Evaluating the impact of climate change on groundwater resources in a small Mediterranean watershed

Ali Ertürk, Alpaslan Ekdal*, Melike Gürel, Nusret Karakaya, Cigdem Guzel, Ethem Gönenç

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

61 Citations (Scopus)

Abstract

Western Mediterranean Region of Turkey is subject to considerable impacts of climate change that may adversely affect the water resources. Decrease in annual precipitation and winter precipitation as well as increase in temperatures are observed since 1960s. In this study, the impact of climate change on groundwater resources in part of Köyceğiz-Dalyan Watershed was evaluated. Evaluation was done by quantifying the impacts of climate change on the water budget components. Hydrological modeling was conducted with SWAT model which was calibrated and validated successfully. Climate change and land use scenarios were used to calculate the present and future climate change impacts on water budgets. According to the simulation results, almost all water budget components have decreased. SWAT was able to allocate less irrigation water because of the decrease of overall water due to the climate change. This resulted in an increase of water stressed days and temperature stressed days whereas crop yields have decreased according to the simulation results. The results indicated that lack of water is expected to be a problem in the future. In this manner, investigations on switching to more efficient irrigation methods and to crops with less water consumption are recommended as adaptation measures to climate change impacts.

Original languageEnglish
Pages (from-to)437-447
Number of pages11
JournalScience of the Total Environment
Volume499
DOIs
Publication statusPublished - 15 Nov 2014

Bibliographical note

Publisher Copyright:
© 2014 Elsevier B.V.

Funding

Authors would also like to thank Istanbul Technical University, Scientific Research Fund , for supporting the study through project “Estimation of Nutrient Loads by SWAT in Köyceğiz-Dalyan System ( Grant No: 33622 )”, and Gökhan Cüceloğlu for his efforts The study was supported by the European Community 7th Framework Project GENESIS ( 226536 ) on groundwater systems.

FundersFunder number
European Community 7th Framework Project GENESIS226536
Istanbul Technical University, Scientific Research Fund
SWAT33622

    Keywords

    • Groundwater dependent ecosystems
    • Hydrological modeling
    • Köyceğiz-Dalyan Watershed
    • Regional climate models
    • SWAT

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