What should I know about surface water drainage? November 7th 2018, by Ian Lishman

Any planning permission obtained by a housing developer for a new site includes conditions relating to managing surface water drainage.

The construction of large areas of hard landscaping can lead to significant water run-off. This is particularly true of formerly greenfield sites, where trees and hedges intercepted some rainfall, and the ground itself held a certain volume of water prior to discharging to land drains and water courses.

The drainage system for a new development has to connect into existing drains and sewers somewhere, and failing to adequately manage that additional water volume can lead to drains becoming overwhelmed and, ultimately, flooding.

Increasingly, home buyers expect to be able to park as close to the house as possible. Where some concession is made to soft landscaping, it is generally expected to be as low maintenance as possible, reducing opportunities for rainfall interception. This excess of hard landscaping needs to be balanced with the requirement to provide a sustainable urban drainage system (SUDS).

Planning for a SUDS should therefore take place early in the process of developing site proposals so that relevant discussions can be held with both the local authority and an experienced drainage contractor, and so that works can progress smoothly once construction starts.

Providing adequate surface water drainage isn’t just about responding to past rainfall data and current weather patterns. It’s also about considering our changing climate and providing a solution that can help protect people, homes and natural habitats from the impact of future extreme rainfall events.

About FACE

For nearly two decades, FACE have delivered high quality civil engineering works on projects of all sizes. Our new turnkey service allows housing developers, whether small or large, to work with us and build a project-specific package of services that FACE then delivers.

The package can include highway works carried out under a section 278 agreement, drainage construction and groundworks. Acting as a single point of contact for multiple aspects of the infrastructure means we can offer improved coordination of works and minimise potential delays.

Find out more and enquire about our turnkey packages here.