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Skład izotopowy azotanów w wodach podziemnych Polski

Leśniak P. M., Wilamowski A.

Przegląd Geologiczny

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2017

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Vol. 65, nr 11/1

1104--1108

EN

The level of nitrate concentration in groundwater is a measure of the degree of contamination of the environment. However, it says little about the origin of nitrates. Stable isotopes of N and O (δ15 N and δ18 O) can differentiate between manure and chemicalfertilizers. This is the reason for undertaking a study on groundwater with high concentration of nitrates in the national monitoring network to recognize the origin of nitrates. Contrary to expectations, the results suggest that nitrates are derived mostly from manures and less from chemical fertilizers. Further studies are urgently needed.

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Średni czas pobytu wód podziemnych w zlewniach Wisły i Narwi na podstawie oznaczeń trytu

Nowicki Z., Leśniak P. M., Wilamowski A.

Przegląd Geologiczny

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2016

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Vol. 64, nr 8

545--551

EN

An issue of mean residence time (MRT) evaluation, i.e. the period of time from rainfall until drainage of groundwater by rivers (Danube River Basin, Vistula River Basin and Narew River Basin), is discussed Asimple method of evaluating the groundwater MRT for the Danube River Basin based on tritium data is introduced. It has been confirmed that the historical tritium level in the rivers, being higher than in precipitation, has its end and is reversed, opening a new pathway in understanding the surface-groundwater interaction and specifically in evaluating MRT of groundwater. The authors have defined a separate notification for mean residence time of the whole water in the basin (τ) and mean residence time for groundwater in the basin (τwp). Based on the tritium study the obtained τ values are 6.5 and 5.7 years for the Vistula River Basin (VRB) and the Narew River Basin (NRB), respectively. In turn, the obtained τwp values are 8.0 and 6.0 years, respectively. NRB is a lowland plain and a morphologically, geologically and hydrogeologically uniform basin. The obtained τ wp of groundwater is thus representative for the whole basin. Instead inmorphologically non uniform VRB basin groundwater τwp is a generalized value,i.e.averaged over contributed parts of the basin.

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Zawartość trytu i skład izotopowy tlenu w płytkich wodach podziemnych w punktach badawczych krajowej sieci monitoringu

Nowicki Z., Leśniak P.M., Wilamowski A.

Przegląd Geologiczny

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2015

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Vol. 63, nr 10/2

976--980

EN

The points of the national network of groundwater monitoring comprise a stable benchmarks in quality and quantity monitoring. The obtained data (tritium and δ18O) are important for understanding the groundwater cycling and are indirect indicators of aquifer vulnerability to anthropogenic pollution. The goal of this paper is to present the relation of the tritium content and delta value of stable isotopes of oxygen against the groundwater sampling depth in 2004–2012. It is demonstrated that the remains of “nuclear” tritium concentration is still present in groundwater as a tritium peak at depths around 30 m. Determination of dynamics of recharge in groundwater bodies, based on national network observation points is associated to the estimation of the groundwater residence time in aquifers and remains one the vital problem of hydrogeology.

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Wartości progowe stanu chemicznego JCWPd a klasyfikacja jakości wód podziemnych

Leśniak P. M., Nowicki Z., Sadurski A., Skrzypczyk L.

Przegląd Geologiczny

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2015

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Vol. 63, nr 3

179–-185

EN

The paper deals with implementing water directives of the European Union and making them consistent with national regulations. It has been indicated how the existing national law (Regulation of the Ministry of Environment, July 23, 2008) attaches the threshold values of good chemical status in EU directives to the national quality classification. Advantages, disadvantages and consequences of leaving them together, as well as a proposal of their disentanglement have been given.

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Identyfikacja procesów kształtujących skład chemiczny wód podziemnych poniżej torfowiska-Pożary, Kampinoski Park Narodowy

Porowska D., Leśniak P. M.

Przegląd Geologiczny

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2008

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Vol. 56, nr 11

982-990

EN

The aim of this study was to identify hydrogeochemical processes controlling chemical composition of groundwater of the existing peatland. The site of the study is located within the Pożary Special Protection Area of the Kampinos National Park. Lithological profilem consists mainly of varigrained sand, covered by organic matter constituting peatland. The groundwater table fluctuates between 0.6 m below and 0.3 m above ground level. Combination of high organic content of soil profile and shallow depth to the water table causes slightly reducing conditions, especially in the upper part of aquifer. There, oxidation of organic matter (and/or methane) as well as nitrate and sulphate reduction has been presumed while denitrification and/or dissimilatory nitrate reduction to ammonium (DNRA) seems to control chemistry of groundwater in deeper part of the profile. The important differences in the chemical and isotopic composition of dissolved carbon have been found in the depth profile. Carbon isotopic composition of dissolved inorganic carbon in groundwater (13CDIC) indicates that carbonate carbon is derived mostly from the decomposition of organic matter, a small contribution being derived from the dissolution of carbonate minerals. The contribution of atmospheric CO2 to chemical and isotopic composition of dissolved carbon is negligible within all parts of aquifer.

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Frakcjonowanie trwałych izotopów azotu w obiegu naturalnym - implikacje dla badań zanieczyszczeń wód podziemnych

Leśniak P.M.

Przegląd Geologiczny

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2006

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Vol. 54, nr 7

594-596

EN

Changes of the 15N/14N isotopic composition in the natural nitrogen cycle have been described. As the nitrogen natural cycle is heavily perturbed by humans, one of the isotopic method of identification of manures and fertilizers in groundwaters is provided.