A unifying model framework for soil erosion, river bedload and chemical transport

IF 3.1 Q2 GEOSCIENCES, MULTIDISCIPLINARY
Amina Nouhou Bako , Carine Lucas , Frédéric Darboux , François James , Noémie Gaveau
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Abstract

A unified framework for simulating various transport processes in the environment is presented. It consists in a single set of partial differential equations. The main feature of this model framework is its exchange layer, which allows to treat several types of transfer between the soil and the surface water.

The model framework equations, termed transfer equations, is shown to reproduce three independently-published models developed for soil erosion, river bedload, and chemical transport respectively. By allowing the different processes to be represented within a single model framework, the transfer equations are therefore unifying the representation of particles and chemical fluxes in the environment. The transfer equations are implemented into the open-source software FullSWOF_1D. The code is verified against the approximation of an exact solution, assuring its proper functioning. A good adequacy is found between our numerical results and those published in the literature, attesting the capability of the transfer equations to unify modeling of soil erosion, river bedload, and chemical transport. Hence, the transfer equations can decrease the number of models to be used for simulating transfer of materials in the environment, and limit the number of computer codes to be developed and maintained. The transfer equations could also help in drawing parallels between different fields of hydrology.

土壤侵蚀、河流推移质和化学物质迁移的统一模型框架
提出了一个统一的模拟环境中各种运输过程的框架。它由一组偏微分方程组成。这个模型框架的主要特点是它的交换层,它允许处理土壤和地表水之间的几种类型的转移。模型框架方程,称为传递方程,被证明再现了三个独立发表的模型,分别为土壤侵蚀、河床负荷和化学物质输送开发。通过允许在单一模型框架内表示不同的过程,传递方程因此统一了环境中颗粒和化学通量的表示。在开源软件FullSWOF_1D中实现了传递方程。根据精确解的近似值对代码进行了验证,确保其正常运行。我们的数值结果与文献中发表的结果之间存在很好的充分性,证明了传递方程能够统一土壤侵蚀、河床负荷和化学物质运移的建模。因此,传递方程可以减少用于模拟环境中物质传递的模型的数量,并限制需要开发和维护的计算机代码的数量。传递方程还有助于在不同的水文学领域之间建立相似之处。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of Hydrology X
Journal of Hydrology X Environmental Science-Water Science and Technology
CiteScore
7.00
自引率
2.50%
发文量
20
审稿时长
25 weeks
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