The River Crouch,Essex
FloodNet is deployed at The River Crouch, Essex. This particular site was selected because it is ideal for studying spatio-temporal phenomena and for providing a test site for more sophisticated flood monitoring studies, including that of spatial prediction elements to provide a sophisticated forecasting model for unusual flood events
FloodNet was deployed and activated on 30th April, 2004 and presently consists of 6 nodes each equipped with a pressure sensor. The sensor is positioned underwater close to the riverbed and has a thin breath pipe connecting it to the surface, allowing it to compare pressure at its location to that in the atmosphere. The difference in pressure can then be used to estimate water depth. The deployment topology was determined based on the topology of a hydraulic model of the study site and was not limited by technology considerations such as radio range.
The well-controlled nature of this environment coupled with the robust FloodNet system, allows for the sensed data to be interpreted on the fly within FloodNet. The significance of the FloodNet system from a hydrological standpoint is that phenomena such as flooding can be mapped and assessed in real time over a broad region, which includes the direction of a moving flood front, rather than a collection of individual soil moisture readings. This development will fulfil the FloodNet true potential as an intelligent, distributed instrument with potential for multiple applications.
See an aerial map of the sensor locations.