VN Pod Šachtou

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.

The points follow the water line (for a stream and a basin, fishing district after fishing district). The strip is a cross-section by distance, not a map; the width of a section corresponds to the number of points.

• Clays and sands of basins100%SR 0.3 %

marker on the bar: share among all sample points on streams in Slovakia

Clays and sands of basins: Clays and sands of basins; the water is usually moderately mineralised and turbid after rain.

Geological age of the rocks

• Neogene100%

Most common rock units

Quaternary cover

• Typical thickness of the Quaternary cover3.5m

• 2 – 5100%SR 48 %

marker on the bar: share among all sample points on streams in Slovakia

Regional geological division

• neovolcanic rocks100%SR 10 %

marker on the bar: share among all sample points on streams in Slovakia

Regional geological division (subunits)

• Central Slovak neovolcanic rocks100%SR 8.8 %

marker on the bar: share among all sample points on streams in Slovakia

Engineering-geological districts

• region of fine-grained cohesive sediments100%SR 0.0 %

marker on the bar: share among all sample points on streams in Slovakia

Engineering-geological formations

• molasse formation100%SR 0.5 %

marker on the bar: share among all sample points on streams in Slovakia

Susceptibility of the area to slope deformations

• Region of stable areas100%SR 95 %

marker on the bar: share among all sample points on streams in Slovakia

The map covers 1 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)

• Basic volcanic rocks100%SR 6.6 %

marker on the bar: share among all sample points on streams in Slovakia

Aquifer type

• Menšie zvodnence s medzizrnovým alebo puklinovým typom priepustnosti alebo oblasti s takmer žiadnymi množstvami podzemnej vody100%SR 6.4 %

marker on the bar: share among all sample points on streams in Slovakia

Type of permeability (basic hydrogeological map 1:50,000)

• intergranular100%SR 86 %

marker on the bar: share among all sample points on streams in Slovakia

Hydrogeological function

• aquiclude100%SR 2.9 %

marker on the bar: share among all sample points on streams in Slovakia

Main hydrogeological region

• neovolcanic rocks of Kremnické vrchy100%SR 0.0 %

marker on the bar: share among all sample points on streams in Slovakia

Geothermal groundwater bodies

• Žiar Basin100%SR 6.4 %

marker on the bar: share among all sample points on streams in Slovakia

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–HCO₃–SO₄

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

Major ions

• SulphatesSO441.9 mg/lpercentile 52
• SodiumNa8.09 mg/lpercentile 46
• PotassiumK2.72 mg/lpercentile 45
• ChloridesCl6.58 mg/lpercentile 42
• MagnesiumMg6.72 mg/lpercentile 19
• FluoridesF0.0591 mg/lpercentile 16
• CalciumCa25.3 mg/lpercentile 15
• BicarbonatesHCO367.5 mg/lpercentile 10

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

• Chemical oxygen demandChSK3.17 mg/lpercentile 50
• AmmoniumNH40.0950 mg/lpercentile 45
• NitratesNO35.27 mg/lpercentile 40
• PhosphatesPO40.0697 mg/lpercentile 35

Metals

• AluminiumAl893 μg/lpercentile 95
• IronFe0.134 mg/lpercentile 61
• ZincZn3.60 μg/lpercentile 26
• ManganeseMn7.02 μg/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

• VanadiumV102 mg/kgpercentile 89
• CobaltCo12.1 mg/kgpercentile 87
• ArsenicAs12.7 mg/kgpercentile 82
• MercuryHg0.158 mg/kgpercentile 67
• ZincZn111 mg/kgpercentile 63
• TinSn2.98 mg/kgpercentile 62
• LeadPb17.4 mg/kgpercentile 59
• MolybdenumMo0.417 mg/kgpercentile 57
• SeleniumSe0.247 mg/kgpercentile 50
• CadmiumCd0.164 mg/kgpercentile 45
• CopperCu22.6 mg/kgpercentile 45
• BismuthBi0.191 mg/kgpercentile 39
• ChromiumCr62.4 mg/kgpercentile 34
• AntimonySb0.443 mg/kgpercentile 29
• NickelNi18.5 mg/kgpercentile 23

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.

• Equivalent uranium (eU)eU2.69 ppm64th percentile
• Equivalent thorium (eTh)eTh7.71 ppm61th percentile
• Potassium (K)K1.24 %percentile 28

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 137CsCS1371,115 Bq/m²percentile 25

Radon risk by isopleths

• medium100%SR 64 %

marker on the bar: share among all sample points on streams in Slovakia

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

• Žiar Basin100%SR 6.4 %

marker on the bar: share among all sample points on streams in Slovakia

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)273–867m a.s.l.
• Average elevation of the units476m a.s.l.
• Average slope8.2°
• Average January temperature-4.8°C
• Average July temperature16.5°C
• Annual precipitation725mm

Geomorphological units

• Upper Nitra Basin100%SR 1.4 %

marker on the bar: share among all sample points on streams in Slovakia

Geomorphological regions

• Fatra–Tatra area100%SR 21 %

marker on the bar: share among all sample points on streams in Slovakia

Climatic-geographical types

• basin climate100%SR 29 %

marker on the bar: share among all sample points on streams in Slovakia

Soil contamination (map 1:500,000)

• relatively clean soil100%SR 53 %

marker on the bar: share among all sample points on streams in Slovakia

Lithogeochemical types

• Neogene100%SR 48 %

marker on the bar: share among all sample points on streams in Slovakia

Map of the corridor

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

Trace elements in surface waters

Arsenic, antimony, cadmium, lead, copper, zinc and other elements in samples from rivers and streams (Geochemical Atlas of Slovakia, surface waters, 2015). The bar shows where the highest value lies among all samples in Slovakia; the light marker is the median of the samples at this water.

