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Regionalisierung der Durchlässigkeitsbeiwerte mit unscharfen (fuzzy) Zahlen: Der Natur näher?
- Piotrowski, Jan A., Bartels, Frank, Salski, Arkadiusz, Schmidt, Gunther
- Grundwasser 1997 v.2 no.1 pp. 3-10
- aquifers, data collection, expert opinion, geostatistics, Germany
- This article demonstrates an application of fuzzy geostatistics in spatial regionalization of imprecise hydrogeological data. The regionalization was carried out for hydraulic condictivity values of a major aquifer in northwestern Germany. The original data set consists of 557 borehole points with known (crisp) hydraulic conductivities. This data set was supplemented by 30 additional data points, placed in areas with lowest borehole density. At these points, hydraulic conductivities were estimated based on subjective expert knowledge of regional geology, and entered the regionalization procedure as fuzzy (imprecise) numbers. By utilizing the expert knowledge, which cannot be implemented in conventional geostatistics, the reliability of regionalization has been improved. The imprecision of fuzzy-regionalization is fully quantifiable, so that it can be easily accounted for when evaluating the results.