Rural communities are being reminded to keep grazing stock off stopbanks as the wetter months set in.
The message comes from Horizons Regional Council, whose central area engineer Cliff Thomas said it would ensure they are best able to perform their function as an essential flood protection asset.
Stopbanks provided protection for "thousands of people throughout the region".
Thomas said the reminder applied to both farmers and owners of lifestyle blocks.
"While stopbanks can be grazed by cattle less than 18 months old in summer when the ground is firm, grazing cattle is not permitted unless approval is given by river management staff between June 15 and September 15.