Quantification of chemical transport processes from the soil to surface runoff

Kun Tian, Chi Hua Huang, Guang Qian Wang, Xu Dong Fu, Gary Parker

Research output: Contribution to journalArticle

Abstract

There is a good conceptual understanding of the processes that govern chemical transport from the soil to surface runoff, but few studies have actually quantified these processes separately. Thus, we designed a laboratory flow cell and experimental procedures to quantify the chemical transport from soil to runoff water in the following individual processes: (i) convection with a vertical hydraulic gradient, (ii) convection via surface flow or the Bernoulli effect, (iii) diffusion, and (iv) soil loss. We applied different vertical hydraulic gradients by setting the flow cell to generate different seepage or drainage conditions. Our data confirmed the general form of the convection-diffusion equation. However, we now have additional quantitative data that describe the contribution of each individual chemical loading process in different surface runoff and soil hydrological conditions. The results of this study will be useful for enhancing our understanding of different geochemical processes in the surface soil mixing zone.

Original languageEnglish (US)
Pages (from-to)83-93
Number of pages11
JournalJournal of Environmental Quality
Volume42
Issue number1
DOIs
StatePublished - Jan 1 2013

ASJC Scopus subject areas

  • Environmental Engineering
  • Water Science and Technology
  • Waste Management and Disposal
  • Pollution
  • Management, Monitoring, Policy and Law

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