This dataset reports modelled mean annual suspended sediment load reduction required to meet suspended sediment attribute bottom lines in the NPS-FM 2020. Results are reported for the REC 2 river reach scale as well as at the “catchment pourpoint average” scale. The dataset includes masks for the DoC estate as well as glacial mountain source of flow.
During policy development, the Ministry for the Environment tested suspended sediment load reductions required to meet various potential attribute bottom lines. The information from February 2020 reflects the bottom lines in the NPS-FM 2020. For further information on this specific dataset, see “Hicks and Shankar 2020. Contract 23184 Task: Sediment load reductions to meet visual clarity bottom lines”. This report is available on the Ministry for the Environment’s publications website where it is listed as Technical Report 6.
For further information on the modelling, see Hicks et al. (2019) Sediment load reductions to meet suspended and deposited sediment thresholds. NIWA Client Report No. 2019100CH. Prepared for the Ministry for the Environment. This report is available here: www.mfe.govt.nz/publications/fresh-water/sediment-....
Note that the river segment and pour point catchment results provided in the 2019 dataset form the basis for the erosion and economic modelling assessment of proposed sediment attributes as reported in Neverman et al. (2019). Impact testing of a proposed suspended sediment attribute: identifying erosion and sediment control mitigations to meet proposed sediment attribute bottom lines and the costs and benefits of those mitigations. Maanaki Whenua Landcare Research Client Report. Prepared for the Ministry for the Environment.
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|1.||Data dictionary||434 KB||
|2.||deprecated 2019 river reach results||118 MB||zip||
|3.||deprecated 2019 extirpation threshold results||248 MB||zip||
|4.||deprecated 2019 catchment results||9.85 MB||zip||
|5.||Reach-level results for NPS-FM 2020 bottom lines||119 MB||zip||
|Tags||Sediment, deposited sediment, predicted reference state, predicted current state, boosted regression tree modelling|
|Data type||Vector multipolygon||Feature count||633|
|Attributes||label, MAX_label, OID, pour_point, order, ave_r, pc_contr_c, pc_areaCon, area, doc_overla, pc_ovlap|
|Services||Vector Query API, Web Feature Service (WFS), Catalog Service (CS-W)|
|Added||14 Aug 2019|
|Last updated||3 Jun 2020|
|Revisions||4 - Browse all revisions|
|Current revision||Imported on June 3, 2020 from Shapefile in NZGD2000 / New Zealand Transverse Mercator 2000. 43 geometries modified to be OGC compliant. Changelog.|
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