久保田富次郎, 濵田康治, 人見忠良, 山口康晴, 申文浩, 農業水利施設における濁度の遠隔監視と浮遊物質、全リン、放射性Csの濃度推定, 農村工学研究所技報, 218, 77-88, 2016.

With the development of the information and communications technology (ICT) , remote observation and control of irrigation water is becoming easy and less costly with each year. However, more sophisticated technology would still be required for future irrigation management with environmental considerations such as conservation of water quality. In this study, a low-cost remote observation system for monitoring water quality was investigated and methods for estimating concentrations of suspended solids, total phosphorus, and radioactive cesium by the system using the output of turbidity sensors were evaluated. The proposed system could achieve remote water sampling at an arbitrary time through PCs or smartphones. This feature enables safe water sampling in restricted areas or during stormy weather. The overall features of the system are as follows: i) 8 analogue inputs for analogue sensors and 2 digital inputs for rainfall gauges; ii) remote water sampling at arbitrary times through PCs or smartphones; iii) utilization of mobile communication line ; and iv) 10 min interval for default observation . Good correlations were found not only between turbidity and total suspended solids but also between turbidity and total phosphorus. The concentrations of total suspended solids and total phosphorus could be estimated from turbidity values using these relationships . Furthermore, the concentrations of radioactive Cs could also be estimated in a similar manner.

Key words: total phosphorus, radioactive cesium, turbidity, suspended solids, remote monitoring system