The dykes along the boundary are drainage channels for adjacent farmland.
Examples of 'drainage channel' in a sentence
drainage channel
Below ground, these are usually tanked with waterproof membrane, although some designers prefer to dig a drainage channel around the perimeter of the foundations.
Times, Sunday Times (2006)
Further, you can seek an injunction (to order your neighbour to reopen the second drainage channel) and damages (the cost of repairing your property).
Times, Sunday Times (2017)
Probing proved it to be a drainage channel 1½ft deep, with slab walls and an earthen floor.
Times, Sunday Times (2011)
Watch out for deep drainage channels when you start running downhill.
Times, Sunday Times (2012)
Overshot willows with bushy crowns lined the drainage channels.
Times, Sunday Times (2009)
The army had been called in to dig drainage channels and remove debris to prevent flooding in case a deluge hits the area.
Times, Sunday Times (2018)
Trees were ripped up, drainage channels and sewers blew open, small bridges were demolished, cars were washed away and houses were inundated.
Times, Sunday Times (2013)
In the most common 'open angle' type, this usually occurs slowly due to tiny drainage channels in the eye becoming blocked.