Quantification of Chemical Transport Processes from the Soil to Surface Runoff

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...

Full description

Saved in:
Bibliographic Details
Published in:Journal of environmental quality 2013-01, Vol.42 (1), p.83-93
Main Authors: Tian, Kun, Huang, Chi‐hua, Wang, Guang‐qian, Fu, Xu‐dong, Parker, Gary
Format: Article
Language:English
Subjects:
Chemical transport
Chemicals
Convection
Herbivores
Hydraulic gradient
Loam soils
Soil
Soil Pollutants
Soil surfaces
Soils
Studies
Surface flow
Surface runoff
Surface water
Transport processes
Water
Water Movements
Water Pollutants, Chemical
Water pollution
Water quality
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:0047-2425
1537-2537
DOI:10.2134/jeq2011.0470