DIGITALNA ARHIVA ŠUMARSKOG LISTA
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| ŠUMARSKI LIST 13/2005 str. 131 <-- 131 --> PDF |
S. Pcrić. V. Topic. Ž. Orcškovic, R. Maradin: BIOLOGICAL CONTROL OF EXCAVATIONS AND DUMPS ... Šumarski list -SUPLFMFNT (2005). 120-132 While developing this study, we used the data from red as the brushwood of pubescent oak (Quercuspubethe Forest Management Programme of Dalmatia scens), while the "Rovanjska" dump site has not been (1986-1995). The waste disposal site of "Posedarje" is encompassed by the mentioned Programme, located on the cadastre unit 1791/1 Posedarje, registe- NATURAL CHARACTERISTICS OF THE AREA Geographic position The Rovanjska excavation site is located in the Ja- darje cadastre area is close to, and on the southern side senicc cadastre area close to the Split-Zagreb motor- of the highway. The locations of both sites are shown road route, about 300 m south of the village Jasenicc in Map 1. The terrain has typical karst morphology, and the Velebitski Kanal channel at the foot of the Ve- The shape of both sites is irregular (Photo 1 and 2). lebit Mountain. The Posedarje dumpsite in the Pose- Geological and hydrographical properties According to the geological map of the sectionObrovac (Ivanovie et al. 1976), the area where thewaste sites are located are dominated by layered andplate chalks with shallow brown soils and red clay. Thewaste sites are located close to the Novigradsko More bay and the Velebitski Kanal channel. The rocks are broken and karstificd, so that the precipitation enters the underground. Heavy rains cause runoffs and surface erosion, Climate A significant natural factor, climate affects the floral distribution and diversity. To describe the climate ofthe research area, we used the 1961-1990 data of theZadar meteorological station. The data in Table 1 show that the long-term meantemperature has been 14.7 °C, with maximum and minimum values in January and July. The absolute maxi mum summer temperatures occasionally rise even to 35.7 °C, and the minimum values sometimes fall down to -9.1 °C. The temperature oscillations are considerable, and if they last for longer periods of time, they may cause various types of damage to the individual plant species, Locations on the highway route The quantity of precipitation and its distributionthroughout the year are the major factors in the development of vegetation. Table 2 shows that of the totalprecipitation in the research area, about two thirds fallin wintertime, while one third is distributed over springand summer months. According to Lang´s annual rainfactor (62.31), this area has a humid climate, while itssummer months belong to thc and climate according to the monthly rain tactor. Rain often falls in strong showers, so that it oftenamounts to over 80 mm in one day. The relative yearlyair humidity in Zadar is 72 %. This area has three daysin a year with air moisture lower or equal to 30 %, and55 days with air moisture above, or equal to, 80 %. Zadar area has an average of 16 frosty days. Frost isrecorded at the Zadar meteorological station betweenOctober and May. The most frequent frosts are in Janu ary, with an average of 5.2 days. According to the measurements, the phenomenon of late spring frosts is rare, Snow in this area falls very seldom and is short-lived, The maximal recorded height of the snow is 18 cm. The dumpsj te s are located in the area of very inten sive air streamS) which are particularly frequent in the co,d seasons of the year Thc dominating winds arc bo_ ra? south wmd? and mistra i Very strong and stormy> the bora of tnis region under me Velebit mountain blows in all seasons of the year, but it lasts the longest and with the greatest strength in winter, mainly from January unti] March. The south wind blows throughout the year, but mainly in the autumn. It is sometimes wann anci dry, but then it causes much damage to the plants. Coming from the sea on warm and hot summer days, the mistral brings fresh sea air that soothes the otherwi se unbearable summer heat. Vegetation In terms of phytogcography, the plant cover of this 1992). The vegetation of the area has developed accorarea belongs to the Mediterranean-littoral vegetation ding to the climatic and edaphic conditions. The bot- belt within the sub-Mediterranean zone (Raus et al. tom area of the mountain Velebit was once covered by |