Analysis of the Floods Effects in June 2016 in the Voronet River Hydrographic Basin

Abstract

The paper presents an analysis of the hydrological risk parameters registered in the Voroneţ river basin. The studies and researches took place on the Voroneţ River after the June 2016 floods. The research has taken into account the hydrological risk parameters of the last 20 years recorded in the Siret River Basin. The river basin of the Siret River has been affected by multiple floods in recent years. The floods have morphologically modified the minor and the major river Voroneţ, a situation that influenced the floodplain areas in the urban environment and outside. The research analyzed the precipitation, the liquid flows (minimum, average and maximum), the way of formation and evolution of the floods, the volume of the damage produced, etc. The investigation of the precipitation volume indicated a number of factors that have prevailed over the last 20 years. The precipitation value was 71.6 l/m² in two days. The flow recorded in the downstream section of the river was 118.12 m³/s (the probability of calculation is 1%). The processing of liquid flow data revealed more flood flows in the same year. The effects of the floods have brought about the excessive degradation of shore defense works (about 2600 m) on the Voroneţ River located in the town of Gura Humorului, Voronet neighborhood and outside the city. The county road DJ 177D was degraded on 1600 m and two bridges were destroyed. Floods have resulted in the destruction of some economic and social objectives in the coastal area. The parameters of hydroclimatic risk highlighted by this research require special conditions for the design of works in the riverbed and the riparian area.