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Predicted groundwater total oxidised nitrogen (TON) concentrations within the Groundwater Management Zones (GWMZ) of the Southland Region. |
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Predicted groundwater total oxidised nitrogen (TON) concentrations within the Groundwater Management Zones (GWMZ) of the Southland Region. |
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Ton Snelder
Monique Beyer
Brydon Hughes
Ewen Rodway |
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5000 |
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<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>The map was derived using measured TON data as this was the</SPAN><SPAN /><SPAN>most spatially and temporally complete dataset. In Southland TON and nitrate-nitrogen (NO3-</SPAN><SPAN /><SPAN>N) are generally equivalent and comparable because NO3-N makes up the majority of TON in</SPAN><SPAN /><SPAN>most groundwaters. On this basis TON is used as a proxy for NO3-N concentration. An</SPAN><SPAN /><SPAN>understanding of how concentrations vary across the region is important to </SPAN><SPAN>E</SPAN><SPAN>nvironment</SPAN><SPAN /><SPAN>Southland (ES) because groundwater NO3-N potentially impacts on the supply of potable water</SPAN><SPAN /><SPAN>and on ecosystems.</SPAN><SPAN /></P></DIV></DIV></DIV> |
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<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>This map should not be used to undertake property scale assessments of groundwater contamination. The map provides a generalised indication of the broad (i.e. landscape-scale) variation in total oxidised nitrogen concentrations in shallow groundwater across Southland. There is a high degree of uncertainty at the scale of individual grid cells (and therefore at property or farm scale). To undertake any specific assessments, please request the most relevant data and contamination risk information from Environment Southland by emailing datarequest@es.govt.nz.</SPAN></P></DIV></DIV></DIV> |
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Estimated Total Oxidised Nitrogen Concentrations - 2017 |
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["Groundwater","Total oxidised nitrogen","TON","Nitrogen","Southland"] |
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en-NZ |
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150000000 |
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