Arid
DOI10.1007/s12517-011-0439-8
Hydrogeological studies on the Nubian sandstone aquifer in El-Bahariya Oasis, Western Desert, Egypt
Hamdan, Ali M.1; Sawires, Rashad F.2
通讯作者Hamdan, Ali M.
来源期刊ARABIAN JOURNAL OF GEOSCIENCES
ISSN1866-7511
出版年2013
卷号6期号:5页码:1333-1347
英文摘要

The current study aimed to evaluate hydrogeologically the Nubian sandstone aquifer in El-Bahariya Oasis. It represents the main water-bearing horizon in the study area and consists of continental elastic sediments, mainly sandstone alternating with shale and clays. The general flow lines are directed from SW to NE direction, as detected from the constructed potentiometric head contour map. The piezometric surface reaches 149 m in El-Heiz area at the southern part, while it reaches 90 m at the northern, reflecting higher pressure head of the aquifer in the southern part. The map also illustrates that the southern part is considered as the most promising location for development. The structural elements play an important role in the deposition and distribution of the sedimentary succession of the Nubian sandstone sediments. Consequently, this sedimentary pattern affects the occurrences and movements of the groundwater within the aquifer system. Along the structurally high areas, in the study area, the piezometric head increases, while the reverse is recorded along the structurally low areas. The step-drawdown tests data were carried out by calculating the aquifer loss coefficient (B) and the well loss constant (C). The B values are smaller compared with C values, indicating that the aquifer under pressure has a behavior of leaky aquifer; therefore, it shows hydraulic connection with surrounding formation. The values of well efficiency range from 78.50% to 87.76%. Analysis of 12 pumping test data (constant discharge tests) was carried out in order to calculate the Nubian aquifer hydraulic parameters (transmissivity, hydraulic conductivity, and storage coefficient). The transmissivity values decrease from 3,045 m(2)/day in the southern part (El-Heiz area) to 236 m(2)/day in the northeastern part (El-Harra area). Accordingly, the aquifer classified as a high to moderate potentiality. Transmissivity contour map observes gradual increase of transmissivity values from the southern to northeastern direction. This may be due to the increase of shale or clay content in the concerned aquifer in that direction. The storage coefficient values range between 1.04 x 10(-4) and 5.22 x 10(-3), as obtained from the results of pumping test analysis, which ensure that the Nubian sandstone aquifer is classified as semi-confined to confined aquifer type. The S values show a decrease from southwest to northeast direction as detected from S-map. The hydraulic conductivity values vary from to 0.46 m/day in the northern part to 10.88 m/day in the southern part with an average of 5.67 m/day. According to the classification based on K values, the aquifer is mainly composed of coarse sand.


英文关键词Hydrogeology Nubian sandstone aquifer El-Bahariya Oasis Western Desert
类型Article
语种英语
国家Egypt
收录类别SCI-E
WOS记录号WOS:000318443000003
WOS类目Geosciences, Multidisciplinary
WOS研究方向Geology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/175832
作者单位1.South Valley Univ, Fac Sci Aswan, Dept Geol, Aswan, Egypt;
2.Assiut Univ, Fac Sci, Dept Geol, Assiut, Egypt
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GB/T 7714
Hamdan, Ali M.,Sawires, Rashad F.. Hydrogeological studies on the Nubian sandstone aquifer in El-Bahariya Oasis, Western Desert, Egypt[J],2013,6(5):1333-1347.
APA Hamdan, Ali M.,&Sawires, Rashad F..(2013).Hydrogeological studies on the Nubian sandstone aquifer in El-Bahariya Oasis, Western Desert, Egypt.ARABIAN JOURNAL OF GEOSCIENCES,6(5),1333-1347.
MLA Hamdan, Ali M.,et al."Hydrogeological studies on the Nubian sandstone aquifer in El-Bahariya Oasis, Western Desert, Egypt".ARABIAN JOURNAL OF GEOSCIENCES 6.5(2013):1333-1347.
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