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.

На основе обобщения различных гидрометеорологических и других материалов о наводнении в июле-августе 2008 года, выполнен анализ условий формирования, динамики и режимов сброса катастрофического паводка каскадом Днестровских водохранилищ. Приведены количественные параметры паводка и выполнены расчеты возможного альтернативного режима сброса паводочных вод из Днестровского водохранилища, в случае реализации которого можно было избежать негативных последствий наводнения.