Climate Variability and Change—Hydrological Impacts (Proceedings of the Fifth FRIEND World
Conference held at Havana, Cuba, November 2006), IAHS Publ. 308, 2006, 407–412.
Climate change impact on reservoir water supply
reliability
Dana Halmova & Marian Melo
1 Institute of Hydrology, Slovak Academy of Sciences, Racianska 75, 838 11 Bratislava, Slovakia
halmova@uh.savba.sk
2 FMPI Comenius University Bratislava, Mlynska dolina, 842 48 Bratislava, Slovakia
Abstract Climate is
changing gradually as a result of the increased greenhouse effect. Changed
climate conditions affect many processes within the landscape and many spheres
of our life can thus be influenced. In this contribution, we study the ability
of water reservoirs to ensure a required water demand under changed climate
conditions. The aim of the first part was to prepare regional scenarios of air
temperature and precipitation for some meteorological stations in eastern
Slovakia under the assumption of an enhanced greenhouse effect according to two
climate models. Reservoir water supply reliability was calculated using the
water balance model “WBMOD” that works with a monthly time step. The input data
series of precipitation and air temperature and the observed reservoir outflows
were used to express the expected changes in the total runoff and the required
reservoir capacity. Failures in the required water supply both in volume and in
time were evaluated for changed climate conditions.
Key words climate change; climate scenarios;
water reservoir; water supply; reliability