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| 1 | Source identification of nitrate in the upper aquifer system of the Wadi Shueib catchment area in Jordan based on stable isotope composition显示文摘Groundwater forms the main freshwater supply in arid and semi-arid areas,and contamination of this precious resource is complicated by the slow rate of recharge in these areas.Nitrate contamination of groundwater is a global water quality problem,as it entails threat to human health as well as aquatic ecosystems.Source identification of contamination is the cornerstone and a prerequisite for any effective management program of water quality.Stable isotope composition of the dissolved nitrate(δ^(15)N-NO_(3)-andδ^(18)O-NO_(3)-)has been applied to identify NO_(3)-sources and the main transformation processes in the upper aquifer system(A1/2,A4,and B2/A7 aquifers)in the Wadi Shueib catchment area,Jordan.Moreover,the stable isotope compositions of the groundwater(δ^(2)H-H_(2)O andδ^(18)O-H_(2)O)in conjunction with the groundwater hydrochemistry were integrated to investigate the origin and evolution of the groundwater.Results revealed that groundwater in the study area is fresh and hard-very hard water,and mainly a Ca-Mg-Cl type.NO_(3)-concentration was in the range of 7.0-74.0 mg/L with an average of 37.0 mg/L.Most of the samples showed concentration higher than the natural background concentration of NO_(3)-(5.0-10.0 mg/L).Theδ^(2)H-H_(2)O andδ^(18)O-H_(2)O values indicated that the groundwater is meteoric,and of Mediterranean origin,with a strong evaporation effect.Theδ^(15)N-NO_(3)-values ranged between 6.0‰and 11.3‰with an average of 8.7‰,and theδ^(18)O-NO_(3)-values ranged between 1.6‰and 5.9‰with an average of 3.4‰.These values are in conformity with the stable isotope composition of nitrate derived the nitrification of wastewater/manure,and soil NH4.Nitrification and denitrification are the main transformation processes affecting nitrogen species.Statistical analysis revealed no significant differences in theδ^(2)H-H_(2)O andδ^(18)OH_(2)O values,andδ^(15)N-NO_(3)-andδ^(18)O-NO_(3)-values for the three aquifers(A1/2,A4,and B2/A7),indicating that the groundwater of these aquifers has the same origin,and a common source of pollution. | Mutawakil OBEIDAT Muheeb AWAWDEH Noor AL-KHARABSHEH Ahmad AL-AJLOUNI | 2021 | Journal of Arid Land2021，13，4： | 3 |
| 2 | Root form and canal morphology of mandibular premolars in a Jordanian population 显示文摘 | Awawdeh LA Al - Qudah AA | 2008 | Int Endod J2008，41，3： | 1 |
| 3 | Spectrophotometric detection of pentachlorophenol (PCP)inwater using immobilized and water-soluble porphyrins 显示文摘 | Awawdeh A M Harmon H J | 2005 | Biosensors and Bioelectronics2005，，20： | 1 |
| 4 | Evaluation of aquifers vulnerability to contamination in the Yarmouk River basin,Jordan,based on DRASTIC method 显示文摘 | Awawdeh M M Jarndat R A | 2010 | Arabian Journal of Geosciences2010，3，3： | 1 |
| 5 | Root canal morphology of mandibular incisors in a Jordanian population 显示文摘 | AI -Qudah AA Awawdeh LA | 2006 | Int Endod J2006，39，11： | 1 |
| 6 | Root canal morphology of mandibular incisors in a Jordanian population显示文摘 | Al-Qudah AA Awawdeh LA | 2006 | Int Endod J2006，39，11： | 1 |
| 7 | Some fixed point theorems for mappings on complete G-metric spaces显示文摘 | Mustafa Z Obiedat H Awawdeh F | 2008 | Fixed Point Theory andApplications2008，，： | 1 |
| 8 | Root canal morphology of man- dibular incisors in a Jordanian population 显示文摘 | A1-Qudah AA Awawdeh LA | 2006 | Int Endod J2006，39，11： | 1 |
| 9 | Rurninal degradability and lysine bioavailability of soybean meals and effects on performance of dairy cows显示文摘 | Awawdeh MS Titgerneyer EC Drouillard JS Beyer RS Shirley JE | | 0，，： | 1 |
| 10 | Ruminal degradability and lysine bioavailability of soybean meals and effects on performance of dairy cows 显示文摘 | Awawdeh M Titgemeyer E Drouillard J | 2007 | J Dairy Sci2007，90，10： | 1 |
| 11 | Root form and ca-nal morphology of Jordanian maxillary first premolars 显示文摘 | Awawdeh L Abdullah H Al - Qudah A | 2008 | JEndod2008，34，8： | 1 |
| 12 | Evaluation of aquifers vulnerability to contamination in the Yarmouk River basin, Jordan, based on DRASTIC method 显示文摘 | Awawdeh M M Jaradat R A | 2010 | Arabian Journal of Geosciences2010，3，3： | 1 |
| 13 | Root canal morphology of mandibular incisors in Jordanian population 显示文摘 | Al-Qudah AA Awawdeh LA | 2006 | Int Endod J2006，39，11： | 1 |
| 14 | Spectrophotometric Detection of Pentachlorophenol (PCP) in Water Using Immobilized and Water-soluble Porphyrins 显示文摘 | Awawdeh A M Harmon H J | 2005 | Biosens Bioelectron2005，20，： | 1 |
| 15 | Spectrophotometric detection of pentachlorophenol (PCP) in water using immobilized and water-soluble porphyrins显示文摘 | A. Mufeed Awawdeh H. James Harmon | 2004 | Biosensors and Bioelectronics2004，，8： | 1 |
| 16 | Quantitative analysis of substance P,neurokinin A and calcitonin gene related peptide in pulp tissue from painful and healthy human teeth 显示文摘 | Awawdeh L Lundy FT Shaw C | 2002 | Int Endod J2002，35，1： | 1 |
| 17 | Quantitative analysis of substance P,neurokinin A and calcitonin gene-related peptide in pulp tissue from painful and healthy human teeth显示文摘 | Awawdeh L Lundy F T Shaw C | 2002 | Int Endod J2002，35，： | 1 |
| 18 | Effects of energy source on methionine utilization by growing steers显示文摘 | SCHROEDER G F TITGEMEYER E C AWAWDEH M S | 2006 | Journal of Animal Science2006，84，6： | 1 |
| 19 | Root and canal morphology of mandibular first and second molar teeth in a Jordanian population 显示文摘 | AL-QUDAH AA AWAWDEH LA | 2009 | Int Endod J2009，42，9： | 1 |
| 20 | Root canal morphology of mandibularincisors in a Jordanian population显示文摘 | Al-Qudah AA Awawdeh LA | 2006 | Int Endod J2006，39，11： | 1 |
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