THE PHENOLOGICAL FLUCTUATIONS AS A POSSIBLE SIGNAL OF CLIMATIC CHANGES

The development (phenological) stages of some perennial plants and herbaceous plants as well stages of field work operation have been analysed at the mountain station Gospić during the available periods (mainly 1954–2004). The results of the linear trend analysis indicate a significant earlier blooming for plants which bloom in the second half of April and May. Those variations are the consequence of a significant increase in winter and spring insolation and air temperature

TEMPERATURE SUMS AND CLIMATIC VARIATIONS IN THE PARG REGION

Time series of temperature sums for the different temperature thresholds from the Parg station in the Croatia mountain area during the vegetation period from 1951 to 2004 have been analysed. The temperature differences between mean temperatures and temperatures thresholds are called the temperature sums or degree days and they are frequently applied in agrometeorology. The results of linear trend analysis and the Mann-Kendall test are shown that the significant linear trends temperature sums exit above thresholds 15°C and 20°C (increasing by time) which are the consequence of significant increase in mean maximum temperature in spring and summer

IVAN POTOČNJAK FIZIČAR I METEOROLOG

U radu se govori o prof. Ivanu Potočnjaku koji je zaslužan za prvi udžbenik iz meteorologije. Njegov rad na Gospodarskom šumarskom učilištu u Križevcima započinje 1875. gdje će godinama održavati nastavu meteorologije i klimatologije te rukovoditi radom meteorološke postaje. Prvi meteorološki udžbenik na hrvatskom jeziku objelodanio je 1878. Osim ovoga udžbenika tiskao je sam ili u koautorstvu i druge udžbenike za koje se malo zna, a kako su iz različitih područja znanosti nisu se ukupno dovodili u vezu s prof. Ivanom Potočnjakom

Geothermal and mineral waters of Croatia

U ovom seminaru pokušala sam što jednostavnije prikazati bogatstvo mineralnim i geotermalnim vodama na prostoru Hrvatske. Ukratko, termalne i mineralne vode vezane su uz određene tektonske i litostratigrafske uvjete koji moraju postojati da bi one izbile na površinu ili da bi se našle u podzemlju. Što se tiče kemijskog sastava neke su geotermalne vode slabo,a neke ječe mineralizirane. S obzirom na to one se mogu koristiti kao tehnička, sanitarna, voda za piće ili voda s balneološkim svojstvima. Mineralna voda se kod nas koristi za liječenje, rekreaciju, u zdravstvenom turizmu te ponegdje za punjenje boca s vodom za piće. Za racionalno gospodarenje geotermalnim i mineralnim vodama u Hrvatskoj potrebno je osigurati jedinstven sustav gospodarenja, nadzora korištenja i zaštite tih voda.In this seminar I tried to show simply as posible the wealth of Croatia with mineral and geothermal waters. In few words, thermal and mineral waters are related to a specific tectonic and lithostratigraphic conditions that have to exist in order for water to emerge or to be found in underground. As regards the chemical composition some of the geothermal waters are poorly, and some are more mineralized. According to this, one can be used as technical, sanitary, water for drinking or water with balneological use. We use mineral water for treatment, recreation, medical tourism and somewhere for bottling drinking water. For rational management of geothermal and mineral waters in Croatia it is necessary to ensure a unifide system of management, supervision and protection of water

The impact of a hydroelectric power station on the development and modernization of the Bajina Bašta settlement during the socialist period

During the process of socialist modernization, initiated after WWII, large development projects in Serbia were the main drivers of urban transformation. Electrification and industrialization resulted in the establishment of new production modes, which defined a new socio-economic background for the development of settlements and the modification of their functional and morphological structure. The construction of the Bajina Bašta hydroelectric power station, in the middle section of the Drina River in western Serbia, was one of the development projects, and it triggered the transformation of the environment, upgrading the pre-war small town of Bajina Bašta into a new urban node, adjusted to the socialist imperatives and standards of progress