Modeling water flow and bacterial transport in undisturbed lysimeters under irrigations of dairy shed effluent and water using HYDRUS-1D

Jiang, Shuang; Pang, Liping; Buchan, Graeme D.; Šimůnek, Jiřı́; Noonan, Mike J.; Close, Murray E.

doi:10.1016/j.watres.2009.08.039

Cited by 76 publications

(73 citation statements)

References 37 publications

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“…However, field experiments have frequently revealed that preferential pathways are a major contributor to the overall transport of microbes because they are typically strongly retained in the soil matrix (Abu-Ashour et al, 1994;Bales et al, 1989;Jiang et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Estimation and upscaling of dual-permeability model parameters for the transport of E. coli D21g in soils with preferential flow

Wang

Bradford

Šimůnek

2014

Journal of Contaminant Hydrology

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Dual-permeability models are increasingly used to quantify the transport of solutes and microorganisms in soils with preferential flow. An ability to accurately determine the model parameters and their variation with preferential pathway characteristics is crucial for predicting the transport of microorganisms in the field. The dual-permeability model with optimized parameters was able to accurately describe the transport of E. coli D21g in columns with artificial macropores of different configurations and lengths at two ionic strength levels (1 and 20 mM NaCl). Correlations between the model parameters and the structural geometry of the preferential flow path were subsequently investigated. Decreasing the macropore length produced a decrease in the apparent saturated hydraulic conductivity of the macropore domain and an increase in the mass transfer between the macropore and matrix domains. The mass transfer coefficient was also found to be dependent on the configuration of the preferential flow pathway. A linear superposition approach was used to estimate field-scale preferential transport behavior for hypothetical fields with different amounts and configurations of macropores. Upscaling procedures were numerically investigated to predict this field-scale transport behavior from column-scale parameters. The upscaling method provided a satisfactory prediction of the field results under the tested scenarios. This information will be useful in assessing the risks of microbial transport due to preferential flow.

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Section: Introductionmentioning

confidence: 99%

Estimation and upscaling of dual-permeability model parameters for the transport of E. coli D21g in soils with preferential flow

Wang

Bradford

Šimůnek

2014

Journal of Contaminant Hydrology

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“…The first-order decay constant for both attached and free phase E. coli was found to be 0.1-0.12 day −1 at both sites. Jiang et al (2010) used this value between 0.3 and 0.8 day −1 . This value was a little lower in our study because of the low temperature during the whole study period.…”

Section: E Colimentioning

confidence: 99%

“…HYDRUS (2D/3D) (Šimůnek et al, 2006) is a physically based mechanistic model that solves the Richards equation for water flow and a convection-dispersion equation for solute transport (Šimůnek et al, 2008). The model has been used during the last few years to simulate the transport of soil water (Hassan et al, 2010;Kandelous andŠimůnek, 2010;Ma et al, 2010), salts (Roberts et al, 2009), nitrates (Crevoisier et al, 2008;Doltra and Munoz, 2010;Wang et al, 2010), microorganisms (Jiang et al, 2010;Schijven andŠimůnek, 2002), and organic contaminants (Cheviron and Coquet, 2009;Pang et al, 2000) in variably-saturated soil formations in a variety of soil geometries and irrigation systems. The model was chosen, as it is capable of simulating reactive and colloidal transport in two dimensions.…”

Section: Introductionmentioning

confidence: 99%

Simulation of the redistribution and fate of contaminants from soil-injected animal slurry

Amin

Šimůnek

Lægdsmand

2014

Agricultural Water Management

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a b s t r a c tSpreading of contaminants from land-applied animal slurry may create hazard for both soil and water environments. Both the leaching and persistence of the contaminants is controlled by the redistribution of the contaminants immediately after application, while the redistribution is influenced by site conditions (here different slurry dry matter content and soil texture). HYDRUS-2D was used to simulate the redistribution of water, chloride, mineral N, Salmonella Typhimurium Bacteriophage 28B (phage), Escherichia coli, and steroid hormone estrogens near the slurry injection slit over a 50-day period after slurry injection at two field sites (Silstrup and Estrup) in Denmark to estimate the controlling transport and reaction parameters based on field measurements of the contaminants. The calibrated model was thereafter used to predict the leaching potential into the subsoil. The simulations confirmed that the higher water contents measured in the slurry application slit were due to a change in the hydraulic parameters. Chloride was redistributed considerably beyond the sampled soil profile at Estrup, but not at Silstrup, which had lower hydraulic conductivities than Estrup. Average size of the microorganisms affected their mobility; the bigger the size, the higher was the effect of the site conditions. The sorption coefficient of estrogens for slurry-amended soil was remarkably lower than that for unamended soil. The study suggests that dissolved organic carbon retained in slurry can facilitate the transport of contaminants. E. coli, phage, and estrogens were vulnerable to leaching from the very first precipitation event after the slurry application, whereas mineral N started to leach when NO 3 -N accumulated. Model predictions suggest that there are potential risks of leaching of these contaminants from the top soil to the subsoil associated with the land-injected slurry.

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“…Several studies (e.g. Cey et al, 2009;Darnault et al, 2004;Guber et al, 2005;Jiang et al, 2010;Pang et al, 2008;Pivetz et al, 1996;Unc and Goss, 2003;Wang et al, 2013) have revealed that microorganisms and colloids can transport within preferential flow pathways.…”

Section: Introductionmentioning

confidence: 99%

Bacteria transport and retention in intact calcareous soil columns under saturated flow conditions

Firouzi

Homaee

Klumpp

et al. 2015

Journal of Hydrology and Hydromechanics

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Study of bacterial transport and retention in soil is important for various environmental applications such as groundwater contamination and bioremediation of soil and water. The main objective of this research was to quantitatively assess bacterial transport and deposition under saturated conditions in calcareous soil. A series of leaching experiments was conducted on two undisturbed soil columns. Breakthrough curves of Pseudomonas fluorescens and Cl were measured. After the leaching experiment, spatial distribution of bacteria retention in the soil columns was determined. The HYDRUS-1D one-and two-site kinetic models were used to predict the transport and deposition of bacteria in soil. The results indicated that the two-site model fits the observed data better than one-site kinetic model. Bacteria interaction with the soil of kinetic site 1 revealed relatively fast attachment and slow detachment, whereas attachment to and detachment of bacteria from kinetic site 2 was fast. Fast attachment and slow detachment of site 1 can be attributed to soil calcium carbonate that has favorable attachment sites for bacteria. The detachment rate was less than 0.02 of the attachment rate, indicating irreversible attachment of bacteria. High reduction rate of bacteria was also attributed to soil calcium carbonate.

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Modeling water flow and bacterial transport in undisturbed lysimeters under irrigations of dairy shed effluent and water using HYDRUS-1D

Cited by 76 publications

References 37 publications

Estimation and upscaling of dual-permeability model parameters for the transport of E. coli D21g in soils with preferential flow

Estimation and upscaling of dual-permeability model parameters for the transport of E. coli D21g in soils with preferential flow

Simulation of the redistribution and fate of contaminants from soil-injected animal slurry

Bacteria transport and retention in intact calcareous soil columns under saturated flow conditions

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