Fishing conditions score, the best window of the day and fishing districts from the best conditions Low activity · average of one fishing district 15:00–17:00 Spojovací kanál Martovce, window score 40. The score is an estimate of conditions based on weather, water and surroundings, not a bite forecast. Recalculated at 18:04. The course of the watercourse and its fishing districts. You can switch the line color to today's conditions, quality or any other parameter. Detailed filtersregion, district, riverbed, depth, shading, satellites, water chemistry and pollution, fish, geology Move the map with two fingers. In full-screen mode one finger is enough. The score is an estimate of conditions based on weather, water and surroundings, not a bite forecast. For each fishing district you can see what it is made of, how well it is supported by data and where the data comes from. How the watercourse falls downstream: fall, gradient and water speed. Very slow watercourse A lowland, almost stagnant section: calm, often more turbid water; the bottom tends to be muddy and sandy. Typical of carp fishing districts. Source: Open Topo Data (eudem25m), 4 Nov 2026. Gradient and fall are approximate and include only the sections of fishing districts. Loading the 3D terrain model… Changes in the surroundings and nature from 2017 to 2023: how the banks, vegetation and landscape around the water change. The images switch automatically; you can also browse them by hand. Orthophoto mosaic of Slovakia © GKÚ Bratislava, NLC Zvolen. The year and day of imaging depend on the location, so individual years may differ in season and weather. Water quality according to SHMÚ, wastewater treatment plants near the fishing districts and groundwater nearby 1 of 1 fishing district with measurements has groundwater nearby with a value above the limit for at least one indicator. Source: SHMÚ (yearbooks on surface and groundwater quality), the register of wastewater treatment plants from VÚVH and the EEA. A SHMÚ site is assigned to a fishing district by the same watercourse name and by distance; the yearbook lists the sites that failed the standard, so a missing site is not proof of clean water. Metals and gold in river sediments and water, old mine workings and deposits, boreholes with archive reports, geothermal energy, environmental burdens and landslides around the stream The overview is based on public registers and atlases of the State Geological Institute of Dionýz Štúr. The search covers a zone around the water of all fishing districts of the stream (2 km of line in total): stream samples within 1 km, boreholes, mine workings and burdens within 3 km, ore occurrences within 5 km, geothermal sources within 10 km. pH 7.9modelled estimate water type Ca–Mg–HCO₃ Mineralisation 1,024 mg/l, very hard water (31.6 °dH). Interpolation of measurements from the Geochemical Atlas of Slovakia, not a measurement in the stream. 0 from 15elements in the top 10 % highest: Mercury 0.220 mg/kg Position of the highest-ranked element among the sample points on streams in Slovakia: percentile 77. Interpolation of the Geochemical Atlas of river sediments. 55°C at 1,000 m depth heat flow 75 mW/m² At a depth of 2,000 m about 95 °C (increase of 40 °C per kilometre). Atlas of Geothermal Energy of Slovakia. 49nGy/h dose rate percentile 40 in Slovakia Natural background from rocks and soil (potassium, uranium, thorium), not a value measured at the water. Airborne gamma-ray spectrometry by ŠGÚDŠ. 0objects within 3 km No old mine working is recorded within 3 km of the water. 0samples with gold No gold was found in river sediment samples within 1 km of the water. The samples do not cover every stream, so this does not mean there is no gold here. 2 from 8indicators in the top 5 % highest: Lead 11.0 μg/l Position of the highest measured value in the distribution of all surface water samples in Slovakia: percentile 99 (Patinský kanál). 