Water salinity changes of the gauging stations along the Amu

The Amu Darya is the most important river in Central Asia, as the river water used for agricultural, industrial and domestic purposes. The Kelif, Kerki, Chardjow, Darganata, Kipchak, Takhiatash, and Samanbay gauging stations (g/s) are located in the Amu Darya River. The water salinity of the Amu Darya River at the Kelif, Chardjow, and Darganata g/s were decreased from 0.649-0.469, 0.823-0.614, and 0.99-0.696 g/l to 1991-2010; at the Takhiatash, and Samanbay g/s has been raised from 1.218-1.562, and 1.126-1.46 g/l to 1991-2000. We have predicted the seven gauging stations along the river water salinity from 2010 to 2020 used by the Holt's Linear Trend Forecasts Method, and the results are then applied in the prediction of water salinity. The forecast suggested that the Amu Darya river water salinity of the Kelif g/s will be increased to around 0.495 g/l in 2020; of the Kerki, Chardjow, Darganata, Kipchak, Takhiatash, and Samanbay g/s will decreases to approximately 0.483, 0.602, 0.668, 0.484, 1.104, and 0.825 g/l by 2020.