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The layer presents modelled extent of high hazard areas, both river hazard and rainfall hazard, in a 500-year ARI flood |
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The layer presents modelled extent of high hazard areas, both river hazard and rainfall hazard, in a 500-year ARI flood |
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5000 |
| typeKeywords:
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[] |
| description:
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<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN><SPAN>Rule used to identify high hazard areas:</SPAN></SPAN></P><P /><P><SPAN><SPAN>Either: </SPAN></SPAN></P><P><SPAN><SPAN>- the water depth is greater than 1 m, or</SPAN></SPAN></P><P><SPAN><SPAN>- the water depth (in metres) x the water velocity (in metres per second) is equal to or greater than 1.</SPAN></SPAN></P><P /><P><SPAN><SPAN>High rainfall hazard areas were identified using the two raster: SD_500_8p5_WD (depth) and SD_500_8p5_HZ (depth*velocity)(Location: </SPAN></SPAN><A href="\sdcgisdata\ArcGIS 10.9.1 SD\Feature\geodatabases\DHI_RainOnGrid.gdb" STYLE="text-decoration:underline;"><SPAN STYLE="text-decoration:underline;"><SPAN>ArcGIS 10.9.1 SD\Feature\geodatabases\DHI_RainOnGrid.gdb</SPAN></SPAN></A><SPAN><SPAN>; Source: DHI New Zealand) </SPAN></SPAN></P><P /><P /><P><SPAN><SPAN>High river hazard areas were identified using the two raster: FINAL_500yr_ARI_Q_1000cumecs_MAX_VEL0.asc (depth) and </SPAN></SPAN></P><P><SPAN><SPAN>FINAL_500yr_ARI_Q_1000cumecs_MAX_DEP0.asc (velocity) (Location: Flood 200yr_500yr\Additional Data_SelwynRiver_ECan\FINAL_500yr_ARI_Q_1000cumecs; Source: ECAN)</SPAN></SPAN></P><P /><P><SPAN><SPAN>More information can be found at: https://apps.canterburymaps.govt.nz/SelwynNaturalHazards/</SPAN></SPAN></P><P><SPAN><SPAN>or the following reports: </SPAN></SPAN><A href="https://www.ecan.govt.nz/data/document-library/?Search=PU1C%2F8608" STYLE="text-decoration:underline;"><SPAN STYLE="text-decoration:underline;"><SPAN>Selwyn River / Waikirikiri Floodplain Investigation</SPAN></SPAN></A><SPAN><SPAN> and </SPAN></SPAN><A href="https://www.selwyn.govt.nz/__data/assets/pdf_file/0014/324131/DHI-Regional-Policy-Statement-Modelling.pdf" STYLE="text-decoration:underline;"><SPAN STYLE="text-decoration:underline;"><SPAN>DHI Water and Environment Ltd report – Regional Policy Statement Modelling for SDC – District Plan</SPAN></SPAN></A></P><P /></DIV></DIV></DIV> |
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| title:
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High Flood Hazard Areas |
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| tags:
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["River hazard","Rainfall hazard","flood hazard","flood model","500-year ARI flood"] |
| culture:
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en-NZ |
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| minScale:
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150000000 |
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