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Natural Hazards - Despite the controversy regarding their use, school buildings are often assigned as emergency evacuation shelters, temporary accommodation and aid distribution hubs following...  相似文献   
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We performed two column experiments to study the impact of different levels of irrigation intensity on the leaching of nitric nitrogen. The experiment was run on a soil packed column and using 200 kg?N/ha as fertilization rate for the first column, and none for the second. In parallel, we carried out digital simulations (mechanist model) to study the transfer of nitrogen through the studied columns followed by an application of the model to various amounts of nitrogen. The impact study of successive irrigations showed that these contribute to the transport and the accumulation of nitric nitrogen of the upper layers towards the deeper layers. The quantity of nitric nitrogen N–NO3 drained by scrubbing was about 191 kg?N/ha for the first column, and 15 kg?N/ha for the second. In addition, the numerical simulations revealed that the precision of the model is satisfactory with an over-estimation of about 20%. To cite this article: M. Ibnoussina et al., C. R. Geoscience 338 (2006).  相似文献   
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This work focuses on the building material used in the Saadian sugar refinery of Chichaoua (about 70 km southwest of Marrakesh). The study involved a classification of different types of rammed earth, followed by their mineralogical characterization based on optical microscopy, scanning electron microscopy (SEM) and X-ray diffraction (XRD). These studies are complemented by chemical investigations, X-ray fluorescence, and thermal analysis (DTA and TGA). The results demonstrate the use of two types of earth for the realisation of rammed earth, the first one non-plastic, -grained with added lime, the other one of low plasticity, and fine grained without addition of lime. Mechanical tests on site and in laboratory how at the first type of material exhibits great strength, exceeding the values known for rammed earth.  相似文献   
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