Simple measurement of leakage flow rate in undersea tunnel by employing analytical chemical technique

In the maintenance of undersea tunnels, careful attention must be given to control of leakage flow rates. Conventional leakage flow measurement relying on triangular-notched weirs was time-consuming and inefficient. In response, Kyushu Railway Company (JR Kyushu) and the Railway Technical Research Institute, Japan Railways have developed jointly a simple and...