[Hydrogeodinamic conditions of the river Vedrich drainage basin as a factor of underground water protection from the surface sources of contamination]
2005
Zabarovskaya, G.V. | Kovaleva, A.V.(Gomel State Univ. (Belarus))
The main regularities of the underground water motion in the zone of intensive waterchange of the river Vedrich basin were studied. According to the results of the geofilration and geomigration numerical modeling, a set of specialized maps has been created. The horizontal velocity of subterranean and interstratal waters as well as lateral filtation flow extension (along the rock stratification) that characterizes relative intensity of vertical and horizontal water circulation in stratified system ar considered as a vulnerability factor of these waters. According to the intensity of interstratal waterchange and the extension of the lateral filtration flows in the river Vedrich basin, two hydrodynamic subzones were singled out: the upper and the lower one. in the upper hydrodynamic subzone all aquifers have direct hydraulic links with the present-day surface and the vertical water filtration prevails greatly over the horizontal one. This subzone includes subterranean, Early Middle Pleistocene and Paleogene aquifers. The lateral flow extension of subterranean aquifer does not exceed 500 meters and increases up to 1-5km only in the river Vedrich valley. The lower hydrodynamic subzone consist of Turon-Maastrich and Jurassic-Early Cenomanian aquifers separated from the present-day surface by several weakly permeable layers. Their kateral flow extension reaches 30 km and increase up to 100 km and more at the ascending and descending filtration borders. To confirm the noted peculiarities of the underground water flow structure and set the regulariyies of the pollution migration in the zone of intensive waterchange of the river Vedrich basin the numeral modeling of pollution migration in underground waters has been carried out. The obtained regularities of the underground waters motion in the zone of intensive waterchange of the river Vedrich basin are of great importance for the estimation of the subterranean and interstratal water vulnerability. The created set of maps of velocity and extension of the lateral underground water flows can be used for choosing the places for industrial waste storage under the given level of influence on the underground waters
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