Sanja Mustafic

Mapping average annual precipitation in Serbia (1961–1990) by using regression kriging

The appearence of geostatistics and geographical information systems has made it possible to analyze complex spatial patterns of meteorological elements over large areas in the applied climatology. The objective of this study is to use geostatistics to characterize the spatial structure and map the spatial variation of average values of precipitation for a 30-year period in Serbia. New, recently introduced, geostatistical algorithms facilitate utilization of auxiliary variables especially remote sensing data or freely available global datasets. The data from Advanced Spaceborn Thermal Emission and Reflection Radiometer global digital elevation model are incorporated as ancillary variables into spatial prediction of average annual precipitation using geostatistical method known as regression kriging. The R2 value of 0.842 proves high performance result of the prediction of the proposed method.

Extreme Erosion Rates in the Nišava River Basin (Eastern Serbia) in 2010

In the last decade several major floods have been registered on the territory of Serbia. The floods that affected the Nisava River Basin in spring 2010 have been the most severe in the last 50 years. During 2010 daily measurements of suspended sediment were carried out at the last hydrologic profile of Nis along the river. In the study period, mean annual specific runoff was 12.3 L s−1 km−2 and mean annual suspended load concentration was 0.1272 g L−1. A maximum mean monthly concentration of suspended load of 0.3806 g L−1 was recorded in May, when the mean monthly specific runoff was 24 L s−1 km2, and minimum 0.0118 g L−1 in September (2.7 L s−1 km−2). Total suspended load transport was 475,792.2 t (specific yield, 122.9 t km−2 year−1). The suspended transport over the year was 2.1 times higher than the average for the period of 50 years. Out of total annual sediment, 90.7% was moved in the period February to May. On a monthly level, the highest transport was observed in May (31% of the annual transport).

Transport of dissolved load in the hydrologically extreme conditions in the Crnica river basin

During 2010, 62065.3 t of the dissolved load were transported from the Crnica Basin, which was 5.1 times higher than the long-term average value. In hydrological terms the studied year was specific. In the period from January to May the amount of runoff water was significantly above the average perennial values, while in the period from August to November the amount was below the perennial average. According to the hydrological conditions in the period January-May 82.3% were transported, and in the period August-November only 5.1% of the annual dissolved load amount. Most of the year (54.2% of the time) the specific runoff was less than 10 l/s/km2, the average water mineralization was 374.9 mg/l, and in that time 13% of the total annual amount of the dissolved load was evacuated. On the other hand, the specific runoffs greater than 50 l/s/km2 represented 13.4% of the annual frequency, the average water mineralization was 263.3 mg/l, but for that time period even 53.9% of the annual quantity of the dissolved load was evacuated. [Projekat Ministarstva nauke Republike Srbije, br. 43007: Istraživanje klimatskih promena na životnu sredinu - pracenje uticaja, adaptacija i ublažavanje]