105boreholes within 3 km 122 water analyses nearby Of these, 104 have an archive report from Geofond. The boreholes are hydrogeological, geological, engineering-geological and other. 65°C at the wellhead 9 geothermal boreholes within 10 km Warmest: Kolárovo (Nesvady) – K-3, yield 1.5 l/s, 8.0 km from the water. 0sites within 3 km No environmental burden is registered within 3 km; landfills are only recorded. 4records within 5 km 4 ore occurrences Geofond registers, the metallogenetic map and the mineral resources map. 0areas within 3 km Documented landslides in the Geofond register. A landslide into a stream can cloud the water and change the bed. 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. marker on the bar: share among all sample points on streams in Slovakia marker on the bar: share among all sample points on streams in Slovakia marker on the bar: share among all sample points on streams in Slovakia marker on the bar: share among all sample points on streams in Slovakia marker on the bar: share among all sample points on streams in Slovakia marker on the bar: share among all sample points on streams in Slovakia marker on the bar: share among all sample points on streams in Slovakia marker on the bar: share among all sample points on streams in Slovakia marker on the bar: share among all sample points on streams in Slovakia marker on the bar: share among all sample points on streams in Slovakia The map covers 0 of 1 points on the water line. 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. marker on the bar: share among all sample points on streams in Slovakia marker on the bar: share among all sample points on streams in Slovakia marker on the bar: share among all sample points on streams in Slovakia marker on the bar: share among all sample points on streams in Slovakia marker on the bar: share among all sample points on streams in Slovakia marker on the bar: share among all sample points on streams in Slovakia marker on the bar: share among all sample points on streams in Slovakia marker on the bar: share among all sample points on streams in Slovakia 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. pH 7.87typical range Most rivers and streams in Slovakia have a pH of 6.5 to 8.5. More acidic water is found in streams on acidic rocks (granites, quartzites), more alkaline water near limestones. 31.6°dH, very hard Sum of calcium and magnesium (5.65 mmol/l). Hard water is buffered and its pH changes more slowly; soft water is more sensitive to acid rain. 1,024mg/l mineralisation Total amount of dissolved minerals. Clean mountain water has tens of mg/l, lowland and limestone waters hundreds. Water type by dominant ions: Ca–Mg–HCO₃ Shares are in equivalents, the usual way of comparing the composition of waters. 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) 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. 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) 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. 49nGy/h in air Natural background from rocks and soil; higher over granites and some acidic volcanic rocks, lower over limestones and floodplains. low Radon is a natural gas from rocks. The risk concerns buildings and cellars, not the water in the stream; it shows what the bedrock is like. 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) marker on the bar: share among all sample points on streams in Slovakia 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. +34nT range 34 to 34 nT Deviation of the Earth's magnetic field from its surroundings. Positive and negative anomalies reveal rocks with magnetite (basalts, basic volcanic rocks) and boundaries in the bedrock. -2mGal residual −0.9 mGal Negative values lie over thick sediments and under mountains (light crust), positive over dense rocks and thinner crust. It shows the structure of the Earth's crust, not the water. 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. 