Page - 632 - in Book of Full Papers - Symposium Hydro Engineering

the data rate in the time series ignoring the value of the variables. Therefore, to the mentioned reason, it can also be used for data with skidding. Meanwhile, it is not required to data with special distribution form (Zhang et al., 2000). Figure 4: Annual discharge time of the Galinak station (m3 / sec) for the water years from 1961-1962 to 2012-2013 2.4 REMOTE SENSING: The estimation of snow-covered surfaces, especially in mountainous areas, involves sufficient information and statistics. Today, the use of remote sensing and satellite images in determining the level of snow cover and the same parameters has had a significant improvement. In order to specify the snow cover level, firstly, eight days snow cover achieved by satellite data from 2000 to 2015 were received from NSIDC site in HDF format. And then the Mean snow level was extracted for each month in the GIS environ. The specifications of these data are shown in Table 4. Table 4: Specifications and spatial accuracy of satellite data Satellite Sensor Spatial accuracy (meter) Time accuracy (Day) Product type Data date Terra MADIS 500 8 Days 10A2 2000-2014 (January, February, March) 3. RESULTS 3.1 RESULTS OF METEOROLOGICAL AND HYDROLOGIC VARIABLES TREND TEST 632