2011.4-2012.3 Yearbook of NILIM
Research Summary

River Department

Reference Number	Y110302
Title	Study for safety evaluation against flood damage risk in considering of river-bed changes
Start-End Date	2009.4-2012.3
Division	River Division
Author	Head, Atsushi HATTORI Researcher, Yoshinori TAKEUCHI
Summary	We applied the reliability assessment method to administration and management of revetments towards bed-scour. The method can estimate the destruction property change of revetments by the measure of management. Therefore, the method can establish the frequency and longitudinal interval of the inspecting riverbed height, and can determine the length of preventive measure. The next, we examine the method of effective and efficient measurement of riverbed height. We confirmed that Swath echo sounding and aerial LiDAR system were rational methods on the situation of predominant inspection to riverbed, because 1) these have measuring accuracy of riverbed height, 2) these are able to scan riverbed consecutively and with high density.