SEVEN YEARS (2004-2010) PRECIPITATION DISTRIBUTION IN TRANSYLVANIA (ROMANIA) FROM DAILY DATA

Seven years (2004-2010) precipitation distribution in Transylvania (Romania) from daily data. Daily precipitation amount data from 21 meteorological stations were studied. These stations are located in the following counties: Alba, Brasov, Cluj, Covasna, Harghita, Mures and Sibiu. Factor analysis was applied in order to delimit areas with same precipitation distribution patterns in Transylvania in the period 2004-2010. It was found 3 dominant factors which can explain 67.19 % of variance. All factors are related to local conditions, namely to geographic position, but they are independent from topography. Using factor loadings, 3 maps are presented, which reveals the spatial influence of these 3 factors. For each meteorological station was made a precipitation distribution figure. These figures and the 3 maps were made with Arcmap software using spline with barriers interpolation method. Distribution figures of stations defined by the same factor pattern are similar. The first factor, responsible for less precipitation affects especially the south eastern part of area. The third factor provides the highest amount of rainfall and influence mainly the northern part of region. The south western part of Transylvania is dominated by the second factor which insures the most balanced precipitation pattern