Investigating nitrate dynamics in a fine-textured soil affected by feedlot effluents

E.A. Veizaga, L. Rodríguez, Carlos Ocampo

    Research output: Contribution to journalArticle

    1 Citation (Scopus)

    Abstract

    © 2016 Elsevier B.V.Feedlots concentrate large volumes of manure and effluents that contain high concentrations of nitrate, among other constituents. If not managed properly, pen surfaces run-off and lagoons overflows may spread those effluents to surrounding land, infiltrating into the soil. Soil nitrate mobilization and distribution are of great concern due to its potential migration towards groundwater resources. This work aimed at evaluating the migration of nitrate originated on feedlots effluents in a fine-textured soil under field conditions. Soil water constituents were measured during a three-year period at three distinct locations adjacent to feedlot retention lagoons representing different degrees of exposure to water flow and manure accumulation. A simple statistical analysis was undertaken to identify patterns of observed nitrate and chloride concentrations and electrical conductivity and their differences with depth. HYDRUS-1D was used to simulate water flow and solute transport of Cl-, NO4+[sbnd]N, NO3-[sbnd]N and electrical conductivity to complement field data interpretation. Results indicated that patterns of NO3-[sbnd]N concentrations were not only notoriously different from electrical conductivity and Cl- but also ranges and distribution with depth differed among locations. A combination of dilution, transport, reactions such as nitrification/denitrification and vegetation water and solute uptake took place at each plots denoting the complexity of soil-solution behavior under extreme polluting conditions. Simulations using the concept of single porosity-mobile/immobile water (SP-MIM) managed structural controls and correctly simulated —all species concentrations under field data constrains. The opposite was true for the other two locations experiencing near-saturation conditions, absence of vegetation and frequent manure accumulation and runoff from feedlot lagoons. Although the results are site specific, findings are relevant to advance the understanding of NO3-[sbnd]N dynamics resulting from
    Original languageEnglish
    Pages (from-to)21-34
    JournalJournal of Contaminant Hydrology
    Volume193
    DOIs
    Publication statusPublished - 2016

    Fingerprint

    Nitrates
    Effluents
    effluent
    Manures
    nitrate
    electrical conductivity
    Soils
    manure
    lagoon
    Water
    water flow
    soil
    runoff
    Sewage lagoons
    structural control
    vegetation
    data interpretation
    Groundwater resources
    Solute transport
    groundwater resource

    Cite this

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    title = "Investigating nitrate dynamics in a fine-textured soil affected by feedlot effluents",
    abstract = "{\circledC} 2016 Elsevier B.V.Feedlots concentrate large volumes of manure and effluents that contain high concentrations of nitrate, among other constituents. If not managed properly, pen surfaces run-off and lagoons overflows may spread those effluents to surrounding land, infiltrating into the soil. Soil nitrate mobilization and distribution are of great concern due to its potential migration towards groundwater resources. This work aimed at evaluating the migration of nitrate originated on feedlots effluents in a fine-textured soil under field conditions. Soil water constituents were measured during a three-year period at three distinct locations adjacent to feedlot retention lagoons representing different degrees of exposure to water flow and manure accumulation. A simple statistical analysis was undertaken to identify patterns of observed nitrate and chloride concentrations and electrical conductivity and their differences with depth. HYDRUS-1D was used to simulate water flow and solute transport of Cl-, NO4+[sbnd]N, NO3-[sbnd]N and electrical conductivity to complement field data interpretation. Results indicated that patterns of NO3-[sbnd]N concentrations were not only notoriously different from electrical conductivity and Cl- but also ranges and distribution with depth differed among locations. A combination of dilution, transport, reactions such as nitrification/denitrification and vegetation water and solute uptake took place at each plots denoting the complexity of soil-solution behavior under extreme polluting conditions. Simulations using the concept of single porosity-mobile/immobile water (SP-MIM) managed structural controls and correctly simulated —all species concentrations under field data constrains. The opposite was true for the other two locations experiencing near-saturation conditions, absence of vegetation and frequent manure accumulation and runoff from feedlot lagoons. Although the results are site specific, findings are relevant to advance the understanding of NO3-[sbnd]N dynamics resulting from",
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    Investigating nitrate dynamics in a fine-textured soil affected by feedlot effluents. / Veizaga, E.A.; Rodríguez, L.; Ocampo, Carlos.

