Assessment of dependence of change in Lithuanian river runoff on size of drained areas

Мисецкайте О., Тапараускене Л. Оценка зависимости изменения стока рек Литвы от размера осушенных территорийFollowing the data series of 62 years, it was determined that water balance of Nevezis basin is characterized by negative water balance during May–September due to higher evapotranspiration than average precipitation amount of the same period. It was stated that the average annual flow coefficient of the whole 10th hydrologic region of Lithuania was 0.3 till reclamation. It decreased to 0.28 during the period of intensive rec-lamation, however, the average annual flow was 0.35 from 1980, i.e., it increased in comparison with the period till reclamation. The average flow coefficient of warm period was 0.10 till reclamation, and remained the same during the period of 1956–1980, while the data of 1981–1995 show that the average flow coefficient increased – 0.11