55 / 95 °Cat depths of 1,000 and 2,000 m increase of 40 °C per km The line shows the rock temperature; the dotted part is only an extension to the surface. Heat flow 75 mW/m². marker on the bar: share among all sample points on streams in Slovakia 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. marker on the bar: share among all sample points on streams in Slovakia marker on the bar: share among all sample points on streams in Slovakia marker on the bar: share among all sample points on streams in Slovakia marker on the bar: share among all sample points on streams in Slovakia Where the nearest mine workings, deposits, burdens, geothermal boreholes and gold finds are. Groups can be switched off. The line is the water of the fishing district, the light band is the 3 km zone in which boreholes, mine workings and burdens were searched for. The map shows the nearest objects (at most a few dozen from each register), not all of them. The points correspond to the position in the register; area objects are marked by their centre. 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. Highest value: Patinský kanál2010, 810 m from the water. Comparison: percentile 99 of all samples in Slovakia. Highest value: Patinský kanál, 810 m from the water. Comparison: percentile 95 of all samples in Slovakia. Highest value: Patinský kanál2010, 810 m from the water. Comparison: percentile 87 of all samples in Slovakia. Highest value: Martovský kanál2010, 90 m from the water. Comparison: percentile 79 of all samples in Slovakia. Highest value: Hlin-Mart. Kanál2010, 640 m from the water. Comparison: percentile 75 of all samples in Slovakia. Highest value: Hlin-Mart. Kanál2010, 640 m from the water. Comparison: percentile 46 of all samples in Slovakia. Highest value: Hlin-Mart. Kanál2010, 640 m from the water. Comparison: percentile 34 of all samples in Slovakia. Highest value: Hlin-Mart. Kanál2010, 640 m from the water. Comparison: percentile 32 of all samples in Slovakia. Basic water chemistry: which rocks the minerals in it come from. Highest value: Martovský kanál2010, 90 m from the water. Comparison: percentile 79 of all samples in Slovakia. 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. Highest value: studňa1993, 540 m from the water. Comparison: percentile 97 of all samples in Slovakia. Highest value: studňa1993, 2.4 km from the water. Comparison: percentile 96 of all samples in Slovakia. Highest value: studňa1993, 540 m from the water. Comparison: percentile 95 of all samples in Slovakia. Highest value: studňa1993, 540 m from the water. Comparison: percentile 93 of all samples in Slovakia. Highest value: studňa1993, 2.4 km from the water. Comparison: percentile 89 of all samples in Slovakia. Highest value: studňa1993, 2.4 km from the water. Comparison: percentile 86 of all samples in Slovakia. Highest value: vrt1993, 2.7 km from the water. Comparison: percentile 75 of all samples in Slovakia. Highest value: vrt1993, 2.7 km from the water. Comparison: percentile 66 of all samples in Slovakia. Highest value: studňa1993, 2.9 km from the water. Comparison: percentile 50 of all samples in Slovakia. Highest value: studňa1993, 2.9 km from the water. Comparison: percentile 47 of all samples in Slovakia. Highest value: studňa1993, 2.9 km from the water. Comparison: percentile 46 of all samples in Slovakia. Highest value: studňa1993, 2.9 km from the water. Comparison: percentile 30 of all samples in Slovakia. 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. 105 boreholes in the 3 km zone, of which 12 hydrogeological and 93 other; with an archive report number 104. 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. Data: © ŠGÚDŠ (https://www.geology.sk), downloaded 8 Nov 2026. Details in the Methodology. Who manages the fishing districts and where they are Danube basin
By the water now
Today on the Spojovací kanál Martovce watercourse
Average of the watercourse's fishing districts
Best window today
Map and fishing districts of the watercourse
