Omejevanje kraških kotanj z analizo polrezov

Razvoj metod daljinskega zaznavanja, računalnikov in programske opreme za obdelavo prostorskih podatkov se je dotaknil tudi področja geomorfologije. Vse troje omogoča hitrejšo analizo večjih količin podatkov, ne pa tudi natančnejše. Vzrok za to je slaba matematična definiranost nekaterih geomorfoloških oblik. V raziskavi se osredotočamo na omejevanje kraških kotanj. Za ta namen smo razvili nov pristop, ki pri določanju roba kotanje analizira njene polreze ter učinkovito zaznava tudi robove kotanj na pobočjih. Metoda omogoča pridobivanje natančnejših morfografskih in morfometričnih podatkov o kotanjah. Metodo smo razvili in preizkusili na petih kotanjah Podgrajskega podolja (JZ Slovenija) ter rezultate primerjali z rezultati metode, ki za omejevanje kotanj uporablja hidrološko modeliranje. Opažamo bistveno izboljšanje rezultatov pri omejevanju z novo metodo

Jame, denudirane jame in udornice kot kazalniki nekdanjega hidrološkega delovanja planote Grabovica (Bosna in Hercegovina)

Planota Grabovica je korozijska uravnava v južnem delu Bosne in Hercegovine. Za celotno območje je značilen pretočni kras, kjer podzemni tokovi, ki ponikajo na Duvanjskem polju, odtekajo v smeri izvirov na Livanjskem polju. V tej raziskavi smo izdelali morfografske in morfometrične analize površinskih in podzemskih oblik, predvsem udornic, denudiranih jam ter aktivnih in reliktnih jamskih sistemov. Interpretirali smo morfogenezo in preteklo hidrološko delovanje proučevanega območja

Tool for Drought Monitoring in the Danube Region: – Methods and Preliminary Developments

Drought is a naturally recurring phenomenon of the climate system that affects virtually all regions of the world. During the past decades extreme droughts with extensive negative effects on ecosystems became evident also in the Danube region. At the moment regional capacity to monitor drought is still very diverse and not synchronised among different countries. In this is paper, we present a recently developed drought monitoring tool – the Drought User Service (DUS) for the Danube region using remote-sensing products which aims at offering a more accurate and in near-real-time monitoring via different drought indices. The DUS was created as the monitoring tool of the risk-based paradigm, which seeks to give information in near real-time about the location and severity of droughts throughout the Danube region. Satellite remote sensing products meet the requirements for operational monitoring because they are able to offer continuous and consistent measurements of variables, which can be used to assess the severity, spatial extent and impacts of drought. In the DUS three different variables – vegetation, soil moisture and precipitation – are monitored with earth observation products. The condition of vegetation and soil moisture is tracked with two simple indicators computed as long-term anomalies of the NDVI and SWI products made available through EU’s Copernicus Global Land Service. The importance of DUS and of the developed methods for faster detection of drought onset as useful foundation for establishing a better pro-active drought management in order to mitigate the negative effects of drought in the region is discussed

Rekonstrukcija ozemelj prazgodovinskih skupnosti na prostoru severnega in srednjega Velebita z uporabo GIS-ov

Prispevek obravnava metodo rekonstrukcije ozemelj prazgodovinskih skupnosti z uporabo geografskih informacijskih sistemov (GIS-ov). Osredotočili smo se na železnodobne skupnosti severnega in srednjega Velebita na Hrvaškem, vendar je materialnih ostankov, ki bi neposredno dokazovali njihov obseg, zelo malo. Ozemlja predantičnih skupnosti smo modelirali z uporabo GIS-a glede na reliefne značilnosti in časovno oddaljenost dveh ur hoje od osrednjih gradišč z uporabo Toblerjeve enačbe

Uporaba digitalnega modela višin in satelitskega posnetka RapidEye za zaznavanje kraških kotanj in brezstropih jam Podgorskega krasa

