VN Za Hurou

Geological structure beneath the water

Which rock lies beneath the water line (Geological Map of Slovakia 1:50,000), how old it is, how thick the Quaternary cover is and in which tectonic unit the water flows. The bedrock decides the hardness of the water, the bottom, the turbidity after rain and the abundance of springs.

Quaternary cover

• fluvial sediments of floodplains100%SR 68 %

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• Typical thickness of the Quaternary cover3.5m

• 2 – 5100%SR 48 %

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Tectonic division

• NEOALPÍNSKE TEKTONICKÉ ŠTRUKTÚRY ZÁPADNÝCH KARPÁT100%SR 84 %

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Neotectonic units

• negative unit (intermountain basins)100%SR 14 %

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Direction of neotectonic movements

• small subsidence100%SR 8.8 %

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Regional geological division

• Inner Carpathian Paleogene100%SR 11 %

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Regional geological division (subunits)

• Spiš–Šariš Paleogene100%SR 5.8 %

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Susceptibility of the area to slope deformations

• Region of stable areas100%SR 95 %

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The map covers 0 of 1 points on the water line.

Hydrogeology: aquifers and groundwater

Streams and rivers are fed by groundwater. Hydrogeological maps show in which rocks the water is stored, how permeable they are and what the water in them is like. The data come from ŠGÚDŠ maps, not from measurements at a particular water.

Aquifer rocks (hydrogeological map 1:200,000)

• Gravel100%SR 52 %

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Aquifer type

• Zvodnence s prevažne medzizrnovým typom priepustnosti (prevažne nespevnené sedimenty) (Gravel; Fluviálne)100%SR 27 %

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Main hydrogeological region

• Paleogene Hornádská and part of the Poprad basin100%SR 1.4 %

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Geothermal groundwater bodies

• Levoča Basin – W and S part100%SR 9.5 %

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Surface water chemistry according to the atlas

Modelled composition of the water in the area the fishing district line runs through. The rasters of the Geochemical Atlas of Slovakia (surface waters) are an interpolation of measurements in sampled streams, so they show the typical background of the area, not a measurement in a particular stream.

Ionic composition of the water

Water type by dominant ions: Ca–Mg–HCO₃–SO₄

Shares are in equivalents, the usual way of comparing the composition of waters.

Major ions

• SulphatesSO487.1 mg/lpercentile 85
• MagnesiumMg26.4 mg/lpercentile 80
• PotassiumK5.63 mg/lpercentile 78
• CalciumCa84.0 mg/lpercentile 74
• BicarbonatesHCO3284 mg/lpercentile 72
• ChloridesCl21.4 mg/lpercentile 71
• SodiumNa12.5 mg/lpercentile 63
• FluoridesF0.140 mg/lpercentile 62

dot: average along the water line, line: from the lowest to the highest value, scale: position among sample points on streams in Slovakia (0 to 100th percentile)

Nutrients and organic pollution

• PhosphatesPO40.620 mg/lpercentile 86
• NitratesNO39.01 mg/lpercentile 69
• Chemical oxygen demandChSK3.08 mg/lpercentile 47
• AmmoniumNH40.0256 mg/lpercentile 3

Metals

• AluminiumAl353 μg/lpercentile 91
• ManganeseMn66.3 μg/lpercentile 70
• ZincZn6.07 μg/lpercentile 45
• IronFe0.0342 mg/lpercentile 13

Elements in river sediments

The Geochemical Atlas of Slovakia (river sediments) describes what the river carries in the fine material on its bed. Sediment collects metals from rocks, ore occurrences and past mining and industry. It is not a legal limit or a health risk assessment: it shows how an element on this stream ranks among streams in Slovakia.

Potentially toxic and trace elements

• MercuryHg16.6 mg/kgpercentile 95
• CopperCu94.1 mg/kgpercentile 95
• BismuthBi0.762 mg/kgpercentile 95
• TinSn5.72 mg/kgpercentile 92
• AntimonySb6.51 mg/kgpercentile 91
• SeleniumSe0.509 mg/kgpercentile 87
• ArsenicAs15.5 mg/kgpercentile 86
• ZincZn131 mg/kgpercentile 74
• ChromiumCr85.8 mg/kgpercentile 69
• CadmiumCd0.267 mg/kgpercentile 67
• MolybdenumMo0.466 mg/kgpercentile 64
• NickelNi26.4 mg/kgpercentile 58
• LeadPb16.5 mg/kgpercentile 55
• VanadiumV59.6 mg/kgpercentile 28
• CobaltCo6.94 mg/kgpercentile 26

dot: average along the water line, line: from the lowest to the highest value, scale: position among sample points on streams in Slovakia (0 to 100th percentile)

Natural radioactivity and radon

Airborne gamma-ray spectrometry by ŠGÚDŠ measures radiation from potassium, uranium and thorium in rocks and soil. Granites and some acidic volcanic rocks have the highest values, limestones and floodplains the lowest. Caesium-137 is a remnant of fallout from the Chernobyl accident and nuclear weapons tests.

