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SUMMA 2.0.0 Sopron version (lubuntu-16.04.4)

Authors: Martyn Clark · Bart Nijssen
Resource type:Model Program Resource
Created:May 11, 2018 at 12:17 a.m.
Last updated: Dec 08, 2018 at 12:42 a.m. by YOUNGDON CHOI


SUMMA (Clark et al., 2015a;b;c) is a hydrologic modeling framework that can be used for the systematic analysis of alternative model conceptualizations with respect to flux parameterizations, spatial configurations, and numerical solution techniques. It can be used to configure a wide range of hydrological model alternatives and we anticipate that systematic model analysis will help researchers and practitioners understand reasons for inter-model differences in model behavior. When applied across a large sample of catchments, SUMMA may provide insights in the dominance of different physical processes and regional variability in the suitability of different modeling approaches. An important application of SUMMA is selecting specific physics options to reproduce the behavior of existing models – these applications of "model mimicry" can be used to define reference (benchmark) cases in structured model comparison experiments, and can help diagnose weaknesses of individual models in different hydroclimatic regimes.

SUMMA is built on a common set of conservation equations and a common numerical solver, which together constitute the “structural core” of the model. Different modeling approaches can then be implemented within the structural core, enabling a controlled and systematic analysis of alternative modeling options, and providing insight for future model development.

The important modeling features are:

The formulation of the conservation model equations is cleanly separated from their numerical solution;

Different model representations of physical processes (in particular, different flux parameterizations) can be used within a common set of conservation equations; and

The physical processes can be organized in different spatial configurations, including model elements of different shape and connectivity (e.g., nested multi-scale grids and HRUs).

This version updated for the sopron workshop in Hungary(15~18 April, 2018)

Subject Keywords

Hydrological Model,physical process,sopron2018,framework,Unifying Multiple Modeling Alternatives,modeling,hydrologic,Hydrological Community Model

How to cite

Clark, M., B. Nijssen (2018). SUMMA 2.0.0 Sopron version (lubuntu-16.04.4), HydroShare, http://www.hydroshare.org/resource/041671fbc8a544cd8a979af6c2227f92

This resource is shared under the Creative Commons Attribution CC BY.


Sharing status:

  • Public Resource  Public
  • Sharable Resource  Shareable


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The people or organizations that created the intellectual content of the resource.

Name Organization Address Phone Author Identifiers
Martyn Clark NCAR
Bart Nijssen University of Washington
Content files
Computational Engine

Programming Language Fortran
Operating System lubuntu-16.04.4
Software Repository https://github.com/NCAR/summa/tree/sopron_2018
Release Date 04/15/2018
Version Sopron workshop version
Website http://www.ral.ucar.edu/projects/summa


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