Long-term nitrate response in shallow groundwater to agricultural N regulations in Denmark

Hansen, Birgitte; Thorling, Lærke; Kim, Hyojin; Blicher-Mathiesen, Gitte

doi:10.1016/j.jenvman.2019.03.075

Cited by 40 publications

(19 citation statements)

References 24 publications

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“…Nitrate is a widespread drinking water pollutant. 5 , 6 Although evidence from animal studies suggests an impairment of reproduction and fetal development following nitrate exposure, 7–13 limited human research has been undertaken regarding the potential impact on reproductive health. The evidence from experimental studies calls for more research in humans of low dose every day exposure to nitrate, as studies have mainly been conducted in rodents and at exposure levels far above the drinking water standard set by the World Health Organization.…”

Section: Introductionmentioning

confidence: 99%

Nitrate in Drinking Water and Time to Pregnancy or Medically Assisted Reproduction in Women and Men: A Nationwide Cohort Study in the Danish National Birth Cohort

Ebdrup¹,

Knudsen²,

Schullehner³

et al. 2022

CLEP

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Purpose No studies have investigated if drinking water nitrate affects human fecundity. Experimental studies point at detrimental effects on fetal development and on female and male reproduction. This cohort study aimed to explore if female and male preconception and long-term exposure to nitrate in drinking water was associated with fecundability measured as time to pregnancy (TTP) or use of medically assisted reproduction (MAR) treatment. Methods The study population consisted of pregnant women recruited in their first trimester in 1996–2002 to the Danish National Birth Cohort. Preconception drinking-water nitrate exposure was estimated for the pregnant women (89,109 pregnancies), and long-term drinking water nitrate exposure was estimated from adolescence to conception for the pregnant women (77,474 pregnancies) and their male partners (62,000 pregnancies) by linkage to the national drinking water quality-monitoring database Jupiter. Difference in risk of TTP >12 months or use of MAR treatment between five exposure categories and log-transformed continuous models of preconception and long-term nitrate in drinking water were estimated. Binominal regression models for risk ratios (RR) were adjusted for age, occupation, education, population density, and lifestyle factors. Results Nitrate in drinking water (median preconception exposure: 1.9 mg/L; median long-term exposure: 3.3 mg/L) was not associated with TTP >12 months or use of MAR treatment, neither in the categorical nor in the continuous models. Conclusion We found no association between preconception or long-term exposure to drinking water nitrate and fecundability.

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Section: Introductionmentioning

confidence: 99%

Nitrate in Drinking Water and Time to Pregnancy or Medically Assisted Reproduction in Women and Men: A Nationwide Cohort Study in the Danish National Birth Cohort

Ebdrup¹,

Knudsen²,

Schullehner³

et al. 2022

CLEP

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“…Forest accounts for 18% of the catchment area, the rest being used for agricultural purposes except for a limited area taken up by buildings and roads. The catchment has been part of the Danish National Environmental Monitoring Program since 1989 aiming at evaluating the effect of the Danish 125 N-regulation of agriculture on the aquatic environment (Hansen et al, 2019). During the last almost 30 years, the N concentrations in soil water, drainage, shallow groundwater and streams have been measured regularly at several stations in the agricultural fields (Blicher-Mathiesen et al, 2019).…”

Section: The Study Area 120mentioning

confidence: 99%

“…The escape of reactive nitrogen (N) from agricultural soils results in adverse environmental and human health impacts 30 (Schullehner et al, 2018;Temkin et al, 2019), including eutrophication of freshwater and estuarine ecosystems and nitrate contamination of groundwater and drinking water (Hansen et al, 2017(Hansen et al, & 2019. In Denmark, since the 1980s N-regulations of intensive agriculture at national or regional scales have succeeded in lowering the N-impact on the aquatic environment (Dalgaard et al, 2014;Hansen et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…The concentrations of redox sensitive compounds in groundwater and soil water samples, mainly dissolved oxygen (DO), nitrate, iron, and sulfate, were used for the redox interpretation in this study as well (Hansen et al, 2017(Hansen et al, & 2019. Based on water chemistry, oxic is defined by DO greater than 1mg/L, N-reducing is DO less than 1mg/L and nitrate greater than 1mg/L, and reduced is both DO and nitrate below 1 mg/L and iron greater than 0.2 mg/L.…”

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confidence: 99%

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3D multiple point geostatistical simulation of joint subsurface redox and geological architectures

