Determination of nitrogen reduction levels necessary to reach groundwater quality targets in Slovenia

Andelov, Miso; Kunkel, Ralf; Uhan, Jože; Wendland, Frank

doi:10.1016/j.jes.2014.06.027

Cited by 17 publications

(21 citation statements)

References 25 publications

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“…Agencija Republike Slovenije za okolje je v sodelovanju z nemškim raziskovalnim središčem JÜLICH za območje celotne Slovenije prilagodila modelski sistem GROWA--DENUZ/WEKU (Kunkel & Wendland, 2006;Wendland et al, 2008), ki poleg bilance vode upošteva bilanco dušika ter modelira tok dušika preko tal in vodonosnika v površinska vodna telesa. Za prvo oceno zanesljivosti rezultatov tega kompleksnega modelskega sistem smo na območju plitvega aluvialnega vodonosnika Spodnje Savinjske doline s podzemno vodo v slabem kemijskem stanju izdelali primerjalno analizo rezultatov regionalnega modeliranja toka dušika preko koreninskega območja tal GROWA-DENUZ (Kunkel & Wendland, 2006;Andjelov et al, 2014Andjelov et al, , 2015 in rezultatov lokalnega modela toka dušika iz koreninskega območja tal DNDC (Li et al, 1992) v posameznih talnih profilih. Zanimala nas je stopnja ujemanja modelskih rezultatov v lokalnem in regionalnem merilu v izbranem letu 2008, ko so bile opravljene tudi obsežne terenske meritve, laboratorijske analize in študijske raziskave (Uhan, 2011), ter primernost uporabe modelskega sistema GROWA-DENUZ/WEKU za potrebe simuliranja učinkov ukrepov v smeri izboljšanja kemijskega stanja podzemnih voda.…”

Section: Uvodunclassified

Comparison of the modeling results of nitrate concentrations in soil water below the root zone in the local and regional scale

Uhan¹,

Andjelov²

2018

Geologija

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IzvlečekNa raziskovalnem območju plitvega aluvialnega vodonosnika Spodnje Savinjske doline v osrednjem delu Slovenije, predstavljamo primerjalno analizo rezultatov modeliranja vsebnosti nitrata v vodi pod koreninskim območjem tal, v lokalnem in regionalnem merilu z enodimenzijskim modelom DNDC (ang. Denitrification -Decomposition) in z regionalnim modelom GROWA-DENUZ (nem. Großräumiges wasserhaushalt -Denitrifikation im durchwurzelten Boden). Ob uporabi koncepta hidroloških enot HRU (ang. Hydrological Response Unit) in Cohenove Kappa statistične analize ujemanja ter ocenjevanja zanesljivosti rezultatov prostorskega modeliranja nitrata v vodi pod koreninskim območjem tal smo ugotovili in interpretirali predele največjega ujemanja in razhajanja modelskih rezultatov. Dobro ujemanje je bilo ugotovljeno pri najvišjih modeliranih vrednostih, odstopanja pa so bila zaznana predvsem v nižjem delu razpona modeliranih vrednosti nitrata v vodi. Vzroke odstopanja lahko domnevno iščemo predvsem v razlikah pri ocenah denitrifikacijskih pogojev v anaerobnih pogojih hipoglejev in psevdoglejev s podzemno vodo plitvo pod tlemi in v razlikah pri scenarijih gnojenja ter kmetijske prakse. AbstractThe article presents a comparative analysis of the modeling results of nitrate concentrations in water below the root zone of the soil in the local and regional scale. In this research, the field-scale DNDC (Denitrification -Decomposition) and the regional-scale GROWA-DENUZ (ger. Großräumiges wasserhaushalt -Denitrifikation im durchwurzelten Boden) models were applied to the study area of the shallow aluvial aquifer of the Spodnje Savinjska dolina in the central part of Slovenia. Using the concept of Hydrological Response Unit (HRU) and Cohen Kappa statistical analysis of the degree of agreement and assessment of the reliability of the results of spatial modeling of nitrate in soil water below the root zone, we determined and interpreted the areas of maximum agreement and disagreement of model results. A good agreement was found at the highest modeled concentrations of nitrate in soil water, whereas the greatest deviations were detected primarily in the lower part of the range. The main reasons for disagreement were differences in the estimation of the denitrification conditions in the anaerobic environments of gley-soils with the shallow groundwater and differences in fertilisation scenarios and agricultural practices. GEOLOGIJA 61/2, 215-228, Ljubljana 2018

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Section: Uvodunclassified

Comparison of the modeling results of nitrate concentrations in soil water below the root zone in the local and regional scale

