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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-2019-354
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gmd-2019-354
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: model description paper 14 Jan 2020

Submitted as: model description paper | 14 Jan 2020

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This preprint is currently under review for the journal GMD.

Solver for Hydrologic Unstructured Domain (SHUD): Numerical modeling of watershed hydrology with the finite volume method

Lele Shu1, Paul A. Ullrich1, and Christopher J. Duffy2 Lele Shu et al.
  • 1Department of Land, Air, and Water Resources, University of California, Davis, Davis, California 95616, USA
  • 2Department of Civil and Environmental Engineering, Pennsylvania State University, University Park, Pennsylvania 16802, USA

Abstract. Hydrological modeling is an essential strategy for understanding natural flows, particularly where observations are lacking in either space or time, or where topographic roughness leads to a disconnect in the characteristic timescales of overland and groundwater flow. Consequently, significant opportunities remain for the development of extensible modeling systems that operate robustly across regions. Towards the development of such a robust hydrological modeling system, this paper introduces the Solver for Hydrological Unstructured Domain (SHUD), an integrated multi-process, multi-scale, multi-timestep hydrological model, in which hydrological processes are fully coupled using the Finite Volume Method. The SHUD integrates overland flow, snow accumulation/melting, evapotranspiration, subsurface and groundwater flow, and river routing, while realistically capturing the physical processes in a watershed. The SHUD incorporates one-dimension unsaturated flow, two-dimension groundwater flow, and river channels connected with hillslopes via overland flow and baseflow.

This paper introduces the design of SHUD, from the conceptual and mathematical description of hydrological processes in a watershed to computational structures. To demonstrate and validate the model performance, we employ three hydrological experiments: the V-Catchment experiment, Vauclin's experiment, and a study of the Cache Creek Watershed in northern California, USA.

Possible applications of then SHUD model include hydrological studies from the hillslope scale to regional scale, water resource and stormwater management, and coupling research with related fields such as limnology, agriculture, geochemistry, geomorphology, water quality, and ecology, climatic and landuse change. In general, SHUD is a valuable scientific tool for any modeling task involving simulating and understanding the hydrological response.

Lele Shu et al.

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Status: open (until 11 Mar 2020)
Status: open (until 11 Mar 2020)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Lele Shu et al.

Data sets

User manual of SHUD model L. Shu https://doi.org/10.5281/zenodo.3561295

V-catchment L. Shu https://doi.org/10.5281/zenodo.3566022

Vauclin(1979) experiment L. Shu https://doi.org/10.5281/zenodo.3566020

Cache Creek Watershed L. Shu https://doi.org/10.5281/zenodo.3566034

Model code and software

SHUD model L. Shu https://doi.org/10.5281/zenodo.3561293

Lele Shu et al.

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Latest update: 20 Feb 2020
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Short summary
Hydrological modeling is an essential strategy for understanding natural flows. This paper introduces the design of SHUD model, from the conceptual and mathematical description of hydrological processes in a watershed. Possible applications of then SHUD model include hydrological studies from the hillslope scale to regional scale, water resource and stormwater management.
Hydrological modeling is an essential strategy for understanding natural flows. This paper...
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