Elevation profile of the watercourse
Terrain in 3D
Historical images
Water pollution on the Spojovací kanál Martovce watercourse
Groundwater: measured valuestypical value from stations within 10 km, 2025
Geology and geochemistry of the Spojovací kanál Martovce stream
Water according to the atlas
Elements in river sediment
Heat underfoot
Natural gamma radiation
Old mine workings
Gold in river sediment
Trace elements in the stream water
Boreholes and groundwater analyses
Geothermal energy
Environmental burdens and landfills
Deposits and ore occurrences
Landslides and slope deformations
Geological structure beneath the water
Quaternary cover
Tectonic division
Neotectonic units
Direction of neotectonic movements
Regional geological division
Regional geological division (subunits)
Engineering-geological districts
Engineering-geological formations
Susceptibility of the area to slope deformations
Hydrogeology: aquifers and groundwater
Aquifer rocks (hydrogeological map 1:200,000)
Aquifer type
Type of permeability (basic hydrogeological map 1:50,000)
Hydrogeological function
Main hydrogeological region
Chemical type of groundwater
Groundwater quality class
Geothermal groundwater bodies
Surface water chemistry according to the atlas
Water acidity
Water hardness
Dissolved substances
Ionic composition of the water
Major ions
145 mg/lpercentile 96569 mg/lpercentile 9656.7 mg/lpercentile 9549.6 mg/lpercentile 9555.5 mg/lpercentile 93120 mg/lpercentile 926.16 mg/lpercentile 810.146 mg/lpercentile 64Nutrients and organic pollution
5.47 mg/lpercentile 850.338 mg/lpercentile 710.177 mg/lpercentile 654.57 mg/lpercentile 33Metals
193 μg/lpercentile 900.0818 mg/lpercentile 412.64 μg/lpercentile 1713.2 μg/lpercentile 9Elements in river sediments
Potentially toxic and trace elements
0.220 mg/kgpercentile 7732.4 mg/kgpercentile 769.61 mg/kgpercentile 749.85 mg/kgpercentile 700.336 mg/kgpercentile 6928.7 mg/kgpercentile 680.863 mg/kgpercentile 6582.0 mg/kgpercentile 653.04 mg/kgpercentile 6470.0 mg/kgpercentile 540.225 mg/kgpercentile 5314.6 mg/kgpercentile 440.287 mg/kgpercentile 3175.2 mg/kgpercentile 250.0837 mg/kgpercentile 20Major elements (iron, aluminium, calcium, magnesium, potassium, sodium, titanium, manganese, phosphorus)
1.69 %percentile 854.41 %percentile 773.16 %percentile 716.17 %percentile 661.50 %percentile 47748 mg/kgpercentile 360.743 %percentile 24620 mg/kgpercentile 213,629 mg/kgpercentile 18Further elements (barium, strontium, lithium, rubidium, zirconium, yttrium, cerium, boron, beryllium, gallium)
40.9 mg/kgpercentile 89102 mg/kgpercentile 80160 mg/kgpercentile 7030.3 mg/kgpercentile 6463.9 mg/kgpercentile 60467 mg/kgpercentile 6014.1 mg/kgpercentile 501.35 mg/kgpercentile 4654.4 mg/kgpercentile 33220 mg/kgpercentile 9Natural radioactivity and radon
Gamma radiation dose rate
Radon risk of the bedrock
2.62 ppm57th percentile7.06 ppm38th percentile1.26 %percentile 333,670 Bq/m²percentile 92Radon risk by isopleths
Geophysical fields: magnetics and gravity
Magnetic anomaly
Bouguer gravity anomaly
Geothermal potential
Rock temperature with depth
Geothermal groundwater bodies beneath the water line
Relief, climate and soils
Climatic-geographical types
Susceptibility of soils to acidification
Soil contamination (map 1:500,000)
Lithogeochemical types
Map of the corridor
Trace elements in surface waters
Major ions, mineralisation and pH
Groundwater: chemistry, water types and radioactivity
Chemical water types nearby
Water quality class according to the hydrogeochemical map
Metals in groundwater
Radon in waters
Type of site Samples Highest radon Median well 2 2,31 Bq/l 2.26 Bq/l free-flowing borehole with thermal and mineral water 1 10,3 Bq/l 10.3 Bq/l Boreholes and Geofond archive reports
Borehole depths
Nearest boreholes
