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Land Use and Land Cover Changes of West Tahta Region,Sohag Governorate,Upper Egypt

Journal of Geographic Information System 2012年第6期4卷 483-493页

作者： Ismail Esam Faid Abdalla niesner erich Department of Applied Geosciences and Geophysics Montanuniversitat LeobenLeobenAustria Geology Department Faculty of ScienceMinia UniversityEl-MiniaEgypt National Authority for Remote Sensing and Space Sciences(NARSS) CairoEgypt

Due to the growing of population in Egypt during the last few decades, great changes in agricultural area, and urbanization of Egypt art occurred. In this study we utilized the available record of multitemporal Land sat Thematic Mapper (Tm) and Egyptsat image to produce land cover/land use map of the area between 1987 and 2009. Also we used the post-classification change detection analysis to detect the change in the agriculture, urban areas and the change in the River Nile during the period between 1987 and 2009. The post-classification change detection analysis shows that agriculture development increased by 1785.96 Hectare through the study period with average annual rate of land reclamation 81.18 Hectare/year. While the urban area increased by 2231.24 Hectare with average annual rate 101.42 Hectare/ year the increase of the urbanization and the growth occurring through encroachment into the farmer old cultivated lands. The change in the River Nile is not so much is reached to 138.32 hectare in the study period with average annual rate 6.29 Hectare/year. The result of this study show that, the accuracy are quantify with the land cover changes and also delineate their spatial patterns, which display the efficiency of land sat in evaluating landscape dynamics over a particular time span. This data are very useful for natural resources management.

关键词： Land Use Land Cover Remote Sensing Change Detection

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Comparison of the Groundwater Quality in the West Tahta Area, Upper Egypt in 1989 and 2011

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Journal of Environmental Protection 2012年第11期3卷 1442-1457页

作者： Ismail Esam Faid Abdalla niesner erich Mauritsch Hermann Department of Applied Geoscience and Geophysics Montan University Leoben Austria National Authority for Remote Sensing and Space Sciences (NARSS) Cairo Egypt

Egypt is characterized by arid climate with rare rainfall that means surface water. The River Nile is the main source of water supply. The study area is located in Upper Egypt in the western desert. The area under investigation is subjected to intensive development in the last twenty years, clearly seen in the change of the agriculture and urban areas. The rapid increase of the population in Egypt especially in the upper part leads to an increasing demand for houses on the old cultivated land lead to the migration towards the desert and reclaimed new areas. These new reclaimed areas are depending on the ground water. The extensive use of groundwater and increasing fertilizing system leads to the change of the water table, characterization and quality. In this study we use the analysis of 30 groundwater samples collected and analyzed in 1989 and 28 groundwater samples collected and analyzed in 2011 from the same area to identify the change in the quality of the ground water. According the hydrogeologic data which were collected from the study area in 1989 and 2011 we found a changing water table decreasing, from 1 to 48 m in 1989 and 5 to 60 m in 2011. The water level is decreasing in the same direction towards the River Nile. The sufficient recharge and leaching and dissolution of the aquifer materials due to extensive use lead to increase in TDS which reaching to 4453 ppm in 2011. The water type in the 1989 samples is mainly NaHCO3 and in 2011 samples Na2SO4. Grid classification shows that the water samples collected in 1989 are mainly sodium bicarbonate and sodium chloride extending to sodium sulphate while the water samples collected in 2011 are mainly sodium sulphate and sodium chloride. Most of the 1989 groundwater samples are suitable for drinking purposes while majority of the 2011 groundwater samples are not suitable due to high salinity.

关键词： Under Groundwater Withdrawal West Tahta Evaluation of Groundwater

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液体闪烁计数水溶性样品的最佳条件选配

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核农学通报 1980年第1期 61-63页

作者： M.Tschurlovits R.niesner 余雅福奥地利大学原子能研究所奥地利大学原子能研究所

用液体闪烁计数测定3H 和其它弱β放射体时,很少有人注意使所用的闪烁液和被测样品材料之间的数量关系配置得当以改善探测下限。本文叙述了选配最佳条件的方法,并给出了测量3H 和14C 的例子。采用这种方法可使探测下限提高约七倍。

关键词：液体闪烁闪烁液水溶性

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