Yazar "Ertekin, C" seçeneğine göre listele

Listeleniyor 1 - 2 / 2
  • Küçük Resim
    Öğe
    Agricultural sustainability in Turkey: Integrating food, environmental and energy securities
    (Wiley, 2002) Evrendilek, F; Ertekin, C
    Agricultural production in Turkey is not sustainable due to degradation and loss of croplands, rapid population growth, and inequitable economic growth (poverty and overconsumption). Degrading land uses and management practices disturb the life-supporting biogeochemical cycles within croplands and between croplands and natural ecosystems by increasing emissions of greenhouse gases (GHGs: CO2, CH4, N2O, CFCs, and tropospheric O-3), pollution of water, soil and air, loss of soil organic matter and biodiversity, erosion, salinization and desertification. Sustainability-oriented management practices in croplands include maintenance of soil organic matter by conservation tillage and residue management, windbreaks, selection of crops ecologically adapted to local climate regimes, efficient crop rotation, enhancement of agrobiodiversity (e.g. intercropping and agroforestry), and adoption of proper drainage techniques. Implementation of these preventive and mitigative measures necessitates internalization of ecological principles into agricultural policy and management processes. This study explores the opportunities and limitations of agricultural sustainability in Turkey in a holistic manner. A multiple linear regression (MLR) model was developed to relate CO2 emissions to energy intensity (energy use/gross domestic product), affluence (gross domestic product/population) and population growth. Our MLR model with a high R-2 of 97 per cent revealed that stabilization of human population growth, and increasing energy efficiency in economic growth are essential to decreasing GHG emissions and enhancing environmental quality. Copyright (C) 2002 John Wiley Sons, Ltd.
  • Küçük Resim
    Öğe
    Assessing the potential of renewable energy sources in Turkey
    (Pergamon-Elsevier Science Ltd, 2003) Evrendilek, F; Ertekin, C
    To meet Turkey's growing energy demand, the installed electric power capacity of 27.8 GW in 2001 has to be doubled by 2010 and increased fourfold by 2020. The difference between Turkey's total primary energy supply (TPES) of from its own sources and total final consumption (TFC) is projected grow from 1 quad (1.06-2.06) in 1999 to 5.71 quads (2.79-8.5) in 2020 (1 quad = 293.071 TWh). Turkey's limited amount of fossil fuels has a present average ratio of proved reserves of 97.38 quads to production rate of 3.2 quads yr(-1) of about 30 years. Turkey's reliance on fossil fuel-based energy systems to meet the growing demand is most likely to exacerbate the issues of energy insecurity, national environmental degradation, and global climate change in increasing proportions. Economically-feasible renewable energy potential in Turkey is estimated at a total of ca. 1.69 quads yr(-1) (495.4 TWh yr(-1)) with the potential for 0.67 quads yr(-1) (196.7 TWh yr(-1)) of biomass energy, 0.42 quads yr(-1) (124 TWh yr(-1)) of hydropower, 0.35 quads yr(-1) (102.3 TWh yr(-1)) of solar energy, 0.17 quads yr(-1) (50 TWh yr(-1)) of wind energy, and 0.08 quads yr(-1) (22.4 TWh yr(-1)) of geothermal energy. Pursuit and implementation of sustainability-based energy policy could provide about 90 and 35% of Turkey's total energy supply and consumption projected in 2010, respectively. Utilization of renewable energy technologies for electricity generation would necessitate about 23.2 Mha (29.8%) of Turkey's land resources. (C) 2003 Elsevier Science Ltd. All rights reserved.