Designing a Better Pavement Surface Water Drainage System

Designing a Better Pavement Surface Water Drainage System

In the last blog post, our architects in Warrington gave their advice for designing an efficient surface water drainage system for roofs, outlining a variety of considerations about roof fall and installation advice. In this blog, we’ll be looking at the factors you should keep in mind when doing designing any paved surface water drainage systems.

We’ll also be looking at road and highway drainage, and the various techniques used when designing drainage systems. Keep in mind when planning any drainage system you should always consult professional architects in Warrington to ensure everything is up to standard and adequately draining without any irregularities.

Collection and Connection Systems of Pavement Surface Water Drainage

There are two primary methods that most paved areas manage their surface water drainage, yard gully collection and channel connection. Yard gully collection is a paved area with a fall of 1:60 to a gully. Of course, the size of this paved area will decide the number of gullies necessary; however a gully every 400 square meters is a relatively safe guideline to keep by. Know that if a gully connects to a combined sewer, then it should be contained with a minimum 50 mm water seal.

The second method is a channel connection system that has a fall of 1:120 and is connected to the drainage system. Architects in Warrington typically have this made of clayware or concrete, and will always either be half-open or have a mesh grating to allow water to pass down.

Highway and Road Drainage According to Architects in Warrington

Very rarely people will realise that the construction of roads and highways has a significant effect on the natural surface drainage of a particular area. It is imperative to consider highway and road drainage to prevent the excess collection of water on road surfaces which can make for hazardous driving conditions and compromise the overall stability of an area or structure.

Our architects in Warrington always consider various road elements present like hard shoulders, foot or cycling paths, and carriageways when planning a highway or road drainage system. Just as important, always consider the expected intensity of rainfall, size of the catchment area and the permeability of your surfaces when planning any drainage system.

The Differences Between Urban and Rural Roads

It’s important to remember that urban and rural roads will have some differences making specific methods better suited for each. Most urban streets will have channels by the side of the road which discharge through gullies into stormwater sewers. These gullies should be about 25-30 meters apart from each other; however, this number is flexible as pavings and verges can and should be graded towards channels. This will reduce the required amount of drainage points and allow for better surface water drainage.

Similarly to some urban roads, larger rural roads will also use gullies, piped sewers or soakaways. However, in most cases, rural roads will be smaller and use basic openings or channels to feed water to roadside ditches. Rural roads are often the ones that are most overrun with surface water, but always take extra care in your planning of drainage systems for any paved road or highway.