Madsen¹,

Kim²,

Kallesøe³

et al. 2020

Preprint

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Abstract. Nitrate contamination of subsurface aquifers is an ongoing environmental challenge due to nitrogen (N) losses from intensive N fertilization and management on agricultural fields. The distribution and fate of nitrate in aquifers are primarily governed by geological, hydrological and geochemical conditions of the subsurface. Therefore, we propose a novel approach to model both geology and redox architectures simultaneously in high resolution 3D (25 m × 25 m × 2 m) using multiple point geostatistical simulation (MPS). Data consists of 1) mainly resistivities of the subsurface mapped with towed transient electromagnetic measurements (tTEM), and 2) information of lithology and redox conditions obtained from the borehole observations at point scale interpreted from the geological descriptions and colors of sediment samples, and chemistry analyses of water samples. The conceptual understandings of the geological and redox architectures of the study system were introduced to the simulation as training images. These data were combined with detailed soil maps and digital elevation models to identify main geological elements defined as volumes within the subsurface. From a geological perspective, these data are considered independent from each other in terms of formation. This approach became computationally attractive by simulating smaller geological elements individually instead of the entire catchment. The final realizations were stitched together using simulations of the individual geological elements, resulting in an ensemble of realizations representing a quantification of the uncertainty for the given setup. The joint simulation of geological and redox architectures, which is one of the strengths of the MPS simulations compared to other geostatistical methods, secures that the two architectures in general show coherent patterns. Despite the inherent subjectivity of interpretations of the training images and geological element boundaries, they enable an easy and intuitive incorporation of qualitative knowledge of geology and geochemistry in quantitative simulations of the subsurface architectures. Altogether, we conclude that our approach effectively simulates the coherent geological and redox architectures of the subsurface that can be used for hydrological modelling with N-transport, which may be fundamental to better understanding of the nitrogen (N) retention of the subsurface and to future more targeted regulation of agriculture.

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“…Without the construction of a groundwater monitoring system, it is impossible to establish the level of anthropogenic pressure (Preziosi 2019 andHansen 2019) on individual rural settlements of Kyiv region and the region as a whole. Excessive use of fertilizers, especially nitrogen, is a major problem for rural areas, leading to pollution of both groundwater and surface water.In Italy, the National Environmental Protection Agency (ISPRA) publishes annual reports containing the results of monitoring programs for pesticides in surface and groundwater.…”

Section: Introductionmentioning

confidence: 99%

Challenging Questions in Environmental Monitoring of Groundwater Quality in Rural Areas of Kyiv’s Region

Serdiuk¹

2020

WPT STN

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Water resources protection is the prioritized target all over the world. Of course, it is Ukraine's aim too. Environmental crisis grows stronger because of global warming. Monitoring of groundwater quality and water resources assessment requires immediate improvement and a framework for monitoring should be launched as soon as possible. After all, the delays observed 10-15 years ago have shown that humanity is unable to postpone the issue of environmental crisis until the emergence of slow solutions, either the availability of funds, or any other favorable moment. Environmental crisis has already begun on a large scale. So, regions of Ukraine, which were fully provided with water, have started to suffer from drought and hurricanes. Water wells in rural areas are running dry and in some places the water disappeared completely. Kyiv's region is not an exception. Also, it is one of the most populated regions in Ukraine. Eco-friendly water supply to Ukrainian cities is permanently much talked-of topic in public settings. At the same time, matter of villages survival is suppressed. Taking into account disproportionate distribution of water resources between rural community and citizens, financial component becomes considerably important. Forasmuch as water is supplied for more financially reliable big-city residents for tens or even hundreds of kilometers from the location of a city. Therefore, the area that would have used these resources (most commonly it is rural area) is losing them. Approaches to solution of this problem should be overviewed and water monitoring should be actively started. Also causes of pollution of existing drinking water should be identified and removed. It is imperative to act in a goal-directed manner and to found a group of researchers and advance into action. Underground water massif should be examined as complex system (supersystem) of drinking water supply of population with the goal of improvement of current monitoring system. At the legal level there are all opportunities for implementation of the research of this system and first steps of state monitoring implementation has been done. Although it is not enough. As mathematically sound calculations show, value of this work operation and involvement WATER AND WATER PURIFICATION TECHNOLOGIES. SCIENTIFIC AND TECHNICAL NEWS

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Long-term nitrate response in shallow groundwater to agricultural N regulations in Denmark

Cited by 40 publications

References 24 publications

Nitrate in Drinking Water and Time to Pregnancy or Medically Assisted Reproduction in Women and Men: A Nationwide Cohort Study in the Danish National Birth Cohort

Nitrate in Drinking Water and Time to Pregnancy or Medically Assisted Reproduction in Women and Men: A Nationwide Cohort Study in the Danish National Birth Cohort

3D multiple point geostatistical simulation of joint subsurface redox and geological architectures

Challenging Questions in Environmental Monitoring of Groundwater Quality in Rural Areas of Kyiv’s Region

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