Oxford Flood Network

The Oxford Flood Network is making a flood detection network in the UK, using low cost sensors and volunteers. They are sharing their code on Github and their results on the Flood_Network Twitter account. They encourage you to join their effort, and no high technology is necessary. The network incorporates both readings from automated sensors (about £250) as well as manual readings from gaugeboards or photos. New as of December 2015 is an interactive flood map. »