Abstract
In the diagnosis of irrigation and drainage channels and tunnels, the difference between the present performance and the required performance that agricultural facilities should originally demonstrate must be understood. According to the result of diagnosis, the provision is decided whether extending the service period by the repair and reinforcement, or improving the function by renewal. For that reason, it is important to monitor the progress of defective events and to evaluate the performance of agricultural facilities. Authors developed continuous digital scanning system which can record defective events as a digital format, and also developed penetro meter which could measure the strength of ground at the back of concrete lining in tunnels. Through a result of field tests, which had many kind of scales and types, it was demonstrated that the new system could take not only visual information about agricultural irrigation channels and tunnels quickly, efficiently, and accurately, but also efficient information about the back of concrete lining in tunnels.
