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2 results for “groundwater pollution”
Predicted locations and nitrate pollution of groundwater discharge from D3pl karst aquifer in Latvia
<p><strong>Description</strong></p> <p>A georeferenced raster data layer [5_predicted_D3pl_GW_discharge_zone.tif] showing predicted likelihood that groundwater polluted with nitrate (NO<sub>3</sub><sup>-</sup>) is discharging as springs or diffuse seepage from the Upper Devonian Pļaviņas (<em>D<sub>3</sub>pl</em>) dolomite karst aquifer in Latvia is presented. The cell value indicates the likelihood (0 – low, 1 - high) that groundwater with nitrate contamination is discharging from the <em>D<sub>3</sub>pl</em> aquifer at this location. Value of 0 means that no groundwater is discharging there. The BalticTM 93 (EPSG:25884) references system is used.</p> <p>The rationale and methodology for elaborating the map of groundwater discharge as springs or diffuse seepage from the <em>D<sub>3</sub>pl</em> dolomite karst aquifer is described in the main article (Kalvāns et al. under review). In short, a 3D regional geological model (Popovs et al. 2015), land surface elevation model and bedrock surface elevation model (Popovs et al. under review) were combined to identify locations where aquitard at the base of <em>D<sub>3</sub>pl</em> aquifer is outcropping at bedrock surface and in the nearby depressions (in a distance up to 0.25 km) the land surface was below the surface of this aquitard. The likely contamination with NO<sub>3</sub><sup>-</sup> was estimated from proportion of arable land (European Environment Agency 2018) within 4.75 km window. It is assumed that the NO<sub>3</sub><sup>-</sup> contamination in the <em>D<sub>3</sub>pl</em> karst aquifer is likely only close to its distribution margins, where groundwater table is deeper than the top of the aquifer.</p> <p>This work was supported by the EU Interreg Est–Lat program project GroundEco No. Est-Lat62, and base funding grant from the Latvian Ministry of Education and Science to the University of Latvia, No. ZD2016/AZ03.</p> <p><strong>References</strong></p> <p>European Environment Agency (2018) Corine Land Cover 2018. https://land.copernicus.eu/pan-european/corine-land-cover/clc2018?tab=download (CLC). Accessed 1 Jun 2020</p> <p>Popovs K, Kalvāns A, Jemeljanova M, et al (under review) Bedrock surface topography map of Latvia. J Maps</p> <p>Popovs K, Saks T, Jātnieks J (2015) A comprehensive approach to the 3D geological modelling of sedimentary basins: example of Latvia, the central part of the Baltic Basin. Est J Earth Sci 64:173–188. https://doi.org/10.3176/earth.2015.25</p> <p> </p>
Potential for shoreline recession to accelerate discharge of groundwater pollutants to coastal waters
<p>Included in this repository are supporting field data used to produce the results of the manuscript submitted to Water Resources Research:</p> <p>Sabina Rakhimbekova, Christopher Power, Denis M. O’Carroll, Clare E. Robinson, (2023) "<strong>Potential for shoreline recession to accelerate discharge of groundwater pollutants to coastal waters"</strong></p>
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