Speleogeneza je proces nastajanja, razvoja in izginjanja jam. Zaključni stadij razvoja jame imenujemo brezstropa jama. Proučevanje le-teh nam lahko pomaga pri razumevanju krasa in kraških pojavov. Ker so brezstrope jame ali kotanje na površju ali le zaplate nekraških sedimentov z bujnejšim rastjem, v članku preučujemo možnosti kabinetnega prepoznavanja teh pojavov na podlagi njihovih morfometričnih lastnosti in spektralnih lastnosti vegetacije, ki jih prerašča. Raziskava je osredotočena na širše območje Podgorskega krasa v jugozahodni Sloveniji

Tool for drought monitoring in the Danube region - methods and preliminary developments

Drought is a naturally recurring phenomenon of the climate system that affects virtually all regions of the world. During the past decades extreme droughts with extensive negative effects on ecosystems became evident also in the Danube region. At the moment regional capacity to monitor drought is still very diverse and not synchronised among different countries. In this is paper, we present a recently developed drought monitoring tool – the Drought User Service (DUS) for the Danube region using remote-sensing products which aims at offering a more accurate and in near-real-time monitoring via different drought indices. The DUS was created as the monitoring tool of the risk-based paradigm, which seeks to give information in near real-time about the location and severity of droughts throughout the Danube region. Satellite remote sensing products meet the requirements for operational monitoring because they are able to offer continuous and consistent measurements of variables, which can be used to assess the severity, spatial extent and impacts of drought. In the DUS three different variables – vegetation, soil moisture and precipitation – are monitored with earth observation products. The condition of vegetation and soil moisture is tracked with two simple indicators computed as long-term anomalies of the NDVI and SWI products made available through EU’s Copernicus Global Land Service. The importance of DUS and of the developed methods for faster detection of drought onset as useful foundation for establishing a better pro-active drought management in order to mitigate the negative effects of drought in the region is discussed

Tool for Drought Monitoring in the Danube Region – Methods and Preliminary Developments

Drought is a naturally recurring phenomenon of the climate system that affects virtually all regions of the world. During the past decades extreme droughts with extensive negative effects on ecosystems became evident also in the Danube region. At the moment regional capacity to monitor drought is still very diverse and not synchronised among different countries. In this is paper, we present a recently developed drought monitoring tool – the Drought User Service (DUS) for the Danube region using remote-sensing products which aims at offering a more accurate and in near-real-time monitoring via different drought indices. The DUS was created as the monitoring tool of the risk-based paradigm, which seeks to give information in near real-time about the location and severity of droughts throughout the Danube region. Satellite remote sensing products meet the requirements for operational monitoring because they are able to offer continuous and consistent measurements of variables, which can be used to assess the severity, spatial extent and impacts of drought. In the DUS three different variables – vegetation, soil moisture and precipitation – are monitored with earth observation products. The condition of vegetation and soil moisture is tracked with two simple indicators computed as long-term anomalies of the NDVI and SWI products made available through EU’s Copernicus Global Land Service. The importance of DUS and of the developed methods for faster detection of drought onset as useful foundation for establishing a better pro-active drought management in order to mitigate the negative effects of drought in the region is discussed

Geomorphology of Blidinje, Dinaric Alps (Bosnia and Herzegovina)

<p>Blidinje is tectonically derived lowland in the Dinaric Alps within Bosnia and Herzegovina. It is surrounded by Vran, Čvrsnica and Čabulja Mountains. The Blidinje study area is predominantly built of carbonates, where karst, fluvial and glacial geomorphological systems interact. We present a 1:25,000 geomorphological map covering a 100 km² with an elevation range of 1200–1900 m. The map results from a combination of a fieldwork mapping, interpretation of orthophotos and an analysis of a digital elevation model. This map presents a distribution of landforms and sediments associated with the past and present karst, glacial and fluvial processes, such as different varieties of karst depressions, conical hills, erosional gullies, alluvial fans and large amphitheatre-like moraines. The focus of the presented map is to assist ongoing studies in this part of the Dinaric Alps that seek to understand the dynamics of former glaciers and associated palaeoclimate.</p