The hydrogeological characteristics of the “Tosnenskoe” groundwater deposit is presented. The geological structure, hydrochemical and hydrogeological conditions of the deposit, approaches to the assessment and prediction of operational groundwater reserves by numerical modeling using the Modflow program are considered. Despite the fact that as a result of modeling groundwater reserves of 8600 m 3 / day are provided for the entire projected period of time, it is recommended to continue hydrogeological observations of the fields. It is necessary to build a multilayer numerical model to determine those factors, which were not considered in the presented model.
