Storm & Groundwater

Storm water is generally considered to be rainwater that has landed on a roof and as such can be considered to be clean water albeit non-potable. Groundwater is rainfall that has now landed on the ground surface and is therefore no longer considered to be clean. Under current sustainable drainage legislation (SUDS) it has become the responsibility of the land owner to provide for the rainwater that lands on their property. Therefore, attention to designing and constructing appropriate storm and groundwater systems is imperative to ensure buildings and land does not suffer damp / waterlogged or flood conditions.

Generally there are two options – Do you harvest this valuable resource and then use it to wash the car, water the garden, flush the toilets and even in the washing machine using a rainwater harvesting system OR do you dispose of it into a soak-away (if ground porosity is sufficient) or into ditches and streams if available or with appropriate permission into the main sewer drains.

Grosvenor Buildings and Landscape are able to offer the full range of solutions for rainwater that falls on your garden and buildings. Our experience includes a number of successful installations of rainwater harvesting systems and even an innovative groundwater harvesting system for a major National Trust garden which allows the collection of excess water used in the nursery that falls to the ground after the watering of all the potted plants to be collected, along with the rainwater that has fallen, filtered and put back into tanks ready for watering the nursery plants once more. Additionally we have designed and constructed many land-drainage systems to improve the growing conditions in wet lying gardens. As a matter of course we always consider the storm water issues related to the landscaping / construction projects we have been tasked with.