Uhan¹,

Andjelov²

2018

Geologija

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“…Or they are principal for groundwater quality studies, when groundwater is a relevant pathway for pollution, e.g. Tetzlaff et al (2013a, b), Andjelov et al (2014), Celen et al (2014, Kuhr et al (2013), Zupanc et al (2011. In any case, scientists and practitioners involved in large scale investigations have to cope with data scarcity problems, especially for soil and geological parameters, while precipitation, land use and elevation data are already available at high resolution, at least for most European regions.…”

Section: State Of the Art In Model-based Groundwater Assessments At Lmentioning

confidence: 99%

“…GROWA model results are used for issues related to practical water resources management, e.g. the granting of permits to abstract groundwater on a regional level and for status reviews of groundwater bodies according to the EU WFD (Tetzlaff and Wendland 2008;Tetzlaff et al 2009c) or to simulate runoff as a prerequisite for nutrient transport modelling (Tetzlaff and Wendland 2012;Tetzlaff et al 2013a;Andjelov et al 2014).…”

Section: Environ Earth Scimentioning

confidence: 99%

Model-based assessment of groundwater recharge in Slovenia

et al. 2015

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The implementation process of the EU water legislation (EU WFD, EU GWD) has put pressure on environmental managers to create, analyse and disseminate hydrological data in recent years. In this context, distributed hydrological model results at the macro scale ([10,000 km 2 ) have gained importance for the Environment Agency of the Republic of Slovenia, too. Within a joint project the distributed water balance model GROWA, developed for Germany, has been adapted to Slovenia by re-calibrating the routine for determining the average annual groundwater recharge rate. This routine consists mainly of a base flow index approach (BFI). This BFI is based on 41 different site conditions in Slovenia, whereas lithology dominates the recharge process. This paper outlines the general GROWA approach, the required input data, and the calibration process. Validated model results for the period 1971-2000, especially total runoff and base flow, are presented and discussed. These results have been used already for practical water management issues in Slovenia on European, national and regional level. It is shown that Slovenian groundwater resources exhibit high regional and seasonal variability. Tendencies of more frequent and more pronounced droughts have been detected. As demonstrated by the results GROWA is a valuable tool for the spatially distributed assessment of groundwater recharge in Slovenia.

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“…Therefore, is nitrogen in these areas together with the plant protection products the main groundwater pollutant? Coincidence of natural geological and climate conditions, development in agriculture production management and past inappropriate decisions by authorities caused that many of drinking groundwater sources are at a high risk or even not suitable for use [6]. While Slovenia assigns the whole country as nitrate-vulnerable zone by Nitrate Directive and almost all farmers implemented Codes of Good Agricultural Practice, areas of additional special protection of drinking water groundwater resources are defined as water protection areas (WPAs).…”

Section: Introductionmentioning

confidence: 99%

Modelling Impact of Adjusted Agricultural Practices on Nitrogen Leaching to Groundwater

Glavan¹,

Jamšek²,

Pintar³

2017

Water Quality

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The aim of the research was to determine how changes in the management of agricultural land (cultivation techniques, fertilisation, type of crop and crop rotation) influence on the leaching of nitrogen from the soil profile. Research was conducted in the Drava River plain in Slovenia. The impact of 31 different scenarios of potential change in agricultural land management was evaluated using the Soil and Water Assessment Tool (SWAT) model. The research was located on the shallow aquifer with alluvial bedrock composite from carbonate and silicate layers, which is the main source of drinking water in the area. The results of the SWAT model version 2009 showed that with the constant climate and land management technology, the magnitude of nitrogen leaching from the soil profile is mainly influenced by soil properties. The most drastic effect on the increase of nitrogen leaching showed vegetable production technology, followed by cereals (corn, wheat and barley). Vegetable production even in ecological production by Slovenian standards can result in similar leaching potential as conventional farming, due to unfavourable conditions originating from soil properties (shallow soil profile). Effects of grassland production may lead to 76-98% reduction in nitrogen loss from soil profile in comparison to current practices.

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Determination of nitrogen reduction levels necessary to reach groundwater quality targets in Slovenia

Cited by 17 publications

References 25 publications

Comparison of the modeling results of nitrate concentrations in soil water below the root zone in the local and regional scale

Comparison of the modeling results of nitrate concentrations in soil water below the root zone in the local and regional scale

Model-based assessment of groundwater recharge in Slovenia

Modelling Impact of Adjusted Agricultural Practices on Nitrogen Leaching to Groundwater

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