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Context 1
... Upper Euphrates River has its headwaters in Turkey and flows through Syrian territory before entering Iraq. Turkey occupies the upper portion of the river basin, as seen in Figure 3. The river basin extends over six countries: Iraq, Turkey, Syria, Saudi Arabia, Kuwait and Jordan. ...
Context 2
... Karasu sub-basin, Murat sub-basin and Tohma sub-basin have been selected to use prediction model. A detailed investigation has been made to find if there has been any water storage, regulation and water use development works in the period over which the flow measurement data were gathered ( Figure 3). ...
Context 3
... Upper Euphrates River has its headwaters in Turkey and flows through Syrian territory before entering Iraq. Turkey occupies the upper portion of the river basin, as seen in Figure 3. The river basin extends over six countries: Iraq, Turkey, Syria, Saudi Arabia, Kuwait and Jordan. ...
Context 4
... Upper Euphrates River has its headwaters in Turkey and flows through Syrian territory before entering Iraq. Turkey occupies the upper portion of the river basin, as seen in Figure 3. The river basin extends over six countries: Iraq, Turkey, Syria, Saudi Arabia, Kuwait and Jordan. ...
Context 5
... Karasu sub-basin, Murat sub-basin and Tohma sub-basin have been selected to use prediction model. A detailed investigation has been made to find if there has been any water storage, regulation and water use development works in the period over which the flow measurement data were gathered ( Figure 3). ...
Citations
The main purpose of this study is to map the spatio-temporal variation of hydrological drought severities in the Euphrates Basin by using Kriging, Radial Based Function (RBF), Inverse Distance Weighting (IDW), Local Polynomial Interpolation (LPI), and Global Polynomial Interpolation (GPI) methods and to determine the distribution of hydrological drought trends. For this purpose, 18 streamflow observation stations and grid-based ERA5 reanalysis data were employed in and around the Euphrates Basin. The standardized runoff index (SRI) was calculated on monthly, 3-month, and 12-month time scales to determine hydrological droughts. Hydrological drought trends were determined by Mann Kendall (MK) and Modified Mann Kendall (MMK) tests. According to SRI, spatial-temporal distributions of droughts were mapped by Kriging, RBF, IDW, GPI, and LPI methods in the Geographical Information Systems environment. The LPI and Kriging method was selected as the most effective methods to predict hydrological droughts based on the cross-validation error. As a result of the trend analysis, the predominance of decreasing SRI trends in May (61.1%), June (72.2%), July (55.6%), August (61.1%) indicates that the basin is at risk of hydrological drought, especially in summer. According to the maps of spatial droughts, the widespread distribution of droughts in the basin indicated that the basin was greatly affected by hydrological droughts. For this reason, it has been emphasized that transboundary water effective management between riparian countries, planning of water structures, and effective implementation of the drought management plan is of great importance.
The objective of this paper is to determine the trend and to estimate the streamflow of the Gökırmak River. The possible trend of the streamflow was forecasted using an autoregressive integrated moving average (ARIMA) model. Time series and trend analyses were performed using monthly streamflow data for the period between 1999 and 2014. Pettitt's change point analysis was employed to detect the time of change for historical streamflow time series. Kendall's tau and Spearman's rho tests were also conducted. The results of the change point analysis determined the change point as 2008. The time series analysis showed that the streamflow of the river had a decreasing trend from the past to the present. Results of the trend analysis forecasted a decreasing trend for the streamflow in the future. The decreasing trend in the streamflow may be related to climate change. This paper provides preliminary knowledge of the streamflow trend for the Gökırmak River.
