درستْ خصائص التربة الديناميكية في منطقة الغوطة الشرقية الواقعة في حوض دمشق الرسـوبي،
بهدف تقدير قيم الدور المسيطر و معامل التضخيم لكل موقع، باستخدام تقنية نكامورا، و هـي مـن أهـم
التقنيات التجريبية الحديثة المستخدمة عالمياً في دراسة تأثير الجيولوجيـا الـسطحية علـى الاسـتجابة
الأرضية و أكثرها شيوعاً. نُفّذَ نحو 1000 قياس للضجيج الزلزالي موزعـة علـى 265 موقعـاً تغطـي
التوضعات الجيولوجية المختلفة، و بعد تحليلها حسبت المنحنيات البيانية للنسبة الطيفية ثم حـددتْ قـيم
الدور المسيطر و معامل التضخيم، و قد أظهرت نتائج قياسات الضجيج الزلزالي وجود توافـق جيـد مـع
المعطيات الجيولوجية و نتائج نمذجة السبور الجيوتكنيكية، إذ تتغير قيم الدور المسيطر و معامل التـضخيم
من موقع إلى آخر بشكل واضح.
The dynamic soil characteristics in Eastern Ghoota, which is located on
Damascus basin, was studied to estimate the predominant period and the
amplification factor in all sites, using Nakamura's technique. This technique is
considered as one of the important empirical techniques used in the world to
study the surface geology effects on site response. About 1000 seismic noise
measurements were carried out in 265 sites covering different geology deposits.
The H/V spectra ratio were calculated and analyzed to determine the site
predominant period and amplification factor. The results exhibit good
correlation with the local geology and the modeling of geotechnical boreholes,
whereas the predominant period and amplification factor values vary clearly
from site to site.
References used
Abou Romieh, M. Westaway, R. Daoud, M. Radwan, Y. Yassminh, R. Khalil, A. Al-Ashkar, A. Loughlin, S. Arrell, K and Bridgland, D. (2009). Active crustal shortening in NE Syria revealed by deformed terraces of the River Euphrates, Terra Nova, 21, 427-437
Alchalbi, A. Daoud, M. Gomez, F. McClusky, S. Reilinger, R. Abu Romeyeh, M. Alsouod, A. Yassminh, R. Ballani, B. Darawcheh, R. Sbeinati, R. Radwan, Y. AlMasri, R. Bayerly, M. Al Ghazzi, R and Barazangi, M. (2009). Crustal deformation in northwestern Arabia from GPS measurements in Syria: Slow slip rate along the northern Dead Sea Fault; Geophysical Journal International. Vol. 180: 125-135
Ambraseys, N. N and Barazangi, M. (1989). The 1759 earthquake in the Bekaa Valley: implications for earthquake hazard assessment in the Eastern Mediterranean region, J. Geophys. Res., 94, 4007-4013
In this study, drought in the eastern region of Syria (Hasake, Rakka,
DerAzzor, Bokmal & Kameshli) has been investigated using SPI, NDVI
indices.
We used a set of data containing precipitation data for period from 1975 to 2010 to calculate Standardized Precipitation Index SPI, and MODIS time series images in April for period from 2000 to 2010 to calculate the Normalized Difference Vegetation Index NDVI.
Endowing a task-oriented dialogue system with adaptiveness to user personality can greatly help improve the performance of a dialogue task. However, such a dialogue system can be practically challenging to implement, because it is unclear how user pe
Damascus is located at the southern part of Syria not far from the Dead sea
fault system, in particular from one of its branches the Sergayah fault. The
latter in particular is a quite active fault system and the main seismic source for
both destr
This study aims to identify new determinants of fertility during the
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