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SM ISO690:2012 МЕЛЬНИЧУК, Орест, АРНАУТ, Николай, ŞVEŢ, V., ЖЕЛЯПОВА, Анна. Анализ причин и характеристик катастрофических наводнений в бассейнах рек Днестр и Прут
. In: Buletinul Institutului de Geologie şi Seismologie al AŞM, 2009, nr. 2, pp. 90-98. ISSN 1857-0046. |
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Buletinul Institutului de Geologie şi Seismologie al AŞM | ||||||
Numărul 2 / 2009 / ISSN 1857-0046 | ||||||
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Positioning of rivers Prut and Dniestr basins in the Carpat Mountains and particularities of
atmospheric precipitations are the main driving factors of flooding on these rivers. In this region
frequent heavy showers and intense density of river network leads to catastrophic flooding. It was
analyzed chronological frequency of flooding and their relationships with sun activity consider that
such anomaly phenomena are dependent from moisture atmospheric circulation and sun activity. We
disclosed that frequency of catastrophic flooding approximately is 2 time higher in the period of
elevation of sun activity. Years with such flooding coincides with 11 years sun activity cycles.
Comparative analysis of flooding during the last 28 years shows that most intensive was
flooding from July – August 2008. Appearance of this flooding was generated by heavy showers
from the first ( 100 – 240 mm) and second (100-390 mm) periods of July, which moisten the upper
part of rivers in the mountain part. As a result on the rivers Prut and Dnestr catastrophic flooding
waves were formed with range of fluctuation 7 – 8 m. The maximum debit of the Dnestr lake was
5680 m3/s and the volume of discharge riches 2,58 km3 ( in the period from July 24 till August 4).
Present study of the affluent regime and discharge of flooding water from Dnestrovsk and
Dubosari reservoirs shows that passing of maximum flooding wave was regulated by technical
devices of reservoirs. This is permit to avoid the catastrophic flooding lower of reservoirs, e.g.
location from Dnestrovsk reservoir to river Dnestr entry.
If a regime of discharge from Dnestrovsk reservoir was accepted with debit 2600 m3/s during
110 hours final volume of discharge was 1030 mln. m3 and the volume of affluent 1594 mln. m3. Thus
forced volume represents 564 mln. m3, which is lower on 36 mln. m3 compared with projected one.
Such regime of exploitation and management of flood debit permit to avoid negative effects
of flooding from July - August 2008.
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