Abstract
In 2010-2012, the hydrogeological model (HM) of Latvia (LAMO) was developed by the scientists of Riga Technical University (RTU). LAMO comprises geological and hydrogeological data provided by the Latvian Environment, Geology and Meteorology Centre (LEGMC) for the active groundwater zone of Latvia. In 2013-2015, LAMO was notably upgraded. The number of HM layers and the density of hydrographical network (rivers, lakes) were increased, cuttings of river valleys into primary geological layers were done, plane approximation step was reduced twofold, transmissivity distributions of aquifers were refined by creating variable permeability maps. In the paper, new methods are described for obtaining more reliable permeability maps by using pumping data of wells. Computer-based checking of initial data for wells was accomplished, and some drawbacks of the former maps were eliminated.
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