This paper presents WHETGEO and its 1D deployment, a new, physically based model simulating the water and energy budgets in a soil column. The purpose of this contribution is twofold. First, we discuss the mathematical and numerical issues involved in solving the Richardson-Richards equation, conventionally known as Richards’ equation, and the heat equation in heterogeneous soils. In particular, for the Richardson-Richards equation (R2) we take advantage of the nested Newton-Casulli-Zanolli (NCZ) algorithm that ensures the convergence of the numerical solution in any condition. Second, starting from numerical and modelling needs, we present the design of a software that is intended to be the first building block of a new, customisable, land-surface model that is integrated with process-based hydrology. WHETGEO is developed as an open-source code, adopting the Object-Oriented paradigm and a generic programming approach in order to improve its usability and expandability. WHETGEO is fully integrated in the GEOframe/OMS3 system allowing the use of the many ancillary tools it provides. Finally the paper presents the 1D deployment of WHETGEO, WHETGEO-1D, which has been tested against the available analytical solutions presented in Appendix.

Implementing the Water, HEat and Transport model in GEOframe WHETGEO-1D v.1.0: algorithms, informatics, design patterns, open science features, and 1D deployment / Tubini, Niccolò; Rigon, Riccardo. - In: GEOSCIENTIFIC MODEL DEVELOPMENT. - ISSN 1991-959X. - ELETTRONICO. - 2022, 15:1(2022), pp. 75-104. [10.5194/gmd-2021-163]

Implementing the Water, HEat and Transport model in GEOframe WHETGEO-1D v.1.0: algorithms, informatics, design patterns, open science features, and 1D deployment.

Tubini, Niccolò;Rigon, Riccardo
2022-01-01

Abstract

This paper presents WHETGEO and its 1D deployment, a new, physically based model simulating the water and energy budgets in a soil column. The purpose of this contribution is twofold. First, we discuss the mathematical and numerical issues involved in solving the Richardson-Richards equation, conventionally known as Richards’ equation, and the heat equation in heterogeneous soils. In particular, for the Richardson-Richards equation (R2) we take advantage of the nested Newton-Casulli-Zanolli (NCZ) algorithm that ensures the convergence of the numerical solution in any condition. Second, starting from numerical and modelling needs, we present the design of a software that is intended to be the first building block of a new, customisable, land-surface model that is integrated with process-based hydrology. WHETGEO is developed as an open-source code, adopting the Object-Oriented paradigm and a generic programming approach in order to improve its usability and expandability. WHETGEO is fully integrated in the GEOframe/OMS3 system allowing the use of the many ancillary tools it provides. Finally the paper presents the 1D deployment of WHETGEO, WHETGEO-1D, which has been tested against the available analytical solutions presented in Appendix.
2022
1
Tubini, Niccolò; Rigon, Riccardo
Implementing the Water, HEat and Transport model in GEOframe WHETGEO-1D v.1.0: algorithms, informatics, design patterns, open science features, and 1D deployment / Tubini, Niccolò; Rigon, Riccardo. - In: GEOSCIENTIFIC MODEL DEVELOPMENT. - ISSN 1991-959X. - ELETTRONICO. - 2022, 15:1(2022), pp. 75-104. [10.5194/gmd-2021-163]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11572/324794
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