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Berlin Environmental Atlas

02.12 Groundwater Levels of the Main Aquifer and Panke Valley Aquifer (Edition 2005)

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Methodology

The groundwater isolines of the main aquifer as well as the Panke Valley aquifers were calculated using a interpolation method (point-Kriging). To get informations about the interrelation between the measuring points, concerning their spacial distribution and groundwater level, first data were analysed by Variogramm-analysis.

The geo-statistical parameter determined by the Variogramm-analysis for the main groundwater aquifer and the Panke Valley aquifer are listed in Table 1.

Tab. 1: Interpolation inputs for the Kriging proceeding
geo-statistical parameter main aquifer Panke Valley aquifer
easting Soldner (Min / Max) -5600 / 56800 22000 / 35000
northing Soldner (Min / Max) -3200 / 48000 25000 / 38000
Spacing 400 400
Number of grid-lines x = 157 / y = 129 x = 34 / y = 34
Variogramm-model linear linear
Slope 0.00109 0.001615
Ratio 2 2
Angle 141.4 128.6
Kriging-Type Point Point
Drift-Typ none none
Interpolation-typ linear linear
Number of sectors 4 no search (use of all data)
Max. number of data from all sectors 128 no search (use of all data)
Max. number of data per sector 32 no search (use of all data)
Min. number of data in the research area 2 no search (use of all data)
Number of max. free sectors 3 no search (use of all data)
search elipse radius R1=10000 / R2=5000 no search (use of all data)
search elipse angle 141.4 no search (use of all data)
Tab. 1: Interpolation inputs for the Kriging proceeding

For the calculation of the groundwater isolines of the main aquifer, the irregularly distributed groundwater measurement data (base points) were transformed into an equidistant grid with the aid of a program for the calculation and graphic representation of surfaces (Surfers 8.0, by Golden Software). This was accomplished by interpolation according to the Kriging method. The groundwater isolines were represented on the basis of this grid, after smoothing.

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