2015 Volume 21 Pages 61-66
Recently, there were cases that the monitoring of the water surface elevation accidentally stopped since water gauges were destroyed during large flooding causing missing data without any alternates; e.g., the case of northern Kyusyu heavy rains in July 2012. Those events highlighted the serious issues of current hydrological observational system. For preparing alternative measurement system, authors investigate how to improve measurement accuracy of reading the staff gauges, and how to implement automatic reading system with using the high-quality CCTV camera, which is operationally used in Yatsushiro River Office. This study reports the results and the future tasks.
