How did the Yellow River’s course change during the 1194 flood?

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Yellow River basin and Yangtze River basin — Yellow River The Yellow River (Huang He) basin and the Yangtze River (Chang Jiang) basin and their drainage networks.

In 1194, the Yellow River underwent a significant course change following the rupture of protective levees. Prior to this event, the river had been running to the southern edge of the delta. After the dikes failed, a second arm of the river began flowing south of the Shandong Peninsula, altering its path across the North China Plain.1