following part.

Although this part tries to be as self contained as possible, it does require a minimal knowledge of R which is not provided here.

Using CHiMeRa

With this part we will try convince the reader that CHiMeRa is a useful tool for studying conceptual hydrological models and also for using it to model observational data. This will be done by giving examples (rather than complete worked out cases).

Theory behind CHiMeRa



  • Torfs, P., Horáček, S., Rakovec, O. (2010): Chimera, a framework for conceptual modelling using analytical sensitivities to parameters: implementation and application to PDM model. 13th Biennal Conference ERB 2010 – Hydrological responses of small basins to a changing environment.
  • Máca, P., Horáček, S., Pavlásek, J., Torfs, P., Pech, P. (2011): Simulace povodňových událostí na povodí Modrava 2 různými konceptuálními modely. Hydrologie malého povodí 2011.