Research on Improvement of Accuracy of Year-Round Runoff Calculation Using Snow Distribution Calibrated From Satellite Information

Key Points

• To enhance the accuracy of year-round runoff predictions by calibrating snow distribution sourced from satellite data.
• Developed a methodology for snow area determination using Himawari-9 satellite data.
• Applied the corrected snow area to runoff calculations.
• Evaluated the methodology in two dam basins on the Sea of Japan side, known for high winter cloud cover.
• Reduced errors in both overestimation and underestimation of snowmelt runoff.
• Demonstrated effectiveness of the satellite-based method in improving snow depth accuracy.
• Enhanced runoff prediction precision and efficiency in water resource management and hydropower production.