Monitoring the Water Environment in Ruislip

The water levels in the main watercourses through Ruislip are routinely monitored by the Environment Agency and additional monitoring is undertaken by Hillingdon Council of rainfall and water level in a more localised area. This page introduces those resources and links to the data collected. Quick links to the charts available are also provided under the Flood Watch dropdown menu.

Hillingdon Council monitoring

Flood events in recent years have identified the need to have local monitoring of the water environment so that there is a greater understanding of how water moves through the local area during a flood and thus plan for more effective flood defences.

To complement Environment Agency monitoring of the River Pinn the Council have installed a rain gauge at King’s College and a sensor to monitor water level in the watercourse from Park Wood. The Council has been working with residents to understand the information that has been collected and has undertaken to share this information via the Ruislip Residents’ Association website here. The aim is for residents to be more informed of local conditions and to be able to take action when required.

Ruislip Gauges provides a link to two charts, one of rainfall at King’s College and a second of Park Wood water level. These are both updated at 15 minute intervals. Use the menu on the left to switch between the charts. The rainfall data shows how very local rainfall affects the volume of water leaving Park Wood and is being used to assess the effectiveness of Natural Flood Management installations in the Wood as well as providing some warning of potential flash flooding events.

Environment Agency monitoring

The Environment Agency publishes its water level monitoring data to the public on its flood information service website. Below are the monitoring stations affecting the Ruislip and Ruislip Manor area. These charts provide good indications of the water levels when flooding may occur.

River Pinn leaving Pinn Meadows.

Cannon Brook at Howletts Lane.

Yeading Brook leaving Pinner. This is the closest monitoring station for the Yeading Brook as it runs behind houses on Whitby Road. It does not directly signal flooding events at Whitby Road but may give an indication of when water volume in the Brook is abnormally high.