    In: Journal of Contaminant Hydrology, Vol. 193, 2016, p. 21-34.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Investigating nitrate dynamics in a fine-textured soil affected by feedlot effluents

    AU - Veizaga, E.A.

    AU - Rodríguez, L.

    AU - Ocampo, Carlos

    PY - 2016

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    N2 - © 2016 Elsevier B.V.Feedlots concentrate large volumes of manure and effluents that contain high concentrations of nitrate, among other constituents. If not managed properly, pen surfaces run-off and lagoons overflows may spread those effluents to surrounding land, infiltrating into the soil. Soil nitrate mobilization and distribution are of great concern due to its potential migration towards groundwater resources. This work aimed at evaluating the migration of nitrate originated on feedlots effluents in a fine-textured soil under field conditions. Soil water constituents were measured during a three-year period at three distinct locations adjacent to feedlot retention lagoons representing different degrees of exposure to water flow and manure accumulation. A simple statistical analysis was undertaken to identify patterns of observed nitrate and chloride concentrations and electrical conductivity and their differences with depth. HYDRUS-1D was used to simulate water flow and solute transport of Cl-, NO4+[sbnd]N, NO3-[sbnd]N and electrical conductivity to complement field data interpretation. Results indicated that patterns of NO3-[sbnd]N concentrations were not only notoriously different from electrical conductivity and Cl- but also ranges and distribution with depth differed among locations. A combination of dilution, transport, reactions such as nitrification/denitrification and vegetation water and solute uptake took place at each plots denoting the complexity of soil-solution behavior under extreme polluting conditions. Simulations using the concept of single porosity-mobile/immobile water (SP-MIM) managed structural controls and correctly simulated —all species concentrations under field data constrains. The opposite was true for the other two locations experiencing near-saturation conditions, absence of vegetation and frequent manure accumulation and runoff from feedlot lagoons. Although the results are site specific, findings are relevant to advance the understanding of NO3-[sbnd]N dynamics resulting from

    AB - © 2016 Elsevier B.V.Feedlots concentrate large volumes of manure and effluents that contain high concentrations of nitrate, among other constituents. If not managed properly, pen surfaces run-off and lagoons overflows may spread those effluents to surrounding land, infiltrating into the soil. Soil nitrate mobilization and distribution are of great concern due to its potential migration towards groundwater resources. This work aimed at evaluating the migration of nitrate originated on feedlots effluents in a fine-textured soil under field conditions. Soil water constituents were measured during a three-year period at three distinct locations adjacent to feedlot retention lagoons representing different degrees of exposure to water flow and manure accumulation. A simple statistical analysis was undertaken to identify patterns of observed nitrate and chloride concentrations and electrical conductivity and their differences with depth. HYDRUS-1D was used to simulate water flow and solute transport of Cl-, NO4+[sbnd]N, NO3-[sbnd]N and electrical conductivity to complement field data interpretation. Results indicated that patterns of NO3-[sbnd]N concentrations were not only notoriously different from electrical conductivity and Cl- but also ranges and distribution with depth differed among locations. A combination of dilution, transport, reactions such as nitrification/denitrification and vegetation water and solute uptake took place at each plots denoting the complexity of soil-solution behavior under extreme polluting conditions. Simulations using the concept of single porosity-mobile/immobile water (SP-MIM) managed structural controls and correctly simulated —all species concentrations under field data constrains. The opposite was true for the other two locations experiencing near-saturation conditions, absence of vegetation and frequent manure accumulation and runoff from feedlot lagoons. Although the results are site specific, findings are relevant to advance the understanding of NO3-[sbnd]N dynamics resulting from

    U2 - 10.1016/j.jconhyd.2016.08.005

    DO - 10.1016/j.jconhyd.2016.08.005

    M3 - Article

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    EP - 34

    JO - Journal of Contaminant Hydrology

    JF - Journal of Contaminant Hydrology

    SN - 0169-7722

    ER -