Karst rivers’ particularity: an example from Dinaric karst (Croatia/Bosnia and Herzegovina)   总被引：2，自引：2，他引：0  

Ognjen Bonacci  Ivana Željković  Amira Galić 《Environmental Earth Sciences》2013,70(2):963-974

The very complex system of sinking, losing and underground transboundary Karst rivers, lakes and aquifers in the central part of the deep and bare Dinaric karst in Croatia and Bosnia and Herzegovina is analysed. The groundwater and surface water are hydraulically connected through numerous karst forms which facilitate the exchange of water between the surface and subsurface. A complex underground conduit system is an inherent characteristic karst system analysed. Groundwater and surface water exchange with both adjacent and distant aquifers through underground routes or inflows from surface streams and artificial reservoirs. Because of a complex surface and underground karst features, which strongly influenced its hydrological and hydrogeological regime, the main open stream flow, with a longitude of about 106 km, undergoes eight name changes. In this paper, it is noted as “the eight-name river”. In fact, it represents one river with losing, sinking and underground stream sections. Different surface and underground karst forms play crucial roles in the way the water flowing over the surface and on the underground sections of its catchment. The analysed area is full of varied and often spectacular surface landforms, including for example the Blue and Red Lakes and the Kravice Waterfall. The analyses made in the paper show the existence of a decreasing trend of mean annual discharges on the eight-name river, which can cause numerous problems in the regional water resource management of this transboundary river and catchment.  相似文献   

Paleoart: Visions of the Prehistoric Past     

Peter Vujaković 《The Cartographic journal》2013,50(3):300-301

Abstract

Cartography in general, and building solid landscape models in particular, requires an interdisciplinary set of skills in order to be done well. Traditional handcrafted construction methods provide quality results, but are extremely labour-intensive and therefore costly. Modern methods using digital terrain models (DTMs) and computer numerical control (CNC) milling are fast and accurate, but the finished models are visually less than optimal. Solutions are proposed using DTMs and CNC milling to create landscape models in which the initial shaping is done mechanically and the fine details are carved by hand. This ‘balanced approach’ to landscape modelling combines the time- and cost-advantages of modern digital technology with the quality of traditional handcrafted techniques resulting in highly accurate landscape models which still retain the artistic ‘feel’ of the human touch.  相似文献   

Photocatalytic Degradation of Dye C.I. Direct Blue 78 Using TiO2 Nanoparticles Immobilized on Recycled Wool‐Based Nonwoven Material     

Darka Marković  Bojan Jokić  Zoran Šaponjić  Branislav Potkonjak  Petar Jovančić  Maja Radetić 《洁净——土壤、空气、水》2013,41(10):1002-1009

This paper discusses the possibility of immobilization of TiO₂ nanoparticles onto recycled wool‐based nonwoven material, which can be utilized for removal of dyes from wastewater. The photocatalytic activity of TiO₂ nanoparticles deposited on the nonwoven material was evaluated in the aqueous solution of direct dye C.I. Direct Blue 78 under the UV illumination. Nonwoven material modified with TiO₂ nanoparticles provides complete removal of dye from the solution already after 4–6 h of UV illumination. However, photodegradation of the dye adsorbed on the nonwoven material was obtained within 24 h of UV illumination. The rate of dye adsorption and photodegradation depends on the amount of deposited TiO₂ nanoparticles. The increase of initial dye concentration induced decrease in photocatalytic efficiency of immobilized TiO₂ nanoparticles. The highest photodegradation rate was achieved in acidic conditions. Elevated temperatures positively affected the removal of dye from solution. Photocatalytic activity of TiO₂ nanoparticles deposited on nonwoven material was preserved after three photodegradation cycles.  相似文献   

The Energy of High-Frequency Waves in the Low Solar Chromosphere     

A. Anđić 《Solar physics》2007,242(1-2):9-20

High-frequency acoustic waves have been suggested as a source of mechanical heating in the chromosphere. In this work the radial component of waves in the frequency interval 22 to 1 mHz are investigated. Observations were performed using 2D spectroscopy in the spectral lines of Fe i 543.45 nm and Fe i 543.29 nm at the Vacuum Tower Telescope, Tenerife, Spain. Speckle reconstruction has been applied to the observations. We have used Fourier and wavelet techniques to identify oscillatory power. The energy flux is estimated by assuming that all observed oscillations are acoustic running waves. We find that the estimated energy flux is not sufficient to cover the chromospheric radiative losses.  相似文献   

Circulation weather types and their influence on precipitation in Serbia     

Suzana Putniković  Ivana Tošić  Vladimir Đurđević 《Meteorology and Atmospheric Physics》2016,128(5):649-662

  相似文献   

Anticipating and managing engineering problems in the complex karst environment     

Mario Parise  Damien Closson  Francisco Gutiérrez  Zoran Stevanović 《Environmental Earth Sciences》2015,74(12):7823-7835

  相似文献   

Understanding the influence of climate elements on traffic: the wind impact approach     

Sentić  Ivana  Đorđević  Tijana  Đorđević  Jasmina  Ljubojević  Mirjana  Čukanović  Jelena 《Theoretical and Applied Climatology》2022,149(1-2):661-681

Theoretical and Applied Climatology - Due to intense highway congestion in Europe, increased percentage of highway accidents, as well as mortality rate, safety is an imperative in highway planning...  相似文献   

Trends in combined climate indices in Serbia from 1961 to 2010     

Pavle Arsenović  Ivana Tošić  Miroslava Unkašević 《Meteorology and Atmospheric Physics》2015,127(4):489-498

  相似文献   

Parametric roll due to hull instantaneous volumetric changes and speed variations     

Jelena Vidic-Perunovic  Jørgen Juncher Jensen 《Ocean Engineering》2009,36(12-13):891-899

Parametric roll of a containership in head sea condition has been studied in the paper. A time domain routine for GZ righting arm calculation based on exact underwater hull geometry has been implemented into a two-degree-of-freedom procedure for roll response calculation. The speed variation due to e.g. added resistance has been accounted for in the model by the surge velocity. The ship roll motion due to a regular wave critical for parametric roll occurrence has been simulated, as well as the ship roll response in a severe stochastic sea. The present method has been compared with other existing methods for parametric roll prediction.  相似文献   

Cloning and mRNA expression analysis of an ABCG2 (BCRP) efflux transporter in rainbow trout (Oncorhynchus mykiss) liver and primary hepatocytes     

Zaja R  Munić V  Smital T 《Marine environmental research》2008,66(1):77-79

  相似文献