Browsing by Author "Aydin, H."

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Characterization and Conceptualization of a Relict Karst Aquifer (Bilecik, Turkey)
(ZRC SAZU, Zalozba ZRC, 2013) Aydin, H.; Ekmekçi, M.; Soylu, M.E.
The carbonate rocks in Turkey have diferent hydrogeological properties as a result of controlling karstifcation factors, such as lithostratigraphy, source of energy gradient, tectonic activity, type of erosion base, fuctuation in sea level, and climate change in their extended areas. Tis study was undertaken for the characterization and conceptualization of the hydrogeolog-ical behavior of a unique example of the dissected relict karst aquifer, which is known as the Harmanköy-Beyyayla Karst System (HBKS) in Central Turkey. In order to obtain the conceptualization of the HBKS, properties of recharge, fow, storage, and discharge was analyzed. Te contribution of allogenic-point recharge to the Beyyayla and Döşkaya aquifers occurs from the Beyyayla and Tozman sinkhole with approximately 85% of total recharge. Te rest of the recharge takes place as autogenic-difuse/point type from the limestone rock-mass. Te recharge on the Nardi{dotless}n aquifer originates from direct precipitation onto the limestone area mainly as autogenic-difuse and, to lesser extent, as autogenic-point. Groundwater fow occurs as conduit fow at the Beyyayla and Döşkaya aquifers and as dispersed fow at the Nardi{dotless}n aquifer. Te evaluation of all parameters shows that the HBKS can be divided into three distinct sub-catchments, namely, the Beyyayla, Döşkaya, and Nardi{dotless}n, while it has two diferent hydrogeological system so Beyyayla and Döşkaya have similar characteristics.
The Effect of Quaternary Alluvium on Strong Ground Motion: 2011van Earthquakes
(TMMOB - Jeoloji Muhendisleri Odasi, 2012) Selçuk, L.; Aydin, H.
The distribution of damaged buildings observed from October 23 and November 9, 2011 Van earthquakes shows that a major portion of damage occurred at settlement areas underlain by alluvial soils. The effect of alluvial soil on strong ground motion and structural damage can be seen by comparing two strong ground motion records of the Van province, earthquake of 09 November 2011 (Mw:5.6). One record at Edremit on travertine bedrock had a peak horizontal acceleration of 0.10 g. The other one, at the city center of Van province, at a distance of 15 km from the epicenter in Quaternary alluvium, had the accelaration value of 0.25 g. The effect of soil on the ground motion is about 2.5. In this study, the lateral and vertical distribution of the soil were obtained using a total of 81 geotechnical borehole data with depths ranging from 10-25 m. Soil amplification values computed at the alluvial site based on measured shear wave velocity show reasonably good agreement with the observed motions. The earthquake damage was determined to be high at local areas of relatively poor soil conditions such as cohesionles and loose soil, high groundwater. In addition to the soil conditions, there is no doubt that the use of low quality materials and low construction technologies have caused higher damage at central districts of Van province. Considering the soil conditions, both ground deformation (soil amplification, liquefaction) and cycling loading will increase the loss of lives and property in the central districts of Van province. Therefore, in order to minimize the possible damage of a potential earthquake, ground conditions should be considered at the Van settlement area.
Evaluation of Nardin Cave (Bilecik) Deposits in Relation To Paleoenvironmental Conditions
(Hacettepe Universitesi Yerbilmleri, 2007) Soylu, M.E.; Ekmekçi, M.; Aydin, H.
The limestone, cropping out in the Western-Central Anatolian Region represents a unique example of dissected and relict karst types. It is important evidence the processes that affected the evoluation of karstic rocks in this region which has distinctive characteristics compared with the other karst regions of Turkey. The Nardin cave deposits were examined in relation to processes which control karstification of the region. In this framework, chemical and physical properties of the deposits in Nardin cave, which formed in Bilecik limestone of Jurassic age, were evaluated in relation to determination of climatic and hydrologic processes of the region. Identifiable columnar sections of cave deposits preserved on the cave walls were drawn. Color, texture, age of the formation and iron contents of the deposits were investigated. According to chemical analyses performed, brown colored deposits have high iron content and yellowish colored deposits have high organic matter content U/Th dating analyses indicate that the cave was completely closed by interior deposits about 150 ky before present. Cave morphology, stratigraphy of the cave interior deposits and chemical analyses suggest that after catastrophic rainy period, two cold climatic spells and one mild climatic spell prevailed successively in the region.
Jihad in Islam
(Universiti Sultan Azlan Shah, 2012) Aydin, H.
The word Islam as a verbal form is derived from the infinitive Arabic trilateral root of silm, salamet (peace and security). Therefore, if its nature has been peace and salvation, how can we interpret Jihad verses? The subject of this article focuses on this point. In this article, the writer discusses the subject and the impact of this apparent paradox on the direction of Islam according to Quranic verses. The interpretation of Jihad that the writer intends to explore best fits the religion which in its nature is peace and salvation.