Site Type Depth Archive report From the water Mácov monitoring borehole 6.8 m 73299 1Ac38.pdf110 m 2069 engineering-geological 23.0 m 12240300 m 1542 hydrogeological 16.2 m 12240300 m s.č.25 engineering-geological 15.0 m 1449320 m Martovce borehole with thermal water, mineral water 82.0 m 16399 1Ac10.pdf340 m 1514 hydrogeological 20.0 m 12240430 m Martovce narrow-diameter borehole with ordinary drinking and process water 35.0 m 16399 1Ac9.pdf500 m 2056 engineering-geological 25.0 m 12240820 m 1028 hydrogeological 16.5 m 12240880 m MZ-8 engineering-geological 2.5 m 12243890 m MZ-7 engineering-geological 3.0 m 12243890 m MZ-6 engineering-geological 3.0 m 12243910 m Geothermal energy and mineral waters
Borehole Temperature Yield Depth Chemical water type Use From the water Kolárovo – K-4 – 0.3 l/s 2665 m 4.8 km Želiezovce – HGŽ-3 52 °C – 916 m Na-SO4-Cl unused 6.2 km Svätý Peter – PGT-11 50 °C 6.0 l/s 1856 m Na-Cl unused 6.2 km Kolárovo – K-1 42 °C 0.8 l/s 3125 m 7.0 km Nesvady – GN-1 60 °C 2.7 l/s 1505 m Na-HCO3 unused 7.7 km Kolárovo (Nesvady) – K-3 65 °C 1.5 l/s 2834 m unused 8.0 km Komárno – Nová Stráž – FGK-1 64 °C 3.3 l/s 1970 m Ca-Na-Mg-SO4-Cl unused 9.8 km Komárno – Nová Stráž – FGK-1 45 °C 4.0 l/s 1970 m Na-HCO3-Cl unused 9.8 km Kolárovo – K-2 – 1.0 l/s 3135 m 9.9 km Sources of geothermal and mineral waters
Source Type Water temperature (°C) Yield (l/s) Count Nearest from water category e1 mineral water 56-80 < 5 1 6.6 km category c1 mineral water 23-38 < 5 1 7.5 km category a1 mineral water < 15 < 5 1 7.8 km FGK-1 geothermal water 38 – 55 < 5 1 8.6 km M-1,2,3 geothermal water 38 – 55 < 5 1 9.9 km category Komárno thermal baths – – 1 10.0 km How to read these data
Organizations and location
Organizations on the watercoursewho manages the fishing districts and what the conditions are there today
More watercourses nearby
31from 100
1445fishing districts
Map color
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lowerhigher
Cations (positive ions)
Anions (negative ions)
LeadPbextreme (top 1 %)
highest 11.0 μg/lmedian 2.50 μg/l4 samples75 % below the limit of quantification
CadmiumCdhigh (top 5 %)
highest 0.800 μg/lmedian 0.550 μg/l4 samples25 % below the limit of quantification
BariumBaslightly elevated
highest 88.0 μg/lmedian 80.5 μg/l4 samples
CopperCuslightly elevated
highest 3.00 μg/lmedian 2.00 μg/l4 samples25 % below the limit of quantification
ArsenicAsslightly elevated
highest 2.00 μg/lmedian 2.00 μg/l4 samples25 % below the limit of quantification
SeleniumSebelow half of Slovakia
highest 0.500 μg/lmedian 0.500 μg/l4 samples100 % below the limit of quantification
LithiumLibelow half of Slovakia
highest 5.00 μg/lmedian 5.00 μg/l4 samples100 % below the limit of quantification
ChromiumCrbelow half of Slovakia
highest 1.00 μg/lmedian 1.00 μg/l4 samples100 % below the limit of quantification
Silicon dioxideSiO2slightly elevated
highest 21.9 mg/lmedian 18.2 mg/l4 samples
ArsenicAshigh (top 5 %)
highest 9.50 μg/lmedian 0.500 μg/l9 samples67 % below the limit of quantification
ZincZnhigh (top 5 %)
highest 1,450 μg/lmedian 238 μg/l9 samples
AntimonySbhigh (top 5 %)
highest 0.900 μg/lmedian 0.100 μg/l9 samples78 % below the limit of quantification
LithiumLielevated (top 10 %)
highest 43.0 μg/lmedian 17.0 μg/l9 samples
SeleniumSeslightly elevated
highest 1.60 μg/lmedian 0.500 μg/l9 samples89 % below the limit of quantification
CopperCuslightly elevated
highest 3.30 μg/lmedian 1.10 μg/l9 samples
AluminiumAlslightly elevated
highest 0.0100 mg/lmedian 0.00500 mg/l9 samples78 % below the limit of quantification
ChromiumCrtypical value
highest 0.500 μg/lmedian 0.250 μg/l9 samples89 % below the limit of quantification
IronFetypical value
highest 0.00500 mg/lmedian 0.00500 mg/l5 samples100 % below the limit of quantification
CadmiumCdbelow half of Slovakia
highest 0.250 μg/lmedian 0.250 μg/l9 samples100 % below the limit of quantification
MercuryHgbelow half of Slovakia
highest 0.100 μg/lmedian 0.100 μg/l9 samples100 % below the limit of quantification
LeadPbbelow half of Slovakia
highest 0.500 μg/lmedian 0.500 μg/l9 samples100 % below the limit of quantification
