DBPapers
DOI: 10.5593/SGEM2014/B31/S12.040

FLASH FLOODS ON A FORESTED AND HEAVILY POPULATED CATCHMENT. CASE STUDY FOR SUHA BASIN (ROMANIA)

A. TIRNOVAN, GH. ROMANESCU, M. G. COJOC, C. STOLERIU
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-13-1 / ISSN 1314-2704, June 19-25, 2014, Book 3, Vol. 1, 303-314 pp

ABSTRACT
This analysis of the evolution of the most important flash-floods of the Suha River basin outlines a clear picture of their triggering factors and their way of manifestation. The most significant flash-floods occurred in 1975, 1981, 1984, 1991, 2005, 2006, 2007 and 2008. The highest flows recorded at the gauging stations were: 175 m3/s at the hydrometrical station Stulpicani (Suha) in 1981; 95.5 m3/s at the hydrometrical station Gemenea 5, on Slatioara River in 2008; and 42.8 m3/s at the hydrometrical Gemenea 2, on Gemenea River in 2006. The quantities of rainfall that led to these flash floods were not very high, but the duration, to which shall be added the characteristics of the morphometric basin, generated a quick and increased concentration in the water level. Massive afforestation cannot completely stop the flooding. The effects are obvious in the areas occupied by human settlements and on economic objectives. Floods in sub basins of equal areas are similar. Extended deforestation surfaces in the upper basin spawned some local torrential rainfall generating floods on the main collector (Suha). The local rainfall is underlined by the existence of isolated flooding.

Keywords: Flash-flood, Flooding, Rainfall, Romania, Land use