| snippet:
|
This layer contains information on the estimated cumulative discharge of phosphorus to land (in kilograms per year) from onsite wastewater management systems within river catchments in Waitaha Canterbury. The estimates were generated in 2025 by PHF Science. |
| summary:
|
This layer contains information on the estimated cumulative discharge of phosphorus to land (in kilograms per year) from onsite wastewater management systems within river catchments in Waitaha Canterbury. The estimates were generated in 2025 by PHF Science. |
| accessInformation:
|
PHF Science |
| thumbnail:
|
|
| maxScale:
|
5000 |
| typeKeywords:
|
[] |
| description:
|
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN STYLE="font-size:12pt">PHF Science estimated the Total </SPAN><SPAN STYLE="font-size:12pt">Phosphorus</SPAN><SPAN STYLE="font-size:12pt"> loading from OWMS discharges in each </SPAN><SPAN STYLE="font-size:12pt">catchment</SPAN><SPAN STYLE="font-size:12pt"> using mapped OWMS locations (for consented and estimated OWMS) and applying assumptions from measured </SPAN><SPAN STYLE="font-size:12pt">phosphorus </SPAN><SPAN STYLE="font-size:12pt">concentrations in wastewater</SPAN><SPAN STYLE="font-size:12pt">. Further details are documented in the PHF Science Report "report "</SPAN><SPAN STYLE="font-style:italic;font-size:12pt">Estimating onsite wastewater densities and their associated Total Nitrogen and Total Phosphorus mass loading rates across Waitaha Canterbury</SPAN><SPAN STYLE="font-size:12pt">" by Qui and Humphries, February 2026. </SPAN></P></DIV></DIV></DIV> |
| licenseInfo:
|
<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN STYLE="font-size:12pt">Phosphorus</SPAN><SPAN STYLE="font-size:12pt"> loading estimates are</SPAN><SPAN STYLE="font-size:12pt"> based on consented and estimated OWMS locations which were generated by a desktop analysis in 2025 and have not been verified in the field. This layer is not updated automatically when OWMS are consented, installed or decommissioned. </SPAN><SPAN STYLE="font-size:12pt">Details on the </SPAN><SPAN STYLE="font-size:12pt">river catchments </SPAN><SPAN STYLE="font-size:12pt">were captured from Environment Canterbury data at the time of analysis. </SPAN><SPAN STYLE="font-size:12pt">Estimates represent the </SPAN><SPAN STYLE="font-size:12pt">phosphorus</SPAN><SPAN STYLE="font-size:12pt"> APPLIED</SPAN><SPAN STYLE="font-size:12pt"> to land with</SPAN><SPAN STYLE="font-size:12pt"> the wastewater</SPAN><SPAN STYLE="font-size:12pt"> do </SPAN><SPAN STYLE="font-size:12pt">not </SPAN><SPAN STYLE="font-size:12pt">represent </SPAN><SPAN STYLE="font-size:12pt">the </SPAN><SPAN STYLE="font-size:12pt">phosphorus</SPAN><SPAN STYLE="font-size:12pt"> </SPAN><SPAN STYLE="font-size:12pt">load reaching the streams because </SPAN><SPAN STYLE="font-size:12pt">do not account for any attenuation in the receiving environment. </SPAN><SPAN STYLE="font-size:12pt">Please see the full PHF Science report for further assumptions and limitations. </SPAN></P></DIV></DIV></DIV> |
| catalogPath:
|
|
| title:
|
Estimated phosphorus loading from OWMS in river catchments |
| type:
|
|
| url:
|
|
| tags:
|
["OWMS","onsite wastewater management systems","onsite wastewater","phosphorus loading","Phosphorus","nutrients"] |
| culture:
|
en-NZ |
| portalUrl:
|
|
| name:
|
|
| guid:
|
|
| minScale:
|
5000000 |
| spatialReference:
|
|