Charts of point levels of total zinc measured on RMQS, Campaign 1 (2001-2009)
Description
The Network of Soil Quality Measures (RMQS) is a national program for assessing and monitoring long-term soil quality in France. This network is based on the monitoring of 2240 sites representative of French soils and their occupations, spread over the entire French territory (metropolicy and overseas) according to a systematic grid of 16 km side. The sites cover various occupations (large crops, permanent grasslands, forests, vineyards and orchards, low-anthropised habitats, urban parks). Physical, chemical and biological properties of soils are measured at each site at a frequency of about fifteen years. These analyses are associated with the investigation of factors explaining spatial and temporal variability in soil properties (biophysical variables, sources of contamination, occupancy history and site management practices). The first sampling campaign in metropolitan France took place from 2000 to 2009. The campaign focused on soil contamination and mapped the main soil parameters (28 variables) as well as the 12 metal trace elements (MEEs) in total or partial extraction and 70 persistent organic pollutants. All the sampling protocols, measurements and observations made at each site during this campaign are detailed in the 2006 Soil Quality Measurement Network Manual.
Obtaining values:
The maps produced are based on the results of analyses of 2146 metropolis sites, spread over 2146 cells, implemented during the first RMQS campaign (2000-2009). Analyses were carried out on composite samples taken at the bull using 2 layers of samples (0-30 cm or thickness of the layer worked in cultivated soil called surface composite or composite 1 and the underlying layer up to 50 cm, called subsurface composite or composite 2). Each composite sample was made from a mixture of 25 individual samples taken from a 400 m² sampling area using a stratified random sampling plan (see description in the QSR Manual 2006). A third layer of collection from composite samples could be formed in forest or grassland, from the holorganic horizons (corresponding to the OF and OH soil horizons) when these horizons were sufficiently thick (at least 1 cm) and continuous on the sampling surface.
Map charts are a geographical representation of the actual levels (concentration in unit of measurement per mass of air dried soil) measured for the parameter mentioned, at each point of the Network of Soil Quality Measurements (RMQS), during the first campaign (2000-2009). The soil analyses were carried out by the Soil Analysis Laboratory of the INRA d’Arras during the campaign, from 2002 to 2011, as the network rolled out, and for certain parameters, a posteriori, on the samples stored at the European Soil Conservatory.
The charts have not been compiled with the actual coordinates of the sampling devices, in accordance with the legal framework currently in force and to meet our commitment to anonymisation of the data. The dataset provided associated with these charts will include the centre coordinates of the mesh, known as centroid coordinates or theoretical coordinates.
A metadata table associated with the dataset (accessible via the links below) details for each parameter represented, the analytical method, the unit, the detection threshold, and the analytical uncertainty associated with the analysis provided by the LAS.
Resources
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Tags
- etm
- zinc
- france
- cartogrammes
- zn
- element-trace
- rmqs
- propriétés-des-sols
- zinc-total