The HPx software for multicomponent reactive transport during variably-saturated flow: Recent developments and applications

Title:

The HPx software for multicomponent reactive transport during variably-saturated flow: Recent developments and applications

Creator:

Jacques, Diederik, Šimůnek, Jiří, Mallants, Dirk, and van Genuchten, Martinus Th.

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:db060fe2-e378-4333-a4d5-7758361e16e2
uuid:db060fe2-e378-4333-a4d5-7758361e16e2
doi:10.1515/johh-2017-0049

Subject:

HYDRUS, HPx, numerical modeling, reactive transport, organic matter, and bioturbation

Type:

article, model:article, and TEXT

Description:

HPx is a multicomponent reactive transport model which uses HYDRUS as the flow and transport solver and PHREEQC-3 as the biogeochemical solver. Some recent adaptations have significantly increased the flexibility of the software for different environmental and engineering applications. This paper gives an overview of the most significant changes of HPx, such as coupling transport properties to geochemical state variables, gas diffusion, and transport in two and three dimensions. OpenMP allows for parallel computing using shared memory. Enhancements for scripting may eventually simplify input definitions and create possibilities for defining templates for generic (sub)problems. We included a discussion of root solute uptake and colloid-affected solute transport to show that most or all of the comprehensive features of HYDRUS can be extended with geochemical information. Finally, an example is used to demonstrate how HPx, and similar reactive transport models, can be helpful in implementing different factors relevant for soil organic matter dynamics in soils. HPx offers a unique framework to couple spatial-temporal variations in water contents, temperatures, and water fluxes, with dissolved organic matter and CO2 transport, as well as bioturbation processes.

Language:

Slovak

Rights:

http://creativecommons.org/publicdomain/mark/1.0/
policy:public

Source:

Journal of hydrology and hydromechanics | 2018 Volume:66 | Number:2

Harvested from:

CDK

Metadata only:

false