sp (version 1.2-3)

meuse: Meuse river data set

Description

This data set gives locations and topsoil heavy metal concentrations, along with a number of soil and landscape variablesat the observation locations, collected in a flood plain of the river Meuse, near the village of Stein (NL). Heavy metal concentrations are from composite samples of an area of approximately 15 m x 15 m.

Usage

data(meuse)

Format

This data frame contains the following columns:

x

a numeric vector; Easting (m) in Rijksdriehoek (RDH) (Netherlands topographical) map coordinates

y

a numeric vector; Northing (m) in RDH coordinates

cadmium

topsoil cadmium concentration, mg kg-1 soil ("ppm"); zero cadmium values in the original data set have been shifted to 0.2 (half the lowest non-zero value)

copper

topsoil copper concentration, mg kg-1 soil ("ppm")

lead

topsoil lead concentration, mg kg-1 soil ("ppm")

zinc

topsoil zinc concentration, mg kg-1 soil ("ppm")

elev

relative elevation above local river bed, m

dist

distance to the Meuse; obtained from the nearest cell in meuse.grid, which in turn was derived by a spread (spatial distance) GIS operation, horizontal precision 20 metres; then normalized to $[0,1]$

om

organic matter, kg (100 kg)-1 soil (percent)

ffreq

flooding frequency class: 1 = once in two years; 2 = once in ten years; 3 = one in 50 years

soil

soil type according to the 1:50 000 soil map of the Netherlands. 1 = Rd10A (Calcareous weakly-developed meadow soils, light sandy clay); 2 = Rd90C/VII (Non-calcareous weakly-developed meadow soils, heavy sandy clay to light clay); 3 = Bkd26/VII (Red Brick soil, fine-sandy, silty light clay)

lime

lime class: 0 = absent, 1 = present by field test with 5% HCl

landuse

landuse class: Aa Agriculture/unspecified = , Ab = Agr/sugar beetsm, Ag = Agr/small grains, Ah = Agr/??, Am = Agr/maize, B = woods, Bw = trees in pasture, DEN = ??, Fh = tall fruit trees, Fl = low fruit trees; Fw = fruit trees in pasture, Ga = home gardens, SPO = sport field, STA = stable yard, Tv = ?? , W = pasture

dist.m

distance to river Meuse in metres, as obtained during the field survey

References

M G J Rikken and R P G Van Rijn, 1993. Soil pollution with heavy metals - an inquiry into spatial variation, cost of mapping and the risk evaluation of copper, cadmium, lead and zinc in the floodplains of the Meuse west of Stein, the Netherlands. Doctoraalveldwerkverslag, Dept. of Physical Geography, Utrecht University

P.A. Burrough, R.A. McDonnell, 1998. Principles of Geographical Information Systems. Oxford University Press.

Stichting voor Bodemkartering (STIBOKA), 1970. Bodemkaart van Nederland : Blad 59 Peer, Blad 60 West en 60 Oost Sittard: schaal 1 : 50 000. Wageningen, STIBOKA.

http://www.gstat.org/

Examples

data(meuse)
summary(meuse)
coordinates(meuse) <- ~x+y
proj4string(meuse) <- CRS("+init=epsg:28992")

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