• ArsenicAsslightly elevated
  highest 2.00 μg/lmedian 1.25 μg/l2 samples50 % below the limit of quantification
  1. up to 50 %
  2. 50–75
  3. 75–90
  4. 90–99
  5. above 99

  Highest value: Handlovka1992, 540 m from the water. Comparison: percentile 75 of all samples in Slovakia.

• CadmiumCdslightly elevated
  highest 0.250 μg/lmedian 0.250 μg/l2 samples
  1. up to 50 %
  2. 50–75
  3. 75–90
  4. 90–99
  5. above 99

  Highest value: Handlovka, 140 m from the water. Comparison: percentile 75 of all samples in Slovakia.

• CopperCutypical value
  highest 1.70 μg/lmedian 1.35 μg/l2 samples50 % below the limit of quantification
  1. up to 50 %
  2. 50–75
  3. 75–90
  4. 90–99
  5. above 99

  Highest value: Handlovka1992, 140 m from the water. Comparison: percentile 59 of all samples in Slovakia.

• SeleniumSebelow half of Slovakia
  highest 0.500 μg/lmedian 0.500 μg/l2 samples100 % below the limit of quantification
  1. up to 50 %
  2. 50–75
  3. 75–90
  4. 90–99
  5. above 99

  Highest value: Handlovka1992, 140 m from the water. Comparison: percentile 46 of all samples in Slovakia.

• LeadPbbelow half of Slovakia
  highest 2.50 μg/lmedian 2.50 μg/l2 samples100 % below the limit of quantification
  1. up to 50 %
  2. 50–75
  3. 75–90
  4. 90–99
  5. above 99

  Highest value: Handlovka1992, 140 m from the water. Comparison: percentile 43 of all samples in Slovakia.

• AntimonySbbelow half of Slovakia
  highest 0.500 μg/lmedian 0.500 μg/l2 samples100 % below the limit of quantification
  1. up to 50 %
  2. 50–75
  3. 75–90
  4. 90–99
  5. above 99

  Highest value: Handlovka1992, 140 m from the water. Comparison: percentile 37 of all samples in Slovakia.

• LithiumLibelow half of Slovakia
  highest 5.00 μg/lmedian 5.00 μg/l2 samples100 % below the limit of quantification
  1. up to 50 %
  2. 50–75
  3. 75–90
  4. 90–99
  5. above 99

  Highest value: Handlovka1992, 140 m from the water. Comparison: percentile 34 of all samples in Slovakia.

• ChromiumCrbelow half of Slovakia
  highest 1.00 μg/lmedian 1.00 μg/l2 samples100 % below the limit of quantification
  1. up to 50 %
  2. 50–75
  3. 75–90
  4. 90–99
  5. above 99

  Highest value: Handlovka1992, 140 m from the water. Comparison: percentile 32 of all samples in Slovakia.

• StrontiumSrbelow half of Slovakia
  highest 100 μg/lmedian 95.0 μg/l2 samples
  1. up to 50 %
  2. 50–75
  3. 75–90
  4. 90–99
  5. above 99

  Highest value: Handlovka1992, 140 m from the water. Comparison: percentile 28 of all samples in Slovakia.

• BariumBabelow half of Slovakia
  highest 20.0 μg/lmedian 20.0 μg/l2 samples
  1. up to 50 %
  2. 50–75
  3. 75–90
  4. 90–99
  5. above 99

  Highest value: Handlovka1992, 140 m from the water. Comparison: percentile 23 of all samples in Slovakia.

Major ions, mineralisation and pH

Basic water chemistry: which rocks the minerals in it come from.

• Silicon dioxideSiO2elevated (top 10 %)
  highest 36.1 mg/lmedian 27.5 mg/l2 samples
  1. up to 50 %
  2. 50–75
  3. 75–90
  4. 90–99
  5. above 99

  Highest value: Handlovka1992, 540 m from the water. Comparison: percentile 93 of all samples in Slovakia.

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.

• Hematite (Fe₂O₃)1 sample, at most 5 grains
• Pyrite (FeS₂)1 sample, at most 55 grains
• Sphalerite (ZnS)1 sample, at most 12 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-HCO31×

Water quality class according to the hydrogeochemical map

• class B1×

Metals in groundwater

• AluminiumAlhigh (top 5 %)
  highest 0.190 mg/lmedian 0.0200 mg/l9 samples11 % below the limit of quantification
  1. up to 50 %
  2. 50–75
  3. 75–90
  4. 90–99
  5. above 99

  Highest value: prameň1991, 1.6 km from the water. Comparison: percentile 98 of all samples in Slovakia.

