首页|Solute transport and geochemical modeling of the coastal quaternary aquifer,Delta Dahab Basin,South Sinai,Egypt

Solute transport and geochemical modeling of the coastal quaternary aquifer,Delta Dahab Basin,South Sinai,Egypt

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The wadi dahab delta is in a dry,arid coastal zone within Egypt's south Sinai Peninsula's eastern por-tion.The primary water source is the Quaternary coastal alluvial aquifer.The groundwater salinity varies from 890 to 8213 mg/L,with a mean value of 3417 mg/L.The dis-solved major ions have been used to calculate the seawater mixing index(SWMI)using a linear equation that dis-criminates the groundwater mostly affected by water-rock interaction(SWMI 1＞)and other samples mixed with Seawater(SWMI＜1).The isotopic composition of groundwater for specifically chosen groundwater samples ranges from-0.645‰ to+5.212‰ for δ18O and from-9.582‰ to+22.778‰ for δ2H,where the seawater represented by a Red Sea water sample(δ18O+1.64‰-δ2H+9.80‰)and reject brine water are considerably enriched the isotopic groundwater values.The geochemical NETPATH model constrained by the dissolved significant ions,isotopes,and the rock aquifer forming minerals as phases indicate the mixing percent with the seawater ran-ges from 9％to 97％of seawater from 91％to 3％of original recharge water.According to the SEAWAT 3-D flow models,seawater has penetrated the Northeastern Dahab delta aquifer,with the intrusion zone extending 1500 m inland.The salt dissolution,upwelling of saline water,recharge from the upstream mountain block,and seawater encroachment are the primary aspects contribut-ing to the deterioration of groundwater quality.These findings may have significance for effective groundwater withdrawal management in arid locations worldwide with similar hydrogeological systems.

Groundwater geochemistrySeawater intrusionSolute transportSEAWAT

Amira Samy、Mustafa Eissa、Seham Shahen、Moustafa M.Said、Rabab M.Abou-shahaba

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Division of Water Resources and Arid Land,Department of Hydrogeochemistry,Desert Research Center,Cairo,Egypt

Egypt Desalination Research Center of Excellence,Desert Research Center,Cairo,Egypt

Center for Water Supply Studies,S&E-Physical &Environmental Sciences,Texas A&M University Corpus Christi,Corpus Christi,USA

Department of Chemistry,Faculty of Science(Girls),Al-Azhar University,Yousef Abbas Str,Nasr City,P.O.Box:11754,Cairo,Egypt

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2024

10.1007/s11631-023-00637-3

地球化学学报(英文版)
中国科学院地球化学研究所

地球化学学报(英文版)

EI
影响因子：0.33
ISSN：2096-0956
年,卷(期)：2024.(1)
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