• Potassium (K)K1.45 %percentile 80
• Equivalent uranium (eU)eU2.79 ppm72th percentile
• Equivalent thorium (eTh)eTh7.38 ppm52th percentile

dot: average along the water line, line: from the lowest to the highest value, scale: position among sample points on streams in Slovakia (0 to 100th percentile)

• Areal activity of 137CsCS137935 Bq/m²percentile 15

Geophysical fields: magnetics and gravity

Maps of the magnetic field and gravity (ŠGÚDŠ) reveal what lies beneath the sediments and the surface: volcanic bodies, faults and crustal thickness. For an angler they are interesting indirectly: they show where the bedrock changes, and with it the water.

Geothermal potential

The Atlas of Geothermal Energy of Slovakia records rock temperature and heat flow from the Earth's interior. It is the potential of the area, not the actual warmth of the water in the stream. Specific geothermal boreholes and springs near this water are in the geothermal energy section below.

Geothermal groundwater bodies beneath the water line

• Levoča Basin – W and S part100%SR 9.5 %

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Relief, climate and soils

A basin is not just water: slope and elevation determine the speed of runoff, climate the temperature and amount of water, and soils what is washed into the stream. The data come from the geomorphological division, climatic-geographical types and soil maps of ŠGÚDŠ.

• Elevation of geomorphological units (from–to)367–502m a.s.l.
• Average elevation of the units405m a.s.l.
• Average slope4.5°
• Average January temperature-3.8°C
• Average July temperature17.8°C
• Annual precipitation700mm

Geomorphological units

• Hornád Basin100%SR 0.0 %

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Geomorphological regions

• Fatra–Tatra area100%SR 21 %

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Climatic-geographical types

• basin climate100%SR 29 %

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Map of the corridor

Where the nearest mine workings, deposits, burdens, geothermal boreholes and gold finds are. Groups can be switched off.

Gold and ore minerals in river sediments

Regional panning prospecting: the heavy fraction was washed out of river gravel and the mineral grains in it were counted. The map of finds is positive: a sample without gold is not listed in the atlas, so the absence of a find is not proof that there is no gold.

• Barite (BaSO₄)11 samples, at most 815 grains
• Hematite (Fe₂O₃)11 samples, at most 4115 grains
• Magnetite (Fe₃O₄)11 samples, at most 155 grains
• Pyrite (FeS₂)11 samples, at most 315 grains
• Rutil (TiO₂)11 samples, at most 315 grains
• Limonite (FeO(OH)·nH₂O)10 samples, at most 315 grains
• Anatas (TiO₂)9 samples, at most 5 grains
• Monazit ((Ce,La,Nd)PO₄)6 samples, at most 55 grains
• Chalcopyrite (CuFeS₂)5 samples, at most 5 grains
• Ilmenit (FeTiO₃)2 samples, at most 5 grains
• Cinabarit (HgS)2 samples, at most 25 grains
• Arsenopyrite (FeAsS)1 sample, at most 5 grains
• Markazit (FeS₂)1 sample, at most 5 grains

Rock-forming and accessory minerals

• Epidot (Ca₂(Al,Fe)₃Si₃O₁₂(OH))11 samples, at most 155 grains
• Granáty ((Fe,Mg,Ca,Mn)₃Al₂Si₃O₁₂)11 samples, at most 815 grains
• Zirconium (ZrSiO₄)11 samples, at most 815 grains
• Tourmalines (complex borosilicate)10 samples, at most 5 grains
• Spinel (Cr-spinel) ((Mg,Fe)(Al,Cr)₂O₄)6 samples, at most 55 grains
• Staurolit (Fe₂Al₉Si₄O₂₃(OH))2 samples, at most 5 grains
• Pyroxény ((Mg,Fe,Ca)₂Si₂O₆)2 samples, at most 55 grains

Groundwater: chemistry, water types and radioactivity

Hydrogeochemical objects (analyses of springs and boreholes), the geochemical atlas of groundwater (1996) and radiohydrochemical sampling. Groundwater feeds streams, so its composition also affects the water in the stream.

Chemical water types nearby

• Ca-Mg-HCO320×
• Ca-Mg-SO4-HCO310×
• Ca-HCO34×
• Mg-Ca-HCO34×
• Ca-Mg-HCO3-SO42×
• Ca-SO4-HCO31×
• Na-Mg-SO4-HCO3-Cl1×

Water quality class according to the hydrogeochemical map

• class A27×
• class C6×
• class E3×
• class G3×
• class B1×
• class H1×
• class D1×

Metals in groundwater

• SeleniumSeextreme (top 1 %)
  highest 10.0 μg/lmedian 0.500 μg/l19 samples84 % below the limit of quantification
  1. up to 50 %
  2. 50–75
  3. 75–90
  4. 90–99
  5. above 99

  Highest value: studňa1992, 2.8 km from the water. Comparison: percentile 99 of all samples in Slovakia.

