Modelling Impact of Adjusted Agricultural Practices on Nitrogen Leaching to Groundwater

Glavan, Matjaž; Jamšek, Andrej; Pintar, Marina

doi:10.5772/66324

Cited by 2 publications

(2 citation statements)

References 19 publications

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“…Several studies [22][23][24] were conducted in vulnerable areas where groundwater is not a good state. While studying nitrate leaching, just like the work above, they were limited to catchment scale, and the model used was SWAT.…”

Section: Hydraulic Conductivity [Mm/h]mentioning

confidence: 99%

Perspectives of Hydrologic Modeling in Agricultural Research

Curk¹,

Glavan²

2021

Hydrology

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For decades agricultural research was done in the field or laboratories, but with the rise of computer science, hydrologic modeling became another essential tool for environmental impact studies. Many types of models can be used, each with its strengths and weaknesses in terms of accuracy, speed, and amount of input data needed. Models can be used on different scales and simulate very different processes. Based on a literature review, APEX (Agricultural Policy Extender) and SWAT (Soil and Water Assessment Tool) models are the most popular for environmental research in agronomy. An important share of modeling work in agronomic studies is focused on pollution research, mainly nutrient and pesticide leaching and soil erosion processes. Other topics include simulating the effects of irrigation and other agricultural practices and studying the impact of extreme weather events and climate change. When working with model results, it is crucial to be mindful of inevitable uncertainties and consider them during interpretation. Modeling is gaining importance in agronomic research in Slovenia, with many studies done in the recent decade and more underway.

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Section: Hydraulic Conductivity [Mm/h]mentioning

confidence: 99%

Perspectives of Hydrologic Modeling in Agricultural Research

Curk¹,

Glavan²

2021

Hydrology

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“…Anthropogenic application of organic and inorganic fertilisers of nitrogen (N) in agricultural landscapes and livestock wastes have a negative impact on groundwater resources quality due to leaching of N species into aquifers (Glavan et al, 2017). Agricultural practices represented up to one third of anthropogenic emissions of greenhouse gases (GHGs) (Gilbert, 2012), such as nitrous oxide (N2O), methane (CH4) and carbon dioxide (CO2), which all contribute to climate change and N2O to stratospheric ozone destruction (IPCC, 2014).…”

Section: Introductionmentioning

confidence: 99%

Dynamics of greenhouse gases in the river–groundwater interface in a gaining river stretch (Triffoy catchment, Belgium)

et al. 2018

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This study investigates the occurrence of greenhouse gases (GHGs) and the role of groundwater as an indirect pathway of GHG emissions into surface waters in a gaining stretch of the Triffoy River agricultural catchment (Belgium). To this end, nitrous oxide (N2O), methane (CH4) and carbon dioxide (CO2) concentrations, the stable isotopes of nitrate and major ions were monitored in river and groundwater during 8 months. Results indicated that groundwater was strongly oversaturated in N2O and CO2 with respect to atmospheric equilibrium (50.1 vs. 0.55 µg/L for N2O and 14,569 vs. 400 ppm for CO2), but only marginally for CH4 (0.45 vs. 0.056 µg/L), suggesting that groundwater can be a source of these GHGs to the atmosphere. Nitrification seemed to be the main process for the accumulation of N2O in groundwater. Oxic conditions prevailing in the aquifer were not prone to the accumulation of CH4. In fact, the emissions of CH4 from the river were one to two orders of magnitude higher than the inputs from groundwater, meaning that CH4 emissions from the river were due to CH4 in-situ production in riverbed or riparian zone sediments. For CO2 and N2O, average emissions from groundwater were 1.5 × 10 5 kg CO2 Ha-1 y-1 and 207.1 kg N2O Ha-1 y-1 , respectively. Groundwater is probably an important source of N2O and CO2 in gaining streams but when the measures are scaled at catchment scale, these fluxes are probably relatively modest. Nevertheless, their quantification would better constrain nitrogen and carbon budgets in natural systems.

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Modelling Impact of Adjusted Agricultural Practices on Nitrogen Leaching to Groundwater

Cited by 2 publications

References 19 publications

Perspectives of Hydrologic Modeling in Agricultural Research

Perspectives of Hydrologic Modeling in Agricultural Research

Dynamics of greenhouse gases in the river–groundwater interface in a gaining river stretch (Triffoy catchment, Belgium)

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