HYDROGEOLOGICAL CONDITIONS OF LISTVYANKA SETTLEMENT
S. V. ALEKSEEV1, L. P. ALEKSEEVA2, V. R. ALEKSEEV3, A. M. KONONOV1, P. A. SHOLOKHOV2
a:2:{s:4:"TYPE";s:4:"HTML";s:4:"TEXT";s:358:"1Irkutsk Scientific Center SB RAS, 664033, Irkutsk, Lermontova str., 134, Russia
salex@crust.irk.ru
2Institute of Earth’s Crust SB RAS, 664033, Irkutsk, Lermontova str., 128, Russia
lalex@crust.irk.ru
3V. B. Sochava Institute of Geography SB RAS, 664033, Irkutsk, Ulan-Batorskaya str., 1, Russia
snow@irk.ru";}
Keywords: подземные воды, водоносные комплексы, химический состав воды, дебит источника, мно го лет немерзлые породы, underground water, aquifers, water chemical composition, spring output (yield of water supply source), permafrost
Subsection: Research in the Baikal watershed
Abstract
Some material and data on the aquifer system in the vicinity of Listvyanka municipality are provided, along with stratifica tion of hydrogeological section of the key site - Krestovaya valley. Listvyanka settlement is situated at the joint of the Irkutsk artesian basin and Baikal mountain-folded hydrogeological region. The peculiar hydrogeological conditions are caused by a combination of the environmental factors: the composition and jointing of water-bearing rocks, height above the Baikal level, position of the valley channels, and permafrost distribution. Fissure, fissure-formation, pore-fissure and pore-formation under ground waters occur in crystalline and fine-grained deposits. They are calcium or magnesium hydrocarbonate in chemical composition with salinity not exceeding 0,5 g/L. Atmospheric precipitation is the main source of underground water recharge. Lake Baikal drains the underground waters as evidenced by their table which is inclined in its direction. The underground waters recharging the Baikal do not disturb the chemical stability of its water body owing to their low salinity, and chemical composition similar to that of the Baikal water. Permafrost is found in the form of small islands under swamps in the valley floors. The permafrost thickness is 15-30 m at most. In severe and dry winter the permafrost can barrage the groundwater flow and prompt the icing formation.
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