Flood vulnerability reduction. Case study: Tazlău river basin, downstream of its confluence with Tazlău Sărat

Abstract

The issue of water management as well as its impact on the community has been both a challenge and a concern of the European Union, which lead to adopting the Directive 2007/60/EC with the purpose of establishing a framework for the assessment and management of flood risks, by which the member states had to identify the areas for which they conclude that potential significant flood risk exist or likely to occur and to develop flood risk management plans and measures to reduce the consequences of flooding. In this respect, the Siret Water Basin Administration has declared the area of the Tazlău river, as a significant flood risk area (A.P.F.S.R.) (*** A.B.A Siret). The Tazlău River is a left-bank tributary to the Trotuș River, passing through the ten communes and partially through the outside the built-up areas of Onești city. Recent studies have shown the benefits of reservoirs and floodplains, as these provide the most effective way to buffer the effect of floods by slowing and spreading the discharge of a river (Băloi, 1980). By restoring and improving an existing lateral floodplain in the Tazlău River basin, in order to store part of the floodwaters that cause significant adverse consequences, will reduce the flood vulnerability of its crossings.

A GIS Automated Tool for Morphometric Flood Analysis Based on the Horton–Strahler River Classification System

“…In the XX and XXI centuries, there have been 8 years with major floods that registered significant material damage [12][13][14]. During the last 20 years, there have been several catastrophic floods in at least five large drainage basins in the eastern and southern parts of the country [15][16][17][18][19][20][21]. The specific events that took place between 2005-2006, 2008, 2010, and 2013 have been the worst floods of the last 100 years, causing damages totaling millions of euros and interrupting regional economic activities in the corresponding areas for extended periods of time [17,18,22,23].…”

Fast floods on the tributaries of Trotuș river, in the context of current climate change

“…The research carried out by Avram (2020), in the watershed of the Trotuș River highlighted the production of rapid floods on the tributaries, which sometimes had a high hydrological risk. At the same time, a series of studies were conducted on the Trotuș River and its tributaries on the formation of floods and their effect on the economic and social environment (Manolache, 2017;Tudorache et al, 2020;Tirnovan et al, 2021).…”