• CopperCuhigh (top 5 %)
  highest 10.8 μg/lmedian 1.40 μg/l9 samples
  1. up to 50 %
  2. 50–75
  3. 75–90
  4. 90–99
  5. above 99

  Highest value: prameň1991, 840 m from the water. Comparison: percentile 97 of all samples in Slovakia.

• CadmiumCdhigh (top 5 %)
  highest 0.700 μg/lmedian 0.250 μg/l9 samples89 % below the limit of quantification
  1. up to 50 %
  2. 50–75
  3. 75–90
  4. 90–99
  5. above 99

  Highest value: prameň1991, 840 m from the water. Comparison: percentile 96 of all samples in Slovakia.

• ArsenicAselevated (top 10 %)
  highest 2.60 μg/lmedian 1.00 μg/l9 samples44 % below the limit of quantification
  1. up to 50 %
  2. 50–75
  3. 75–90
  4. 90–99
  5. above 99

  Highest value: prameň1991, 2.4 km from the water. Comparison: percentile 91 of all samples in Slovakia.

• LeadPbelevated (top 10 %)
  highest 2.00 μg/lmedian 0.500 μg/l9 samples78 % below the limit of quantification
  1. up to 50 %
  2. 50–75
  3. 75–90
  4. 90–99
  5. above 99

  Highest value: prameň1991, 1.6 km from the water. Comparison: percentile 90 of all samples in Slovakia.

• ZincZnslightly elevated
  highest 222 μg/lmedian 2.00 μg/l9 samples22 % below the limit of quantification
  1. up to 50 %
  2. 50–75
  3. 75–90
  4. 90–99
  5. above 99

  Highest value: prameň1991, 2.6 km from the water. Comparison: percentile 79 of all samples in Slovakia.

• ChromiumCrtypical value
  highest 0.500 μg/lmedian 0.250 μg/l9 samples89 % below the limit of quantification
  1. up to 50 %
  2. 50–75
  3. 75–90
  4. 90–99
  5. above 99

  Highest value: prameň1991, 2.3 km from the water. Comparison: percentile 66 of all samples in Slovakia.

• LithiumLitypical value
  highest 9.00 μg/lmedian 2.00 μg/l9 samples44 % below the limit of quantification
  1. up to 50 %
  2. 50–75
  3. 75–90
  4. 90–99
  5. above 99

  Highest value: prameň1991, 1.6 km from the water. Comparison: percentile 56 of all samples in Slovakia.

• IronFetypical value
  highest 0.00500 mg/lmedian 0.00500 mg/l5 samples100 % below the limit of quantification
  1. up to 50 %
  2. 50–75
  3. 75–90
  4. 90–99
  5. above 99

  Highest value: prameň1991, 2.9 km from the water. Comparison: percentile 50 of all samples in Slovakia.

• MercuryHgbelow half of Slovakia
  highest 0.100 μg/lmedian 0.100 μg/l9 samples100 % below the limit of quantification
  1. up to 50 %
  2. 50–75
  3. 75–90
  4. 90–99
  5. above 99

  Highest value: prameň1991, 2.3 km from the water. Comparison: percentile 46 of all samples in Slovakia.

• AntimonySbbelow half of Slovakia
  highest 0.100 μg/lmedian 0.100 μg/l9 samples100 % below the limit of quantification
  1. up to 50 %
  2. 50–75
  3. 75–90
  4. 90–99
  5. above 99

  Highest value: prameň1991, 2.3 km from the water. Comparison: percentile 40 of all samples in Slovakia.

• SeleniumSebelow half of Slovakia
  highest 0.500 μg/lmedian 0.500 μg/l9 samples100 % below the limit of quantification
  1. up to 50 %
  2. 50–75
  3. 75–90
  4. 90–99
  5. above 99

  Highest value: prameň1991, 2.3 km from the water. Comparison: percentile 39 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.

Types of mining objects

• spoil heap2×

Nearest old mine workings

Deposits and mining areas

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.

15 boreholes in the 3 km zone, of which 3 hydrogeological and 12 other; with an archive report number 15.

Borehole depths

• up to 10 m10×
• 10–30 m3×
• 30–100 m0×
• 100–300 m1×
• over 300 m1×

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.

Waste landfills

Landslides and slope deformations

Register of documented slope deformations (Geofond). Landslides by a stream can bring fine material into the water, change the bed and dam the channel.

Types of deformations

• Landslides27×
• Undermined landslides16×
• Block fields10×
• Block fissures4×
• Undermined blocks2×
• Rockfalls1×
• Slope flows1×

Degree of activity

• Potenciálny29×
• Stabilizovaný17×
• Aktívny11×
• With potential and active forms3×
• With stabilised and potential forms1×

Current state

• Processed only in the scope of registration on a scale of 1:25,0004×