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Geoscientific Model Development An interactive open-access journal of the European Geosciences Union
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Volume 7, issue 3
Geosci. Model Dev., 7, 725-736, 2014
https://doi.org/10.5194/gmd-7-725-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.
Geosci. Model Dev., 7, 725-736, 2014
https://doi.org/10.5194/gmd-7-725-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.

Model description paper 06 May 2014

Model description paper | 06 May 2014

Snow water equivalent modeling components in NewAge-JGrass

G. Formetta1, S. K. Kampf2, O. David3, and R. Rigon1 G. Formetta et al.
  • 1University of Trento, 77 Mesiano St., 38123 Trento, Italy
  • 2Dept. of Ecosystem Science and Sustainability, Colorado State University, Fort Collins, CO, USA
  • 3Dept. of Civil and Environmental Engineering, Colorado State University, Fort Collins, CO, USA

Abstract. This paper presents a package of modified temperature-index-based snow water equivalent models as part of the hydrological modeling system NewAge-JGrass. Three temperature-based snow models are integrated into the NewAge-JGrass modeling system and use many of its components such as those for radiation balance (short wave radiation balance, SWRB), kriging (KRIGING), automatic calibration algorithms (particle swarm optimization) and tests of goodness of fit (NewAge-V), to build suitable modeling solutions (MS). Similarly to all the NewAge-JGrass components, the models can be executed both in raster and in vector mode. The simulation time step can be daily, hourly or sub-hourly, depending on user needs and availability of input data. The MS are applied on the Cache la Poudre River basin (CO, USA) using three test applications. First, daily snow water equivalent is simulated for three different measurement stations for two snow model formulations. Second, hourly snow water equivalent is simulated using all the three different snow model formulae. Finally, a raster mode application is performed to compute snow water equivalent maps for the whole Cache la Poudre Basin.

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