Probably, however, you are unlikely to see them until the vegetation grows back as they will mostly stay underground in their burrows. Removal of the vegetation – often necessary to keep waterways clear - not only removes the voles’ food but also takes away the cover that protects them from predators. For this reason it is probably not advisable to try and provide food for them. You should be able to see evidence of water voles out and about again once the vegetation starts to re-grow.
Please note - Water voles were given full legal protection in England & Wales on the 6th April 2008 by provisions under section 9 of Schedule 5 of the Wildlife & Countryside Act 1981 (as amended). Schedule 5 of this Act makes it an offence to intentionally or recklessly damage, destroy or obstruct access to any structure or place that a water vole uses for shelter or protection. It is also an offence to disturb, kill or injure a water vole or handle a water vole without a licence. (Wildlife and Countryside Act 1981). Disturbing or harming a water vole, damaging its habitat or destroying or blocking water vole burrows could lead to prosecution. Offences carry a maximum penalty of £5,000.
For further information on managing habitats for water vole please see this handout produced by Sussex Wildlife Trust - https://assets.sussexwildlifetrust.org.uk/managing-land-for-water-voles.pdf
Picture by Gavin Dowland