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This study, it was aimed to reveal the traces of hydrological drought in the Manavgat Stream. The possible trend on flow series was investigated for a better interpretation of the traces of hydrological drought. Hydrometric time series constitute the basic material of the study. In this context, the traces of hydrological drought were investigated using the stream flow drought index (SDI). The possible trend on flow series was investigated using the Mann-Kendall test and the Mann-Kendall rank correlation test statistics for a better interpretation of the SDI values. ( ) and ′ ( ) graphs drawn from the Mann-Kendall rank correlation test statistic were used to reveal the starting date of the trend. According to the SDI results, the traces of hydrological drought were detected at the selected stations in the Manavgat Stream at different time and class intervals. For the reference period k = 4, the hydrological drought that occurred in different class intervals in 49% of the hydrometric time series at the EIE0901 Homa station was determined. Moreover, for the reference period k = 4, the hydrological drought that occurred in different class intervals in 42% of the hydrometric time series at the EIE0912 Sinanhoca station was determined. Significant decreasing trend at 95% confidence interval was detected at EİE0901 Homa station for the reference period k = 2, k = 3, and k = 4. In the hydrometric time series of EİE0912 Sinanhoca station, no significant trend was detected at 95% confidence interval for the reference period k = 2, k = 3, and k = 4. The breakthrough point predicted by SDI calculations for the EİE0901 Homa station was clarified as 1948 by trend analyzes.
This study, it was aimed to reveal the traces of hydrological drought in the Manavgat Stream. The possible trend on flow series was investigated for a better interpretation of the traces of hydrological drought. Hydrometric time series constitute the basic material of the study. In this context, the traces of hydrological drought were investigated using the stream flow drought index (SDI). The possible trend on flow series was investigated using the Mann-Kendall test and the Mann-Kendall rank correlation test statistics for a better interpretation of the SDI values. ( ) and ′ ( ) graphs drawn from the Mann-Kendall rank correlation test statistic were used to reveal the starting date of the trend. According to the SDI results, the traces of hydrological drought were detected at the selected stations in the Manavgat Stream at different time and class intervals. For the reference period k = 4, the hydrological drought that occurred in different class intervals in 49% of the hydrometric time series at the EIE0901 Homa station was determined. Moreover, for the reference period k = 4, the hydrological drought that occurred in different class intervals in 42% of the hydrometric time series at the EIE0912 Sinanhoca station was determined. Significant decreasing trend at 95% confidence interval was detected at EİE0901 Homa station for the reference period k = 2, k = 3, and k = 4. In the hydrometric time series of EİE0912 Sinanhoca station, no significant trend was detected at 95% confidence interval for the reference period k = 2, k = 3, and k = 4. The breakthrough point predicted by SDI calculations for the EİE0901 Homa station was clarified as 1948 by trend analyzes.
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