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A GIS-based high-resolution digital river network (DRN) representing stream network within each of the 13 Freshwater Management Units (FMU) across the Northland region. The DRN has been produced by conducting catchment and drainage line analysis on a “hydrologically-enforced” digital elevation model (HE-DEM) at 2ha and 0.2 ha flow accumulation thresholds. The HE-DEM was produced by ‘burning’ of hydraulic blockages on DEM produced from 1m regional LiDAR, which ensured the waterways follow their correct natural path as often as possible. A suite of attributes has been added into the DRN GIS layers to make them useful for a range of analysis and modelling purposes in Northland. |
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A GIS-based high-resolution digital river network (DRN) representing stream network within each of the 13 Freshwater Management Units (FMU) across the Northland region. The DRN has been produced by conducting catchment and drainage line analysis on a “hydrologically-enforced” digital elevation model (HE-DEM) at 2ha and 0.2 ha flow accumulation thresholds. The HE-DEM was produced by ‘burning’ of hydraulic blockages on DEM produced from 1m regional LiDAR, which ensured the waterways follow their correct natural path as often as possible. A suite of attributes has been added into the DRN GIS layers to make them useful for a range of analysis and modelling purposes in Northland. |
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Northland Regional Council , Water Technology NZ (Limited) |
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5000 |
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<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN /></P><P STYLE="text-align:Justify;"><SPAN>This GIS layer is a vector dataset (polylines) representing stream network at 0.2ha flow accumulation threshold (i.e., 0.2ha is the minimum size of a headwater catchment), which comprises individual stream segments with unique IDs. It was produced by splitting a stream definition raster (developed from a 1m flow accumulation raster) at each stream intersection. Each stream segment represents the catchment delineated at 0.2ha flow accumulation threshold, which drains that area. </SPAN></P><P><SPAN STYLE="font-weight:bold;text-decoration:underline;">Detailed Methodology report describing the dataset</SPAN></P><P><SPAN>https://www.nrc.govt.nz/resource-library-summary/research-and-reports/rivers-and-streams/high-resolution-digital-river-network-for-northland/ </SPAN></P><P><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN STYLE="font-weight:bold;text-decoration:underline;"><SPAN>Other Details (SDE):</SPAN></SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>Map Name: Digital River Network (DRN) - Watershed and StreamLine (0.2 ha)</SPAN></SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>Name of the feature in sde: nrc.GISADMIN.DRN_BaysofIsland_StreamLine</SPAN></SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN /><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN /><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>Published By: Divya S Data Provided By: Manas Chakraborty (Resource Scientist- Freshwater, NRC)</SPAN></SPAN></P><P><SPAN /></P><P><SPAN /></P><P><SPAN /></P></DIV></DIV></DIV> |
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BaysofIsland Stream Line (0.2 ha) |
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["FMU","Digital River Network","DRN","NRC","Northland Regional Council","BaysofIsland Stream Line","0.2 ha"] |
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en-US |
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625000 |
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