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dc.contributor.authorJadoon, Khan
dc.contributor.authorAlmashharawi, Samir
dc.contributor.authorHanafy, Sherif
dc.contributor.authorSchuster, Gerard T.
dc.contributor.authorMissimer, Thomas
dc.date.accessioned2016-05-15T13:21:44Z
dc.date.available2016-05-15T13:21:44Z
dc.date.issued2016-04-07
dc.identifier.citationAnthropogenic-Induced Changes in the Mechanism of Drylands Ephemeral Stream Recharge, Western Saudi Arabia 2016, 8 (4):136 Water
dc.identifier.issn2073-4441
dc.identifier.doi10.3390/w8040136
dc.identifier.urihttp://hdl.handle.net/10754/609457
dc.description.abstractWadi aquifers in Saudi Arabia historically have been recharged primarily by channel loss (infiltration) during floods. Historically, seasonal groundwater levels fluctuated from land surface to about 3 m below the surface. Agricultural irrigation pumping has lowered the water table up to 35 m below the surface. The geology surrounding the fluvial system at Wadi Qidayd consists of pelitic Precambrian rocks that contribute sediments ranging in size from mud to boulders to the alluvium. Sediments within the wadi channel consist of fining upward, downstream-dipping beds, causing channel floodwaters to pass through several sediment sequences, including several mud layers, before it can reach the water table. Investigation of the wadi aquifer using field observation, geological characterization, water-level monitoring, geophysical profiles, and a hypothetical model suggests a critical water level has been reached that affects the recharge of the aquifer. The wetted front can no longer reach the water table due to the water uptake in the wetting process, downstream deflection by the clay layers, and re-emergence of water at the surface with subsequent direct and diffusive evaporative loss, and likely uptake by deep-rooted acacia trees. In many areas of the wadi system, recharge can now occur only along the channel perimeter via fractured rocks that are in direct horizontal hydraulic connection to the permeable beds above and below the water table.
dc.description.sponsorshipThe authors thank the Water Desalination and Reuse Center and the Department of Earth Science and Engineering for the use of field and laboratory equipment. Funding for this research was provided by the Center and Department and from discretionary faculty research funding.
dc.language.isoen
dc.publisherMDPI AG
dc.relation.urlhttp://www.mdpi.com/2073-4441/8/4/136
dc.rightsThis is an open access article distributed under the Creative Commons Attribution License (CC BY) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. http://creativecommons.org/licenses/by/4.0/
dc.subjectwadi aquifers
dc.subjectaquifer depletion
dc.subjectchannel recharge
dc.subjectanthropogenic changes
dc.subjectfractured rock aquifer
dc.titleAnthropogenic-Induced Changes in the Mechanism of Drylands Ephemeral Stream Recharge, Western Saudi Arabia
dc.typeArticle
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Division
dc.contributor.departmentCenter for Subsurface Imaging and Fluid Modeling
dc.contributor.departmentDepartment of Earth and Engineering Science
dc.contributor.departmentEarth Science and Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)
dc.identifier.journalWater
dc.eprint.versionPublisher's Version/PDF
dc.contributor.institutionDepartment of Civil Engineering, COMSATS Institute of Information Technology, Abbottabad 22060, Pakistan
dc.contributor.institutionU.A. Whitaker College of Engineering, Florida Gulf Coast University, 10501 FGCU Boulevard South, Fort Myers, FL 33965-6565, USA
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)
kaust.personJadoon, Khan
kaust.personAlmashharawi, Samir
kaust.personHanafy, Sherif M.
kaust.personSchuster, Gerard T.
refterms.dateFOA2018-06-13T11:45:33Z


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