• AluminiumAlextreme (top 1 %)
  highest 0.420 mg/lmedian 0.0200 mg/l19 samples26 % below the limit of quantification
  1. up to 50 %
  2. 50–75
  3. 75–90
  4. 90–99
  5. above 99

  Highest value: prameň1993, 70 m from the water. Comparison: percentile 99 of all samples in Slovakia.

• AntimonySbhigh (top 5 %)
  highest 2.90 μg/lmedian 0.200 μg/l19 samples47 % below the limit of quantification
  1. up to 50 %
  2. 50–75
  3. 75–90
  4. 90–99
  5. above 99

  Highest value: prameň1993, 1.4 km from the water. Comparison: percentile 98 of all samples in Slovakia.

• LithiumLihigh (top 5 %)
  highest 87.0 μg/lmedian 7.00 μg/l19 samples11 % below the limit of quantification
  1. up to 50 %
  2. 50–75
  3. 75–90
  4. 90–99
  5. above 99

  Highest value: studňa1992, 2.8 km from the water. Comparison: percentile 97 of all samples in Slovakia.

• CadmiumCdhigh (top 5 %)
  highest 1.10 μg/lmedian 0.250 μg/l19 samples95 % below the limit of quantification
  1. up to 50 %
  2. 50–75
  3. 75–90
  4. 90–99
  5. above 99

  Highest value: studňa1993, 2.6 km from the water. Comparison: percentile 97 of all samples in Slovakia.

• LeadPbhigh (top 5 %)
  highest 5.00 μg/lmedian 1.00 μg/l19 samples42 % below the limit of quantification
  1. up to 50 %
  2. 50–75
  3. 75–90
  4. 90–99
  5. above 99

  Highest value: prameň1992, 1.0 km from the water. Comparison: percentile 97 of all samples in Slovakia.

• MercuryHghigh (top 5 %)
  highest 0.300 μg/lmedian 0.100 μg/l19 samples95 % below the limit of quantification
  1. up to 50 %
  2. 50–75
  3. 75–90
  4. 90–99
  5. above 99

  Highest value: studňa1992, 2.9 km from the water. Comparison: percentile 96 of all samples in Slovakia.

• ChromiumCrhigh (top 5 %)
  highest 5.70 μg/lmedian 0.500 μg/l19 samples47 % below the limit of quantification
  1. up to 50 %
  2. 50–75
  3. 75–90
  4. 90–99
  5. above 99

  Highest value: studňa1993, 350 m from the water. Comparison: percentile 96 of all samples in Slovakia.

• ArsenicAshigh (top 5 %)
  highest 4.50 μg/lmedian 0.500 μg/l19 samples63 % below the limit of quantification
  1. up to 50 %
  2. 50–75
  3. 75–90
  4. 90–99
  5. above 99

  Highest value: vrt1992, 1.7 km from the water. Comparison: percentile 95 of all samples in Slovakia.

• CopperCuslightly elevated
  highest 3.60 μg/lmedian 0.900 μg/l19 samples
  1. up to 50 %
  2. 50–75
  3. 75–90
  4. 90–99
  5. above 99

  Highest value: studňa1992, 2.8 km from the water. Comparison: percentile 88 of all samples in Slovakia.

• ZincZnslightly elevated
  highest 172 μg/lmedian 9.00 μg/l19 samples
  1. up to 50 %
  2. 50–75
  3. 75–90
  4. 90–99
  5. above 99

  Highest value: studňa1992, 1.2 km from the water. Comparison: percentile 77 of all samples in Slovakia.

Radon in waters

Mine workings, deposits and ore occurrences

Old mine workings outside mining areas (Geofond register), deposits and mining areas, and the metallogenetic map. Gold, silver and other metals near streams can get into sediments and water.

Deposits and mining areas

Ore occurrences in the metallogenic map

Boreholes and Geofond archive reports

Register of hydrogeological boreholes, other boreholes and geothermal boreholes. Each borehole has a report in the Geofond archive (geological profiles, pumping tests, chemical analyses of the water); the report number is in the table.

64 boreholes in the 3 km zone, of which 35 hydrogeological and 29 other; with an archive report number 64.

Borehole depths

• up to 10 m44×
• 10–30 m7×
• 30–100 m4×
• 100–300 m9×
• over 300 m0×

Nearest boreholes

Geothermal energy and mineral waters

Geothermal boreholes (wellhead water temperature, yield, chemical type) and sources of geothermal and mineral waters within 10 km. Data on the use and existence of a borehole come from the Geofond register.

Sources of geothermal and mineral waters

Environmental burdens, landfills and anthropogenic sediments

Recorded environmental burdens (industrial sites, landfills, mining), the register of waste landfills and monitoring of anthropogenic sediments (industrial sludge). It is a list of places, not a measurement of water pollution.

Environmental burdens

Waste landfills