Abstract
Bureau of Sewerage of Tokyo Metropolitan Government has a radar rain gauge system, ‘Tokyo Amesh’. Rainfall information system is used to make the operation of pump stations and wastewater treatment plants more efficiently. The rain radars of Tokyo Amesh have worked for a long time. We are replacing the rain radars because of the aging of the facilities. Observations of additional meteorological parameters with the newly developed radars would increase the precision and relativity. As future efforts, methods to rapidly detect urban heavy rain and to decrease cost of maintenance of ground rain gauges will be addressed.
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