As part of the EC H2020 NAIAD project a series of real time flood alert gauges and Natural Flood Management (Nature Based Solution) monitoring systems have been installed in river basins throughout Europe.  These gauges are low cost, open source designs developed as part of the FreeStation project.  Below is live data from the gauge in the Teise (Medway).  Further information on this gauge can be found here.  The data shows live hourly and daily mean water level in relation to the level that would cause flooding of surrounding land by the river.  Live  air pressure and temperature data are also shown alongside a 5 day forecast of the same.

Upstream/downstream of Leaky dam