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Identification of nitrate sources in groundwater by δ15Nnitrate and δ18Onitrate isotopes: a study of the shallow Pleistocene aquifer in the Jericho area, Palestine

Khayat, Saed ; Geyer, Stefan ; Hötzl, Heinz ; Ghanem, Marwan ; Ali, Wasim

Acta hydrochimica et hydrobiologica, 2006-04, Vol.34 (1-2), p.27-33

Weinheim: WILEY-VCH Verlag

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  • Título:
    Identification of nitrate sources in groundwater by δ15Nnitrate and δ18Onitrate isotopes: a study of the shallow Pleistocene aquifer in the Jericho area, Palestine
  • Autor: Khayat, Saed ; Geyer, Stefan ; Hötzl, Heinz ; Ghanem, Marwan ; Ali, Wasim
  • Assuntos: Earth sciences ; Earth, ocean, space ; Engineering and environment geology. Geothermics ; Exact sciences and technology ; Hydrogeology ; Hydrology. Hydrogeology ; isotope ; Isotope geochemistry ; Isotope geochemistry. Geochronology ; N-15 isotope ; nitrate ; O-18 isotope ; Palestine ; pollution ; Pollution, environment geology ; Water quality ; Westbank ; Westbank, Palestine
  • É parte de: Acta hydrochimica et hydrobiologica, 2006-04, Vol.34 (1-2), p.27-33
  • Notas: ArticleID:AHEH200400615
    istex:74BF4B0C6A00D6548D6C750411FD61D0C3F01CDC
    ark:/67375/WNG-JP59R2Q8-X
  • Descrição: This study describes the impact of septic tanks on the groundwater quality of the shallow Pleistocene aquifer in Jericho area, Westbank, Palestine. Septic tanks are widely used for storage and disposal of sewage in the populated and agricultural city of Jericho. Routine hydrochemical tests for groundwater quality performed for several years identified the problem of a gradual nitrate increase, without pinpointing its definite sources. The geological formations of the Jericho area and the shallow nature of the Pleistocene aquifer, together with the mechanism of recharge, make the groundwater in this aquifer highly susceptible to contamination, particularly along sewers. The lithology of the Samara (high hydraulic conductivity) and the Lisan formation (low conductivity but increased infiltration along fractures) promote easy seepage of agricultural and anthropogenic inputs into the groundwater. Nitrate concentrations are elevated near septic tanks and animal farms, with nitrate values exceeding 74 mg/L. δ15Nnitrate and δ18Onitrate signatures suggest sewage and manure as the main sources of high nitrate concentration in the groundwater. Samples taken during the end of the dry season indicate that a slight denitrification in the aquifer.
  • Editor: Weinheim: WILEY-VCH Verlag
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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