HYDROMETRIC MONITORING OF RIVERS IN CONDITIONS OF EHTREME PHENOMENA-METHODICAL AND TEHNOLOGICAL INOVATIONS

  • 1 National Institute of Meteorology and Hydrology, Bulgaria Academy of Science, Bulgaria

Abstract

High water levels in the conditions of extreme events are a characteristic phase of the river runoff in the order of several hours passing huge volumes of water. The drainage is characterized by turbulent state, significant velocities and depths, which change rapidly and cause pronounced uneven and unsteady process. Water quantities may exceed a few hundred times their annual average, causing large spills in river valleys, and the deep depth and dragging force of the stream are a natural disaster causing huge damage with the possibility of human casualties.

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