LRIS Portal :: tag:lris.scinfo.org.nz,2008-10:feed:data:mapstream=40007:category=291005:sort=rLandcare Researchhttps://lris.scinfo.org.nz//PBC - Predicted Background Soil Concentrations, New Zealand (H3 resolution 9)tag:lris.scinfo.org.nz,2023-08:layers:1142812023-08-15T22:29:20.629963+00:002023-08-15T22:22:49.514632+00:00
<a class="kxThumbnail" href="https://lris.scinfo.org.nz/layer/114281-pbc-predicted-background-soil-concentrations-new-zealand-h3-resolution-9/" title="Details for PBC - Predicted Background Soil Concentrations, New Zealand (H3 resolution 9)"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=114281.389178,style=auto/90x70.png" alt="PBC - Predicted Background Soil Concentrations, New Zealand (H3 resolution 9) thumbnail"/></a><br />
<br /><strong>Updated with new data on 15 Aug 2023</strong><br />
<p>Discover the Trace Element Explorer here:</p>
<p><a href="https://experience.arcgis.com/experience/4e6e25842cc6427ca850bdf644010922/">experience.arcgis.com/experience/4e6e25842cc6427ca...</a></p>
<p>The Predicted Background Trace Element shapefile contains spatial information on predicted background concentrations of selected naturally occurring trace elements - arsenic, boron, cadmium, chromium, copper, lead, nickel and zinc – across New Zealand. These concentrations were developed through statistical modelling using over 2000 data points to assess the influence of land use and three explanatory data layers – parent material, soil order and land environments of New Zealand (level 1 categories) – on the concentration of the key trace elements. From this model, estimates of the rural ambient (background) concentrations (i.e., inclusive of sites where anthropogenic activities may occur although there is expected to be minimal anthropogenic additions of trace elements to the soil and no difference from true, naturally occurring concentrations) across New Zealand were made, providing a nationally consistent approach to determining background concentrations. The predicted concentrations are displayed as filled contour plots to enable visualisation of the variation in concentrations across the country. Specifically, the median, 90th, 95th, and 99th percentile of the predicted concentrations are used as the ‘cut-offs’ for concentrations within different locations. Areas identified as being at or above the 95th percentile of predicted concentrations are considered to be areas that may contain naturally elevated concentrations that may also vary significantly at smaller scales than captured in the current study, and may warrant site-specific investigations to better determine background concentrations. These data are intended to provide an assessment of background soil concentrations at locations that are being assessed for use as clean-fills, for the assessment of contaminated land or the development of site-specific ecological soil guideline values.</p>
From: <a href="https://lris.scinfo.org.nz/group/lcr/" title="Profile for Landcare Research Limited">Landcare Research Limited</a><br />
Added: 15 Aug 2023<br />
Updated: 15 Aug 2023<br />
PBC - Predicted Background Soil Concentrations, New Zealand (Deprecated)tag:lris.scinfo.org.nz,2016-06:layers:484702016-06-20T00:46:12.573034+00:002016-06-28T22:01:06.049233+00:00
<a class="kxThumbnail" href="https://lris.scinfo.org.nz/layer/48470-pbc-predicted-background-soil-concentrations-new-zealand-deprecated/" title="Details for PBC - Predicted Background Soil Concentrations, New Zealand (Deprecated)"><img src="//tiles-cdn.koordinates.com/services/tiles/v4/thumbnail/layer=48470.60475,style=auto/90x70.png" alt="PBC - Predicted Background Soil Concentrations, New Zealand (Deprecated) thumbnail"/></a><br />
<br /><strong>Updated with new data on 28 Jun 2016</strong><br />
<p><em><strong>DEPRECATED</strong></em></p>
<p><strong>New layer can be found: <a href="https://lris.scinfo.org.nz/layer/114281-pbc-predicted-background-soil-concentrations-new-zealand-h3-resolution-9/">lris.scinfo.org.nz/layer/114281-pbc-predicted-back...</a></strong></p>
<p></p>
<p>The Predicted Background Concentration (PBC) shapefile contains spatial information on the effective median, and 95th quantile estimates of the background concentration (mg/kg) of arsenic, cadmium, chromium, copper, lead, nickel and zinc across New Zealand. These background concentrations were developed for a geological unit classification, Chemical4, originating from GNS Science's QMAP 1:250 000 Geological Map of New Zealand GIS dataset (Heron 2014). Chemical4 is based on the QMAP ROCK_GROUP classification but further subdivides some on an age basis ie older sedimentary rocks from their Miocene and younger rock and sediment equivalents (Maui and Pakihi supergroups, Mortimer et al. 2014). The number of samples in each Chemical4 subgroup for which predictions are made is also provided. Predictions for Chemical4 subgroups with few underlying samples (N<30) are considered less reliable and for N<10 unreliable. These data are intended to provide an initial assessment of background soil concentrations at locations that are being assessed for use as clean-fills or managed fill or for the assessment of contaminated land.</p>
<p>Source: These background soil concentration predictions were developed from geostatistical analysis of trace element data from regional councils, national soils database and GNS Science identifying associations with geological parameters adapted from the GNS Science QMAP geological map dataset. The premise being that underlying geology is generally regarded as a major contributor to the geochemical signals in soils and surficial material.</p>
<p>Full details of the development of these data is provided in 'Envirolink Report (C09X1402) 2015.pdf'. See 'PBC_FieldsDescription.xlsx' for a description of the fields in the attribute table.</p>
<p>References: Heron DW (custodian) 2014. Geological map of New Zealand 1:250,000. GNS Science geological map 1. Lower Hutt, New Zealand, GNS Science.</p>
<p>Mortimer N, Rattenbury MS, King PR, Bland KJ, Barrell DJA, Bache F, Begg JG, Campbell HJ, Cox SC, Crampton JS, Edbrooke SW, Forsyth PJ, Johnston MR, Jongens R, Lee J, Leonard GS, Raine JI, Skinner DNB, Timm C, Townsend DB, Tulloch AJ, Turnbull IM, Turnbull RE 2014. High-level stratigraphic scheme for New Zealand rocks. New Zealand Journal of Geology and Geophysics 57: 402–419.</p>
From: <a href="https://lris.scinfo.org.nz/group/lcr/" title="Profile for Landcare Research Limited">Landcare Research Limited</a><br />
Added: 20 Jun 2016<br />
Updated: 28 Jun 2016<br />
Envirolink Report (C09X1402) 2015tag:lris.scinfo.org.nz,2016-07:document:95302016-07-18T04:04:03.390735+00:00
From: <a href="https://lris.scinfo.org.nz/group/lcr/" title="Profile for Landcare Research Limited">Landcare Research Limited</a><br />
Added: 18 Jul 2016<br />
PBC Mapstag:lris.scinfo.org.nz,2016-06:document:95182016-06-23T02:07:39.686171+00:00
From: <a href="https://lris.scinfo.org.nz/group/lcr/" title="Profile for Landcare Research Limited">Landcare Research Limited</a><br />
Added: 23 Jun 2016<br />
PBC FieldsDescriptiontag:lris.scinfo.org.nz,2016-06:document:95172016-06-19T22:00:15.425174+00:00
From: <a href="https://lris.scinfo.org.nz/group/lcr/" title="Profile for Landcare Research Limited">Landcare Research Limited</a><br />
Added: 19 Jun 2016<br />