干旱区生态环境知识资源中心(Arid): Use of 1-D subsurface thermal profiles to characterize the groundwater flow in the Central Nile Delta region

Arid

DOI	10.1007/s12517-020-5090-9
	Use of 1-D subsurface thermal profiles to characterize the groundwater flow in the Central Nile Delta region
	Salem, Zenhom E.; El-Nahrawy, Abdelaziz
通讯作者	Salem, Zenhom E.
来源期刊	ARABIAN JOURNAL OF GEOSCIENCES
ISSN	1866-7511
EISSN	1866-7538
出版年	2020
卷号	13 期号:3
英文摘要	Borehole temperature logs of twelve wells were analyzed to clarify the connection among groundwater and the subsurface thermal conditions in the central part of the Nile Delta as an irrigated land in an arid area. The annual average surface air temperature amid the interval from 1997 to 2017 was 22.74 degrees C, and the annual increment is 0.0629 degrees C year(-1). This surface warming influenced the subsurface thermal system. Thermal gradient of the conducted temperature-depth (T-D) profiles varies from - 0.009 degrees C m(-1) (well 4) to 0.0098 degrees C m(-1) (well 12). The vertical change in the thermal gradient values lower than zero was detected in wells 1, 3, 4, 5, 6, 7, 9, and 11 while wells that have gradient higher than zero were wells 2, 8, 10, and 12. The T-D logs were numerically examined and the outcomes compared with standard curves to predict the vertical groundwater stream direction and speeds. The logged wells could be divided into three groups. Wells were characterized by downward groundwater flow as wells 1, 4, 7, 8, and 10. Wells were of upward groundwater flow as in wells 2, 3, 5, 9, 11, and 12. Wells were characterized with upward and downward groundwater flows as well 6. Vertical downward groundwater flow velocities in the study area ranged from 11.53 cm year(-1) in well 10 at a depth of 200-236 m to 69.20 cm year(-1) in well 1 at a depth of 32 m. The upward groundwater flow velocities varied from 498.26 cm year(-1) in well 11 at a depth below 60 m to 10.65 cm year(-1) in well 12 at a depth below 115 m. Seawater intrusion effect was estimated from the upward groundwater movement in the northern part (well 11), and the downward movement of the freshwater was reflected from well 10 in the southern part of the study area. Downward flow noticed in wells 7 and 6 reflects the recharge effect of Damietta and Rosetta Nile branches, respectively. The groundwater flow velocity and flow direction change with depth could be related to the aquifer heterogeneity, groundwater pumping, and surface water-groundwater interaction.
英文关键词	Nile Delta groundwater Subsurface temperature Flow system Flow velocity Geothermal gradient
类型	Article
语种	英语
国家	Egypt
收录类别	SCI-E
WOS记录号	WOS:000514334900003
WOS关键词	TEMPERATURE-DEPTH PROFILES ; SURFACE CLIMATE-CHANGE ; GEOTHERMAL MEASUREMENTS ; BOREHOLE TEMPERATURES ; STABLE-ISOTOPES ; HEAT-TRANSFER ; NAGAOKA AREA ; WATER-FLOW ; FLUID-FLOW ; RECONSTRUCTION
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/2XILL650/314072
作者单位	Tanta Univ, Dept Geol, Fac Sci, Tanta, Egypt
推荐引用方式 GB/T 7714	Salem, Zenhom E.,El-Nahrawy, Abdelaziz. Use of 1-D subsurface thermal profiles to characterize the groundwater flow in the Central Nile Delta region[J],2020,13(3).
APA	Salem, Zenhom E.,&El-Nahrawy, Abdelaziz.(2020).Use of 1-D subsurface thermal profiles to characterize the groundwater flow in the Central Nile Delta region.ARABIAN JOURNAL OF GEOSCIENCES,13(3).
MLA	Salem, Zenhom E.,et al."Use of 1-D subsurface thermal profiles to characterize the groundwater flow in the Central Nile Delta region".ARABIAN JOURNAL OF GEOSCIENCES 13.3(2020).