Snow as one of the precipitation forms has important effect in hydrological cycle and water resources

management. Snow monitoring particularly in mountainous basin without modern technology is very difficult

according to temporal and spatial variation of snow property. Remote sensing is one of advanced

technology in measurement of snow properties. MODIS imagery is one of new sensors that provide the

possibility of snow cover measurement.

In this research, the ability of MODIS imagery for detection of snow cover from other earth phenomena

such as cloud has been assessed. Some methods of snow cover detection have been applied in Haraz

basin that is one of important basin in North of Iran. Results showed that false color image of moderate

infrared bands has ability of snow and cloud detection and the best algorithm is the one that can envisage

digital number of pixels deviation.