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Geoscientific Model Development An interactive open-access journal of the European Geosciences Union
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Discussion papers
https://doi.org/10.5194/gmd-2018-332
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gmd-2018-332
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Model description paper 01 Feb 2019

Model description paper | 01 Feb 2019

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This discussion paper is a preprint. It is a manuscript under review for the journal Geoscientific Model Development (GMD).

Modular Assessment of Rainfall-Runoff Models Toolbox (MARRMoT) v1.0: an open- source, extendable framework providing implementations of 46 conceptual hydrologic models as continuous space-state formulations

Wouter J. M. Knoben1, Jim E. Freer2, Keirnan J. A. Fowler3, Murray C. Peel3, and Ross A. Woods1 Wouter J. M. Knoben et al.
  • 1Department of Civil Engineering, University of Bristol, Bristol, BS8 1TR, UK
  • 2School of Geographical Science, University of Bristol, Bristol, BS8 1BF, UK
  • 3Department of Infrastructure Engineering, University of Melbourne, Melbourne, Parkville VIC 3052, Australia

Abstract. This paper presents the Modular Assessment of Rainfall-Runoff Models Toolbox (MARRMoT): a modular open-source toolbox containing documentation and model code for 46 existing conceptual hydrologic models. The toolbox is developed in Matlab and works with Octave. Models are implemented following several best practices: definition of model equations (the mathematical model) is kept separate from the numerical methods used to solve these equations (the numerical model) to generate clean code that is easy to adjust and debug; the Implicit Euler time-stepping scheme is provided as the default option to numerically approximate each model's Ordinary Differential Equations in a more robust way than (common) Explicit schemes would; threshold equations are smoothed to avoid discontinuities in the model's objective function space; and the model equations are solved simultaneously, avoiding physically unrealistic sequential solving of fluxes. Generalized parameter ranges are provided to assist with model inter-comparison studies. In addition to this paper and its Supporting Materials, a User Manual is provided together with several workflow scripts that show basic example applications of the toolbox. The toolbox and documentation are available from https://github.com/wknoben/MARRMoT (DOI: https://doi.org/10.5281/zenodo.2482542). Our main scientific objective in developing this toolbox is to facilitate the inter-comparison of conceptual hydrological model structures which are in widespread use, in order to ultimately reduce the uncertainty in model structure selection.

Wouter J. M. Knoben et al.
Interactive discussion
Status: final response (author comments only)
Status: final response (author comments only)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Wouter J. M. Knoben et al.
Model code and software

Modular Assessment of Rainfall-Runoff Models Toolbox - Matlab code for 46 conceptual hydrologic models. W. J. M. Knoben, J. E. Freer, K. J. A. Fowler, M. C. Peel, and R. A. Woods https://doi.org/10.5281/zenodo.2482542

Wouter J. M. Knoben et al.
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Latest update: 17 Apr 2019
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Short summary
Computer models are used to predict river flows. A good model should represent the river basin it is applied to, so that its flow predictions are as accurate as possible. However, many different computer models exist and selecting the most appropriate model for a given river basin is not always easy. This study combines computer code for 46 different hydrologic models into a single coding framework. This allows users to compare models in an objective way and can teach us about model differences.
Computer models are used to predict river flows. A good model should represent the river basin...
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