THE 05.06.2012 SLOPE FLOOD RUNOFF IN THE LOWER BASIN OF ILIŞUA RIVER –
CAUSES, EFFECTS AND FUTURE MEASURES
Gh. şerban, gh. hognogi, fl. stoica
ABSTRACT. – The 05.06.2012 slope flood runoff in the lower basin of Ilişua river – causes, effects and future measures. In the context of the Code Yellow for rainfalls and storms, issued by National Administration of Meteorology (NAM), a downpoor occurred on the 5th of June 2012 in the afternoon, between 16.00 and 16.30 hours, with maximum intensity in the area of the Dobric – Dobricel – Spermezeu – Păltineasa – Dumbrăviţa – Căianu Mare – Căianu Mic localities. The extreme meteorological event has caused a severe slope runoff. Fortunately, the effects did not include any victims, although they were very severe, judging by the blocking of tens of kilometres of road, the flooding of almost 200 households and several hundreds of hectares of agricultural land. The risk map showing the occurrence distribution of slope flood runoff and associate meteorological events reveals the need of implementing strict measures consisting in: partial afforestation of the two thirds of the cleared slopes, management and diversion of floods that discharge their liquid and alluvial material over the human settlements located in the closest proximity of the slopes, resizing of the access infrastructure (bridges, footbridges) and flood defence infrastructure (dams, runoff drainage system), scenario-based training of population to react promptly to the development of the extreme hydrometeorological events. On the contrary, the questionnaires applied in the study area reveal a lower preparedness level of the population for an efficient, optimum reaction, in order to significantly reduce the effects of these phenomena.
Key words: downpoor, slope flood runoff, local effects, risk map, structural and non-structural measures.