Resursele de apă din România. Vulnerabilitate la activităţile antropice
[Water resources from Romania. Vulnerability to the pressure of man’s activities]

Conference Proceedings
ISBN: 978-606-8042-65-7

11-13 June 2010, Targoviste - Romania

Editors
Petre Gâştescu
Petre Breţcan

FENOMENE HIDROLOGICE DE RISC ÎN BAZINUL BÂSCA ROZILIEI

 Lidia SĂLĂJAN, Mihaela BUJOR 
Institutul Naţional de Hidrologie şi Gospodărirea Apelor – Bucuresti, str. Bucureşti-Ploieşti, nr 97, Bucureşti – România
lidia.salajan@yahoo.com

HYDROLOGICAL DANGEROUS PHENOMENA IN THE OF THE BASCA  ROZILIEI RIVER BASIN
Abstract. Everything that manking could  not conquer or explain has been put on hazard. Hazard consists of  two major  components: to the repeatability of a phenomenon and its main determining causes the other one is related to its random character, having no connection with the past, component that give the hysteresis state of the studied system (Sălăjan L., 2008). In the first part there will be a flood risk analyzed: generalidas, the leading factors for the extreme phenomena, the multiannual monthly average flow, the minimum, medium and maximum year, solid  flow, the river’s basin geographical position, and the effects of the antropic activities on the course of the flow. Defining the flood risk according to European Parliament directives 2006 represents the flood probability production, population health and economic losses. The risk factors are found in areas with different degrees of vulnerability, containing: population, buildings, economic activities, public services, infrastructure wich are subjected to risk in a given area (Crozier, 1988). In Bâsca Roziliei hydrographic basin the floods represent the most important risk event, and the geological structure and rock composition represent a major vulnerability because of the high gradient which determines  landslides and flashy streams. The solid flow represents a risk quantifier of a high water or flood flow state, the solid flow’s value is an important information for the studyed environment (deforestation, chaotic agriculture). Temperatures, precipitation, freezing-thawing processes, human actions and the consequences of flooding are responsable for the hydrological risk phenomena in the Bâsca Roziliei hydrographic basin. In the second part there are  analyzed  three historical floods from 1975 and 2005 recorded on the Basca river at the Varlaam gauging station on the Basca Mare river and on the Basca Mica river, and the other one at the Basca Roziliei gauging station on the Basca Unita river. After that, an evaluation of the negative effects are analyzed and actions to take in order to diminish the hydrological dangerous effects in this river basin are also suggested.

Full text .PDF

© Asociatia Romana de Limnogeografie (2008)