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SM ISO690:2012 MORARU, Constantin, TIMOSHENKOVA, A.. Evaluation of spatial interpolation methods for groundwater: case study, the Republic of Moldova. In: Buletinul Institutului de Geologie şi Seismologie al AŞM, 2013, nr. 1, pp. 24-41. ISSN 1857-0046. |
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Buletinul Institutului de Geologie şi Seismologie al AŞM | ||||||
Numărul 1 / 2013 / ISSN 1857-0046 | ||||||
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Pag. 24-41 | ||||||
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In this case study the geostatistical analysis of digital hydrogeological map accuracy was carried out. Maps were modeled in isolines by means of different interpolators. The occurrence of groundwater levels was mapped on the representative area in limits of the Republic of Moldova. Using the software Surfer 11 eleven models of groundwater levels were generated by the following interpolators: Kriging, Radial Basis Function, Inverse Distance to a Power, Modified Shepard's, Minimum Curvature, Polynomial Regression, Triangulation with Linear Interpolation, Nearest Neighbor, Natural Neighbor, Moving Average and Local Polynomial. The comparability between maps was estimated applying methodology of the statistical residuals as the subtraction between Natural model –Artificial model and the absolute average value of the statistical residuals. Modified Shepard's method is defined as the most accurate interpolator. Nevertheless the correlation analysis shows that this interpolation method is very close with Kriging, Local Polynomial, Minimum Curvature, Natural Neighbor and Triangulation with Linear Interpolation (r> 0.70).
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