OXBOWA river rewriting its own map — bends sharpen, a neck pinches off, and a lake is stranded for good.

A river is never still, even when it looks it.

From the air, a lowland river is a single blue line drawn loose across a green plain. Freeze-frame it and nothing moves. Watch for a hundred years and the whole line crawls.

Water on the outside of a bend runs faster and deeper; it undercuts the far bank and carries the grains away. On the inside, the current slackens and drops its load, building a pale point bar of sand. Erode one bank, deposit on the other, and the bend does the only thing it can — it migrates, sideways and downstream, a metre or two a year.

So every bend you see is leaning. The sharp ones lean hardest. Left alone, they don't relax; they tighten, loop back on themselves, and reach for their own necks.

One flood, and a bend becomes a lake.

When a loop swings so far that its two ends nearly touch, the neck between them is a thin ribbon of land holding back the whole river.

The next big flood takes it. The water finds the short way across, abandons the long way round, and in a single season the meander is severed. The old loop, cut from the flow at both ends, fills with still water and silts up from the tips inward — an oxbow lake, a crescent of the river's own past left drying on the plain.

The channel is suddenly shorter and straighter. On the panel you can watch it happen: sinuosity climbs as the bends fatten, then drops in a single step the instant a neck gives way. Then the straightened river starts bending again. It always does.

Nothing here is scripted — each cutoff happens when, and only when, a neck finally closes.