Reactive Transport Modeling

Abstract

This special sec on in the Vadose Zone Journal focusing on reac ve transport modeling was developed from a special symposium jointly sponsored by the Soil Physics and Soil Chemistry Divisions of the Soil Science Society of America at the 2010 annual mee ngs held in Long Beach, CA. It contains eight contribu ons refl ec ng a diverse range of reac ve transport modeling applica ons that address the fate and transport of both reac ve solutes and colloidal material (i.e., viruses). Further, the eight studies range in scale from laboratory batch and column experiments to the regional scale. Three of the submissions refl ect eff orts to model experimental data that were already reported in the literature, providing addi onal insight concerning underlying physical and chemical processes. In addi on to the obvious predic ve applica ons, the eight contribu ons to this special sec on illustrate the addional advantages to including reac ve transport modeling as an ac ve component within a diverse research agenda. In addi on to scenario tes ng, reac ve transport modeling provides a framework for synthesizing diverse experimental data, evalua ng the rela ve importance of various compe ng and interrelated biogeochemical processes, and iden fying important data gaps and research priori es under more natural condi ons at mul ple temporal and spa al scales.

Using HYDRUS to simulate the dynamic changes of Ca²⁺ and Na⁺ in sodic soils reclaimed by gypsum

“…The UNSATCHEM model can be used to assess the chemical reactions for solutions with very high ionic strengths. The model also considers kinetic chemical reactions, such as the precipitation/dissolution of calcite and the dissolution of dolomite, and is suitable to simulate the ion dynamic change in sodic soils reclaimed by gypsum (Ramos et al 2011;Seaman et al 2012). The UNSATCHEM model has recently been incorporated in the HYDRUS-1D software package (Simunek et al 2008.…”

Modelación numérica de los cambios hidrogeoquímicos en la zona no saturada del suelo sometida a distintos usos primarios en la región centro-sur bonaerense

“…Recientemente se desarrollaron modelos de TR acoplados al crecimiento de las raíces y su interacción con el sustrato, en términos de flujo de agua y solutos (Gérard et al, 2004(Gérard et al, , 2017Steefel et al, 2015;Dunbabin et al, 2013;Mayer et al, 2012;Seaman et al, 2012;Nowack et al, 2006;Hinsinger et al, 2005).…”