CC BY
43
УДК 528.9
Florina Grecu, Catalina Raboj, Laura Comanescu, Robert Dobre University of Bucharest Faculty of Geography Romania
GEOGRAPHIC RISK PHENOMENA THREATENING THE JIULUI DEFILE
The Jiului Defile is located in the Meridional Carpathians, being cut between the Parang Mountains (east) and the Valcan Mountaind (west). It develops on 33 km between Livezeni (556 m) and Bumbesti - Jiu (305 m) descending 251 m with an average slope of 7.6 m/km.
The risk phenomena manifested in this area are determined by: geologic structure (sediments, granite, and schist), geomorphologic factors (drainage density - over 2 km/km2, relief energy - over 200 km/km2, and present-day geomorphologic processes - collapses, gullies, land slides), climatic factors (at the Petrosani meteorological station the calculated annual average is of 7.60 C, with a January average of -4.50 C and a July average of 18.50 C; the annual average precipitations vary between 920 mm as registered at the Bumbesti - Jiu station and 1270 mm at the Parang station located at 1585 m), biogeographic (Fagus forests) and anthropic factors (forest clearings, the road and the railway).
The most destructive types of geographic risk affecting this area are: geomorphologic (collapses, gullies, land slides, rollings) and climatic (fog and frost)
Taking into account the intensity and frequency of risk we distinguished areas of great risk (Lainici - Pietrele Albe - Polatistea - Strambuta), areas with average risk (Bumbesti-Jiu - Lainici) and areas of low risk (Strambuta - Livezeni).
© Florina Grecu, Catalina Raboj, Laura Comanescu, Robert Dobre, 2006
