**3.2 Meteorological data**

There are four meteorological stations in the Hunza River basin such as Hunza, Naltar, Khunjerab, and Ziarat (**Table 2**). The Hunza meteorological station was installed by the Pakistan Meteorological Department (PMD) and the record is available from 2007 to onward whereas the other three stations were installed and managed by Water and Power Development Authority (WAPDA) and the record is available from 1995 to onward. The current study has employed daily data of temperature, precipitation, solar radiation, and relative humidity of Ziarat, Naltar, and Khunjerab meteorological stations. The required data of the aforementioned stations were acquired from the Surface Water Hydrology Project of the Water and Power Development Authority (SWHP-WAPDA), Pakistan from 1995 to 2009 (**Table 2**).
