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Gooddy, Daren C.; Withers, P. J. A.; McDonald, Hamish G.; Chilton, P.J.

doi:10.1023/a:1004975615804

Cited by 28 publications

(2 citation statements)

References 8 publications

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“…Previous studies have indicated that manure lagoons can leak at rates on the order of a few millimeters per day or more based on soil type, construction, and operation ( − ). Geochemical interactions between the seepage water and groundwater may differ from those involving fertilizer application ( 6 , − . For example, nitrate loading from the lagoon will depend on the rate of oxidation of NH 4 + and organic nitrogen released from the lagoon that, in turn, are affected by subsurface oxidation−reduction conditions and ion exchange characteristics.…”

Section: Introductionmentioning

confidence: 99%

Assessing the Impact of Animal Waste Lagoon Seepage on the Geochemistry of an Underlying Shallow Aquifer

McNab

Singleton

Moran

et al. 2006

Environ. Sci. Technol.

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Evidence of seepage from animal waste holding lagoons at a dairy facility in the San Joaquin Valley of California is assessed in the context of a process geochemical model that addresses reactions associated with the formation of the lagoon water as well as reactions occurring upon the mixture of lagoon water with underlying aquifer material. Comparison of model results with observed concentrations of NH4+, K+, PO4(3-), dissolved inorganic carbon, pH, Ca2+, Mg2+, SO4(2-), Cl-, and dissolved Ar in lagoon water samples and groundwater samples suggests three key geochemical processes: (i) off-gassing of significant quantities of CO2 and CH4 during mineralization of manure in the lagoon water, (ii) ion exchange reactions that remove K+ and NH4+ from seepage water as it migrates into the underlying anaerobic aquifer material, and (iii) mineral precipitation reactions involving phosphate and carbonate minerals in the lagoon water in response to an increase in pH as well as in the underlying aquifer from elevated Ca2+ and Mg2+ levels generated by ion exchange. Substantial off-gassing from the lagoons is further indicated by dissolved argon concentrations in lagoon water samples that are below atmospheric equilibrium. As such, Ar may serve as a unique tracer for lagoon water seepage since under-saturated Ar concentrations in groundwater are unlikely to be influenced by any processes other than mechanical mixing.

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Section: Introductionmentioning

confidence: 99%

Assessing the Impact of Animal Waste Lagoon Seepage on the Geochemistry of an Underlying Shallow Aquifer

McNab

Singleton

Moran

et al. 2006

Environ. Sci. Technol.

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“…In addition, storing PS at a lower temperature was conducive to the preservation of NH 4 + -N in the stored PS (Popovic and Jensen, 2012). Moreover, some of the NH 4 + -N may be converted into NO 3 --N (Gooddy et al, 1998), leading to an increase in the NO 3 − -N content of the stored slurry. Due to the conversions between different forms of nitrogen during slurry storage, the reduction of the NH 4 + -N content of the stored PS does not directly reflect the N loss during slurry storage.…”

Section: Changes In Nh4 + -N Contentmentioning

confidence: 99%

Effects of Long-Term Storage of Pig Slurry on Nitrogen Loss in Different Seasons and Storage Conditions

Chen,

Dong,

et al. 2024

Journal of the ASABE

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Highlights The physicochemical properties of the pig slurry in different seasons were different, the contents of COD and total nitrogen of the pig slurry in the summer were significantly higher than the pig slurry in the other seasons. The slurry temperature varied greatly in different seasons, which affected the changes of indicators in pig slurry during long-term storage. Storing pig slurry under sealed conditions was significantly more beneficial in reducing N loss, which was 47%–56% lower than that in the open treatments. Abstract. Pig slurry (PS) can be applied to farmland only in certain periods during the year, so long-term storage is required before field application. The effects of the long-term storage of the PS on N loss in different seasons and under different storage conditions (open and sealed storage) were investigated in this study. The physicochemical properties and slurry temperature varied greatly in different seasons. The electrical conductivity, chemical oxygen demand, ammonium nitrogen, nitrate nitrogen, total nitrogen (TN), and heavy metals (Cu, Zn, Pb, As, and Cd) decreased after 150 days of storage, while the pH value increased, and all these indicators (except for the heavy metals) were affected by the slurry temperature, exhibiting a larger decrease at higher slurry temperatures. The decrease in the N loss was 47%–56% lower in the sealed treatments than in the open treatments. The As, Pb, and Cd contents of the stored PS (except for the AU-OP treatment) met the requirements specified for GB/T 40750-2021. Overall, storing PS under sealed and lower temperature conditions was conducive to reducing N loss and improving the N content of the stored PS. Keywords: Heavy metal, Nitrogen loss, Open storage, Pig slurry, Sealed storage, Temperature.

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Interaction between groundwater, the hyporheic zone and a Chalk stream: a case study from the River Lambourn, UK

et al. 2010

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Understanding the processes controlling groundwater-surface water interaction is essential for effective resource management and for protecting sensitive ecosystems. Through intensive monitoring of Chalk groundwater, surface water, and shallow gravel groundwater along a river bank and below the river, using a combination of hydrochemical and hydrophysical techniques a complex pattern of interactions has been elucidated. The river is broadly in hydraulic contact with the river bed and adjacent gravels and sands (although with local variability), but these sediments are mainly hydraulically separate from the underlying Chalk at the site. The relationship between the river and underlying alluvium is variable, involving components of groundwater flow both parallel and transverse to the river and with both effluent and influent behaviour seen. The degree of groundwater-surface water interaction within the hyporheic zone at this site seems to be controlled by a number of factors including lithology, topography, and the local groundwater flow regime. While the gravel aquifer is significant in controlling groundwater-surface water interaction, its importance as a route for flow down the catchment is likely to be modest compared with river discharge.

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Cited by 28 publications

References 8 publications

Assessing the Impact of Animal Waste Lagoon Seepage on the Geochemistry of an Underlying Shallow Aquifer

Assessing the Impact of Animal Waste Lagoon Seepage on the Geochemistry of an Underlying Shallow Aquifer

Effects of Long-Term Storage of Pig Slurry on Nitrogen Loss in Different Seasons and Storage Conditions

Interaction between groundwater, the hyporheic zone and a Chalk stream: a case study from the River Lambourn, UK

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