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| Web-based viewer (freely available) | Delta Data Viewer (for registered users) |
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Examples
Hotspot in the Elsener brook On February 14th 2017 a routing was done in the Elsener brook, West of Rijssen. In the main brook itself no very high Nitrate concentrations were found. Also, most contributing ditches showed low concentrations. One farm ditch however, appeared to have much higher nitrate concentrations compared to the other ditches. This ditch drained a small sub catchment with a couple of farms, which probably caused the high nitrate concentrations.
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| 1 | Route of effluent from the sewage treatment facility in Zeist via Bunnik and the Kromme Rijn River to Utrecht Search for the source of the highest high nitrate concentrations at the measurement location at the bottom left in October 2016 (the bottom left). The Nitrate app is used to find the source and the route of the sewage treatment plant (STP) discharged through Zeist (green arrow) via Bunnik to the Kromme Rijn River.
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| 3 | Nature en glasshouse horticulture in Delfgauw On December 22th 2016, a Nitrate App routing was done in Delfgauw in the West of The Netherlands. High nitrate concentrations were found in the ditches around the glasshouses. Low nitrate concentrations were measured in the rest of the catchment, which is a nature reserve. The map with the nitrate measurements convinced the representative of the glasshouse owners that the high nitrate concentrations in the area were not caused by the birds in the nature reserve.
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| 4 | Manure processing factory largest Nitrate source in the Zeegserloop brook. On January 31th, a Nitrate App routing was done in the agricultural Zeegserloop catchment. The nitrate concentrations exceeded 10 mg/l NO3-N at many locations throughout the catchment. A clear nitrate hotspot was found in Eisenbroeken, the area around the two red dots in the North Western part of the catchment. The source of the high nitrate concentration was a manure processing installation.
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| 5 | Hotspot at a manure processing installation in the Veldbeek catchment On february 7th 2017, a Nitrate app routing was done in the Veldbeek catchment in the middle of the Netherlands. The highest nitrate concentrations were measured at the tree red dots just at the loweleft edge of the legend. This nitrate hotspot can possibly be related to an agricultural service provider with a manure processing installation.
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| 6 | Hooge Raam catchment On February 21st 2017 a Nitrate App routing was done in the Hooge Raam catchment. The nitrate concentrations were generally higher than in a previous routing in dryer conditions on November 25th 2016 . The highest concentrations were found in the effluent of a controlled subsurface drainage system.
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