Drainage Medway Review

Medway is actively investing in smarter drainage:

The current drainage model is rigid. We have channelized the river, straightened its banks, and built houses on the floodplain (the Medway Valley has seen significant development in recent decades). This has reduced the river's ability to drain naturally.

Much of Medway sits on London Clay, a dense, impermeable substrate. Unlike sandy or chalky soils, clay absorbs water very slowly. During heavy rain, the ground quickly becomes saturated, leading to rapid surface runoff, flash flooding on roads, and water pooling in low-lying gardens and underpasses.

When rain falls in Tonbridge or Tunbridge Wells, the water does not gently soak into aquifers; it runs off hard surfaces and clay soils, funneling rapidly into the tributaries. The drainage system here is fighting a losing battle against geography. The river acts as a massive drain for the entire region, and historically, the infrastructure was designed to move water away from settlements as quickly as possible. drainage medway

The current drainage works—just barely. It is a testament to Victorian grit and mid-20th-century civil engineering. However, it lacks resilience. The "drainage" of the Medway is currently operating on a knife-edge. Without a massive shift toward re-naturalization, floodplain reconnection, and the separation of sewage from storm water, the Medway will cease to be a river and will revert to what it naturally wants to be: a wild, uncontrollable floodplain.

In Medway, responsibility for drainage is shared between several parties:

Looking forward, the prognosis for Medway drainage is concerning. The "1-in-100-year" flood events are now occurring with much greater frequency. Medway is actively investing in smarter drainage: The

Local residents often face specific drainage challenges due to the region's diverse housing stock and environment:

In the Lower Medway (Rochester and Chatham), the issue is tidal. The drainage infrastructure must contend with the saltwater wedge pushing inland. Here, the system relies heavily on tidal defenses and flap valves. While generally effective, the reliance on gravity drainage is compromised, requiring constant maintenance to prevent the failure of aging outfalls.

They are responsible for the public sewer network and treatment works across the Medway River Basin Catchment . Much of Medway sits on London Clay, a

Medway's drainage infrastructure is under pressure from various factors:

You are responsible for the maintenance and repair of all drains located within your property boundary up to the point they connect to the public sewer. This includes regular cleaning to prevent blockages.

To further improve drainage in Medway, consider the following: