© Hydrogeology And Hydrochemistry Of A Shallow Alluvial Aquifer, Western Saudi Arabia Al-Shaibani, AM SPRINGER, HYDROGEOLOGY JOURNAL; pp: 155-165; Vol: 16 King Fahd University of Petroleum & Minerals http://www.kfupm.edu.sa Summary geological and hydrochemical study was conducted on a shallow alluvial , Wadi Wajj, in western Saudi Arabia to assess the influence of protection s on groundwater quality. The hydrochemistry was assessed up-gradient and adient from potential contamination sources in the main city in dry and wet prior to and after the installation of major drainage and wastewater facilit jj is an unconfined aquifer where water is stored and transmitted through ed and weathered bedrock and the overlying alluvial sediments. Natur e to the aquifer is about 5% of rainfall-runoff. Hydrochemistry of the aquife temporal and seasonal changes as influenced by protection measures a l runoff. Both groundwater and runoff showed similar chemical signat is mostly of chloride-sulfate-bicarbonate and sodium-calcium ater downstream of the city, though of poorer quality than upstream, showed cant improvement after the installation of a concrete runoff tunnel ter treatment plant. Concentrations of many of the groundwater quali ors (e.g., TDS, coliform bacteria, and nitrate) exceed US Environmen ion Agency drinking-water standards. Heavy metal content is, however, within le limits by local and international standards. The chemical analyses the strong influence of stream runoff and sewage water on the groundwater . References: Copyright: King Fahd University of Petroleum & Minerals; http://www.kfupm.edu.sa

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Hydrogeology And Hydrochemistry Of A Shallow Alluvial

Aquifer, Western

Saudi Arabia

Al-Shaibani, AM

SPRINGER, HYDROGEOLOGY JOURNAL; pp: 155-165; Vol: 16

King Fahd University of Petroleum & Minerals

http://www.kfupm.edu.sa

Summary

A hydrogeological and hydrochemical study was conducted on a shallow alluvial

aquifer, Wadi Wajj, in western Saudi Arabia to assess the influence of protection

measures on groundwater quality. The hydrochemistry was assessed up-gradient and

down-gradient from potential contamination sources in the main city in dry and wet

seasons prior to and after the installation of major drainage and wastewater facilities.

Wadi Wajj is an unconfined aquifer where water is stored and transmitted through

fractured and weathered bedrock and the overlying alluvial sediments. Natural

recharge to the aquifer is about 5% of rainfall-runoff. Hydrochemistry of the aquifer

shows temporal and seasonal changes as influenced by protection measures and

rainfall runoff. Both groundwater and runoff showed similar chemical signature,

which is mostly of chloride-sulfate-bicarbonate and sodium-calcium type.

Groundwater downstream of the city, though of poorer quality than upstream, showed

significant improvement after the installation of a concrete runoff tunnel and a

wastewater treatment plant. Concentrations of many of the groundwater quality

indicators (e.g., TDS, coliform bacteria, and nitrate) exceed US Environmental

Protection Agency drinking-water standards. Heavy metal content is, however, within

allowable limits by local and international standards. The chemical analyses also

suggest the strong influence of stream runoff and sewage water on the groundwater

quality.

References:

Page 2: © Hydrogeology And Hydrochemistry Of A Shallow Alluvial Aquifer, Western Saudi Arabia Al-Shaibani, AM SPRINGER, HYDROGEOLOGY JOURNAL; pp: 155-165; Vol:

1.2.3.4.5.6.7.8.9.10.11.12.13.14.15.16.17.18.19.20.21.22.23.24.25.26.

*APHA, 1995, STAND METH EX WAT WA*EPA, 2004, 822R04005 US EPA*IT, 1967, FIN REP WAT SUPPL SU*PME, 2004, 140901 PME MIN DEF A*WHO, 1998, WHOEO981ABDULRAZZAK MJ, 1992, ARP6170 KACST, V1ABORIZAIZA OS, 1989, ARP675 KACSTALHAJJAR BJ, 1990, GROUND WATER, V28, P559ALHAJRI FY, 1974, HYDROLOGY WADI LIYYAALSAQABY A, 1975, GEOLOGY HYDROLOGY WAANDERSON MP, 1995, APPL GROUNDWATER MODANDREASSON PG, 1988, GEOLOGY CENTRAL TAIFBAZUHAIR AS, 1996, J HYDROL, V186, P153CARTER TA, 2001, 42 PST N CAR COOP EXDOMENICO PA, 1998, PHYS CHEM HYDROGEOLOFETTER CW, 2001, APPL HYDROGEOLOGYGHURM AA, 1980, THESIS ABDULAZIZ U JHEM JO, 1985, 2254 US GEOL SURVHORTON RE, 1945, GEOL SOC AM BULL, V56, P275HOUNSLOW AW, 1995, WATER QUALITY DATA AKEHEW AE, 2001, APPL CHEM HYDROGEOLOMATTHES G, 1982, PROPERTIES GROUNDWATSTRAHLER AN, 1957, T AM GEOPHYSICAL UNI, V38, P913TOTH J, 1963, J GEOPHYS RES, V68, P4795WOOD WW, 1995, GROUND WATER, V33, P458WOOD WW, 1996, GROUND WATER, V37, P2

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