Mircea Sevastel

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Publications (2)0 Total impact

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    Article: SOIL EROSION AND CONSERVATION IN ROMANIA - SOME FIGURES, FACTS AND ITS IMPACT ON ENVIRONMENT
    Mircea Sevastel, Petrescu Nicolae, Musat Marin, Radu Alexandru, Sarbu Nicoleta
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    ABSTRACT: Being a common and finite resource, soil - as a natural and very complex ecosystem, is essential to human society. Inseveral regions of Europe, including Romania too, soil resources are degraded due to different causes, or, sometimes,irreversibly lost, mainly due to erosion, decline in organic matter or contamination. As regard to soil erosion only, inRomania, about 42% of the total agricultural lands are affected by water erosion in different forms and intensities.Soil degradation has negative impacts on other areas also, not only in-site but also off-site, areas which are alsoconsidered of common interest for the people (e.g. air and water quality, biodiversity and climate change). Costs torestore such a damages and environmental quality in general may be very high and thus preferable to be avoided.To maintain and/or improve a good quality of the soils for a long period of time, there needed to be implemented inRomania , as much as possible, some agri-environmental schemes, according to the current EU models and policies, inparticular, through the Common Agricultural Policy (CAP).The paper briefly presents and analyzes such agri-environmental schemes developed for the agricultural lands from thehilly areas in Romania that is very affected by water erosion and landslides – the Curvature zone of Sub-Carpathians.The schemes, developed within the Research Station for Soil Erosion and Conservation Aldeni-Buzau, which belongs tothe University of Agricultural Sciences in Bucharest, is based on friendly agricultural practices to be implemented onagricultural lands located on slopes. Also, the new conceptual European model, known as Driving Forces-Pressures-State-Impacts-Responces (DPSIR), adapted for the soil erosion impact assesment on environment, will be herepresented, in order to be promoted and used on a large scale in Romania as well.
    Annals : Food Science and Technology. 01/2010;
  • Article: MATHEMATICAL SOLUTIONS FOR OPTIMAL DIMENSIONING OF NUMBER AND HEIGHTS OF SOME HYDROTECHNIQUE ON TORRENTIAL FORMATION
    Petrescu Nicolae, Iordache Stefania, Mircea Sevastel, Taralunga Renata
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    ABSTRACT: This paper is intended to achieve a mathematical model for the optimal dimensioning of number and heights of somedams/thresholds during a downpour, a decrease of water flow rate being obtained and by the solid material depositionsbehind the constructions a new smaller slope of the valley that changes the torrential nature that had before theconstruction is obtained.The choice of the dam and its characteristic dimensions may be an optimization issue and the location of dams on thetorrential (rainfall) aspect is dictated by the capabilities of the foundation and restraint so that the chosen solutions willhave to comply with these sites. Finally, the choice of optimal solution to limit torrential (rainfall) aspect will be basedon a calculation where the number of thresholds / dams can be a variable related to this, their height properly varying.The calculation method presented is an attempt to demonstrate the multiple opportunities available to implement atechnical issue solving conditions offered by the mathematics against soil erosion, which now is currently very topicalon the environmental protection.
    Annals : Food Science and Technology. 01/2010;
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