Monitoring water quality and quantity of national watersheds in Turkey

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dc.authoridEvrendilek, Fatih/0000-0003-1099-4363
dc.contributor.authorOdemis, Berkant
dc.contributor.authorEvrendilek, Fatih
dc.date.accessioned2024-09-18T21:00:40Z
dc.date.available2024-09-18T21:00:40Z
dc.date.issued2007
dc.departmentHatay Mustafa Kemal Üniversitesien_US
dc.description.abstractNational data from the hydrological network for 38 rivers out of 25 watersheds were used to detect spatial and temporal trends in water quality and quantity characteristics between 1995 and 2002. Assessment of water quality and quantity included flow rate, water temperature, pH, electrical conductivity, sodium adsorption rate, Na, K, Ca+Mg, CO3, HCO3, Cl, SO4, and boron. Among the major ions assessed on a watershed basis, Turkish river waters are relatively high in Ca+Mg, Na and HCO3, and low in K and CO3. The watersheds in Turkey experienced a general trend of 16% decrease in flow rates between 1995 and 2002 at a mean annual rate of about 4 m(3) s(-1), with a considerable spatial variation. Similarly, there appeared to be an increasing trend in river water temperature, at a mean annual rate of about 0.2 degrees C. A substantial proportion of watersheds experienced an increase in pH, in particular, after 1997, with a maximum increase from 8.1 to 8.4 observed in Euphrates (P < 0.01). Kendall's tau test revealed increasing trends of EC and SAR concentrations that exceeded existing standards, particularly, in the Meric, kizilirmak and Big Menderes watersheds where intensive agricultural activities take place. Such continued levels may threaten biotic integrity and both drinking and irrigation water quality of rivers. Best multiple linear regression (MLR) models constructed both annually and monthly differed in R-2 values in accounting for variations of pH and water temperature only. The findings of the study can provide a useful assessment of controls over water quality and quantity and assist in devising integrated and sustainable management practices for watersheds at the regional scale in Turkey.en_US
dc.identifier.doi10.1007/s10661-006-9574-1
dc.identifier.endpage229en_US
dc.identifier.issn0167-6369
dc.identifier.issn1573-2959
dc.identifier.issue1-3en_US
dc.identifier.pmid17171235en_US
dc.identifier.scopus2-s2.0-34548742449en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage215en_US
dc.identifier.urihttps://doi.org/10.1007/s10661-006-9574-1
dc.identifier.urihttps://hdl.handle.net/20.500.12483/12812
dc.identifier.volume133en_US
dc.identifier.wosWOS:000249403900021en_US
dc.identifier.wosqualityQ3en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.indekslendigikaynakPubMeden_US
dc.language.isoenen_US
dc.publisherSpringeren_US
dc.relation.ispartofEnvironmental Monitoring and Assessmenten_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectwatershed managementen_US
dc.subjectsustainable developmenten_US
dc.subjectwater qualityen_US
dc.subjectwater quantityen_US
dc.subjectclimate changeen_US
dc.subjectTurkeyen_US
dc.titleMonitoring water quality and quantity of national watersheds in Turkeyen_US
dc.typeArticleen_US

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