MSU scientists in the international team has set a new deadline of seasonal flooding in Russia and Europe. Changes in seasonality of river flooding, according to the researchers, is related to global warming. About it reported in a press release received by "the Ribbon.ru".
A key figure in the work of the researchers was water consumption — this value shows the volume of water passing through a cross section of a river per second. Consumption reaches its maximum during floods that occur due to intense rainfall, melting snow and a gradual accumulation of moisture in the soil. Moreover, a prolonged period of high humidity to a greater extent contributed to the flood of the rivers than intense precipitation. Scientists have identified what times of the year, increased water consumption associated with all three factors.
They analyzed 300 thousand values of the maximum costs and the same number of dates by which they are confined. Three times more data was processed to evaluate meteorological conditions. The data was gathered from 300 hydrological stations on a total area of 500 thousand square kilometers, the information for the last 50 years, obtained from several thousand points of observation.
It turned out that in different regions the seasonality of floods has changed in different ways. Thus, in the North-East of Europe the maxima of the water flow in the river moved back eight days, and on the Atlantic coast — on 16. In the North-West European part of Russia, the date has shifted almost a week. In the South this tendency is expressed less brightly.
According to scientists, the later peaks of water availability can reduce the productivity of agricultural land on the North sea coast due to the fact that the soil is more dry during the beginning of agricultural work. The displacement of the maxima in Eastern Europe may lead to inefficiency of the reservoirs and the need for revision of the schedules in their content.