"We are fortunate that the rain events so far have not put pressure on our major banks, but many of our smaller rivers have experienced high flows and the banks are now in a saturated state.
"The stopbanks require careful management and it is very important that there is enough grass to prevent scouring in a flood event. Stock damage can increase the potential for this to happen."
Thomas said he appreciated the effort farmers put in to control stock damage caused by grazing through the year, but said stock needed to be grazed elsewhere to avoid any damage.
"The stopbanks not only protect property and production worth billions of dollars, but they also ensure the safety of many in our community. All it takes is one breached section of stopbank to flood hundreds of hectares of farmland, and potentially impact homes and people's lives."
• A copy of the stopbank grazing guidelines pamphlet is available online at www.horizons.govt.nz/publications-feedback/publications/keeping-people-safe with hard copies available on request.