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    Hydrological Properties of the Derme Karstic Springs by Using Hydrogeochemical Analyses and Environmental Isotope Techniques
    (Wiley-Blackwell, 2016) Dursun, Omer Faruk; Celiker, Murat; Firat, Mahmut
    In this study, determination of recharging mechanism of the Derme karst spring by hydrogeochemical analysis and environmental isotope techniques are aimed. The Derme karst spring is an important karst spring that is located in the eastern part of Turkey, meets the domestic water need of Malatya province having a population of 750000, and has an average flow rate of 2.7m(3)/s. Water samples were taken from eight different springs from May to October 2011 for physicochemical and isotopic analyses (oxygen 18, deuterium, tritium) in order to determine the catchment mechanisms and the hydrodynamic structures of these karstic springs. The hydrogeochemical classification of spring waters was performed through a piper diagram. The results indicated that all of the springs were characterized by the calcium bicarbonate type. It was found that the deuterium excess value of the karstic springs was ranging from 13.42 to 18.84%, and that these springs were fed by both territorial and marine origin rainfalls. It was considered that the springs in the karstic region were under the influence of different karstic systems.
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    Trend analyses for discharge-recharge of Tacin karstic spring (Kayseri, Turkey)
    (Pergamon-Elsevier Science Ltd, 2021) Celiker, Murat; Yukseler, Ufuk; Dursun, Omer Faruk
    Vast research is conducted around the world in order to determine the effects of climate change on water resources. Determining and preserving the rechanging characteristics of karstic springs has an important place in water resources management studies. In the present study, the variation trends of climate parameters, affecting the discharge trend of the Tacin karstic spring in Kayseri, Turkey and the spring discharge, were analyzed. For this purpose, the monthly mean discharge flow of the karstic spring between the years 1975 and 2017 and the monthly average temperatures and precipitation parameters belonging to the meteorological stations close to the spring (Kayseri, Pinarbast, Gemerek and Sarlosla) were adopted. In the trend analyses, the non-parametric Spearman Rho (SR), Mann Kendall (MK) and sen-Innovative Trend analysis tests (Sen-ITA) were used in addition to the non-linear tests. Accordingly, a reduction was observed in the change trend of the precipitation parameter of Pinarbasi and Kayseri stations and an increase in the respective measure of the Gemerek and Sarlosla stations while a noticeable decrease took place in the flow discharge of the Tacin karstic spring. The temperature parameter underwent a similar increase in all of the four stations meanwhile. Consequently, the decrease trend in the flow discharges of the Tacin karstic aquifer was inferred to stem from the reduction in the precipitation trend, observed in the southern part of the karstic aquifer.