TECHNOGENIC CHANGES IN THE GROUND WATER REGIME IN THE BUILT-UP AREAS (GEOECOLOGICAL, ENGINEERING GEOLOGICAL AND HYDROGEOLOGICAL ASPECTS)  

V.V. Funikova ^{1, *}, I. V. Dudler ^{2. **}, R. T. Butaev ^{3, ***}

¹Geological Faculty, Lomonosov Moscow State University,
Leninskie Gory 1, Moscow,119234 Russia

²Scientific Council RAS on the problems in environmental geoscience, engineering geology and hydrogeology, Ulanskii per., 13, str. 2, Moscow,101000 Russia

³Alterkasa LLC, Moscow, 1st Truzhnikov per., 17 A, 119121Russia

*E-mail: funikova@geol.msu.ru;
**E-mail: div-33@yandex.ru;
***E-mail: butaev.r.t@gmail.com

The groundwater regime changes permanently under technogenic impact in the built-up areas, with groundwater being the most dynamic component of the geological environment. Attention is drawn to the complex changes in groundwater regime, resulting in a number of undesired geoecological, engineering geological and hydrogeological consequences, which control the difficulty of engineering geological conditions for construction. We assume certain cycles in technogenic changes in the groundwater regime and the geological environment as a whole, complying with the technological progress and the urban development level. The article covers briefly the surface subsidence in megacities typical for the XX and early XXI centuries caused by intense and long-term water intake for drinking and technical water supply. The importance of long-term predicting technogenic changes in the groundwater regime is emphasized, in particular, long-term flooding forecasts in Moscow. The special importance of monitoring and control over the vertical filtration gradient in built-up areas with a potential karst-suffosion hazard is shown. It is proposed to include a map of vertical filtration gradients in the set of hydrogeological maps for engineering survey. In conclusion, the need for a systematic approach to the study and consideration of technogenic changes in the groundwater regime is noted, including the arrangement of hydrogeological monitoring; inclusion of the vertical filtration gradient map in the set of hydrogeological maps; compilation of hydrogeological models of the city and its municipal districts, as well as especially hazardous and technologically complex engineering structures (based on mathematical, analogue and physical modeling); and long-term forecasting.

Keywords: groundwater, technogenic changes in the groundwater regime; geoecological, engineering geological and hydrogeological aspects

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