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dc.contributorCetin, Mahmuten_US
dc.contributorKarnez, Ebruen_US
dc.contributorTopcu, Sevilayen_US
dc.contributorKirda, Cevaten_US
dc.contributorRyan, Johnen_US
dc.contributorOguz, H.en_US
dc.contributorDingil, Mahmuten_US
dc.contributorOztekin, Erenen_US
dc.creatorIbrikci, Hayriyeen_US
dc.identifier.citationHayriye Ibrikci, Mahmut Cetin, Ebru Karnez, Sevilay Topcu, Cevat Kirda, John Ryan, H. Oguz, Mahmut Dingil, Eren Oztekin. (1/9/2010). Monitoring Groundwater Nitrate Concentrations under Irrigation in the Cukurova Region of Southern Turkey. Fresenius Environmental Bulletin, 19 (9), pp. 1802-1812.en_US
dc.description.abstractAgricultural output globally is largely dependent on fertilizer use, particularly nitrogen (N), especially in irrigated cropping. While a substantial amount of the applied N is taken up by the crop to stimulate growth and yield, much of it does not positively affect crop growth due to losses by leaching, volatilization, denitrification, and immobilization. Thus, N fertilizer-use efficiency is less than optimum in most production systems. Loss of N by leaching to the groundwater has economic, health and environmental implications. In a study area with poor drainage outlet conditions due to the low-lying drainage basin, Yemisli Irrigation District in the Cukurova region of southern Turkey, we determined the variability over space and time of ground-water nitrate (NO3) concentrations during years 2007 and 2008. Relatively shallow groundwater observation wells (56), up to 3 meters deep, were dug at various locations to represent the most common crops and soils in the irrigation district. Groundwater depth was measured, and water samples were collected (five times in 2007 and four times in 2008) and analyzed for NO3 concentration. Regional maps of groundwater depth and NO3 concentration were developed from the point data by using the inverse distance- squared interpolation technique. Groundwater NO3 concentrations ranged between 0.78 and 56.38 mg L-1 in 2007 and between 1.48 and 52.79 mg L-1 in 2008, only exceeding the critical 50 mg L-1 concentration in 0.4 to 5.4 % of the wells, depending on the sampling dates The NO3 concentrations were highest in February and in June-July. The peaks suggest that there is a likelihood that in the early part of the wheat cropping season (February), NO3 could be leached by the high rainfall in winter; similarly, N losses can occur by irrigation in June-July during the growth of cotton (Gossypium hirsutum) and corn (Zea mays). In most of the area (>60% of total), groundwater NO3 concentrations ranged from 20 to 50 mg L-1, and were thus marginal relative to the threshold pollution level (30 mg L-1). As both N fertilizer use and the extent of irrigation are likely to increase in this region of Turkey, so too will the poor drainage conditions inevitably continue. Consequently, regular groundwater NO3 monitoring, as adopted in this study, is advisable, and is also applicable to irrigated areas in other regions of the world.en_US
dc.publisherParlar Scientific Publicationsen_US
dc.rightsCopyrighted; Non-commercial educational use onlyen_US
dc.sourceFresenius Environmental Bulletin;19,Pagination 1802-1812en_US
dc.subjectnitrate concentrationen_US
dc.subjectdrainage observation wellsen_US
dc.subjectirrigation districten_US
dc.subjectspatial and temporal variabilityen_US
dc.titleMonitoring Groundwater Nitrate Concentrations under Irrigation in the Cukurova Region of Southern Turkeyen_US
dc.typeJournal Articleen_US
cg.contributor.centerInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.contributor.centerCukurova University - CU Turkeyen_US
cg.contributor.centerCankiri Karatekin University - Karatekinen_US
cg.contributor.funderInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.contributor.projectCommunication and Documentation Information Services (CODIS)en_US
cg.contributor.project-lead-instituteInternational Center for Agricultural Research in the Dry Areas - ICARDAen_US
cg.coverage.regionWestern Asiaen_US
cg.isijournalISI Journalen_US
dc.identifier.statusOpen accessen_US
cg.journalFresenius Environmental Bulletinen_US

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