An analysis of terrestrial water storage changes of a karstic, endorheic basin in central Anatolia, Turkey

Cihangir Koycegiz*, Omer Lutfi Sen, Meral Buyukyildiz

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Water budget components of endorheic basins of semi-arid and karstic characters are difficult to assess. In this study, we attempt to estimate the water budget components of the Konya Endorheic Basin (KEB), which is a semi-arid, karstic basin in central Anatolia, using The Gravity Recovery and Climate Experiment mission (GRACE) observations and Global Land Data Assimilation System (GLDAS) data over the period 2002-2019. We also investigate the trends and sub-trends in the time series of the hydrometeorological parameters. The results indicate that the available water potential in the basin has a decreasing trend over the study period. Precipitation and evapotranspiration show increasing trends in the basin, however, the other hydrometeorological parameters demonstrate decreasing trends. Both Terrestrial Water Storage Anomaly (TWSA) and groundwater level decrease significantly (20.21 mm/yr and 122.34 mm/yr, respectively). The dry 2008 and subsequent wet year created a hydrological breaking point in the time series. The weights of soil moisture and groundwater storages are relatively large amongst the TWSA components (49.61% and 33.12%, respectively). The surface water storage anomaly comes at the third place with a 14% weight. It is assessed that the groundwater storage system responds to precipitation with a delay of 6 months. Limestone zones respond more sharply to groundwater depletion than alluvial zones. It should be noted that the GRACE and GLDAS data could be used together to successfully estimate the water budget components for sustainable management of the limited water resources of the basin.

Original languageEnglish
Pages (from-to)688-702
Number of pages15
JournalEcohydrology and Hydrobiology
Volume23
Issue number4
DOIs
Publication statusPublished - Oct 2023

Bibliographical note

Publisher Copyright:
© 2023

Funding

We would like to thank the Jet Propulsion Laboratory (JPL) and the Center for Space Research (CSR) for GRACE RL06 mascon solutions, GES DISC for GLDAS hydrological models. Also, we thank DMI and DSI for providing climate and groundwater level data, respectively. O. L. Sen acknowledges the support from the 2232 International Fellowship for Outstanding Researchers Program of the Scientific and Technological Research Council of Turkey (TUBITAK) through grant 118C329. The financial support received from TUBITAK does not mean that the content of the publication is approved in a scientific sense by TUBITAK. This study proceeded from Cihangir KOYCEGIZ's PhD Thesis (Koycegiz, 2022). We would like to thank the Jet Propulsion Laboratory (JPL) and the Center for Space Research (CSR) for GRACE RL06 mascon solutions, GES DISC for GLDAS hydrological models. Also, we thank DMI and DSI for providing climate and groundwater level data, respectively. O. L. Sen acknowledges the support from the 2232 International Fellowship for Outstanding Researchers Program of the Scientific and Technological Research Council of Turkey (TUBITAK) through grant 118C329 . The financial support received from TUBITAK does not mean that the content of the publication is approved in a scientific sense by TUBITAK. This study proceeded from Cihangir KOYCEGIZ’s PhD Thesis ( Koycegiz, 2022 ).

FundersFunder number
Center for Space Research
Jet Propulsion Laboratory
Türkiye Bilimsel ve Teknolojik Araştırma Kurumu118C329

    Keywords

    • GLDAS
    • GRACE
    • Karstic
    • Onyutha's test
    • Trend
    • Water budget

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