What term describes a surge from incoming tide in a river?

• A. Surge from incoming tide in river
• B. Wave shoaling
• C. Rip current recognition
• D. Slack water

Answer: (A)

When the tide rises and pushes into a river, the water is driven upstream, creating a surge. That upward push of tidal water is the phenomenon described here, and it’s often associated with a tidal bore in rivers that magnify the effect. This term best matches the situation because it explicitly names the surge caused by the incoming tide moving upriver. The other options refer to different wave or current behaviors—wave height increasing in shallow coastal water, a lull in current between tides, or recognizing a type of current in surf zones—none of which describe the tide-driven surge up a river.