How did the Huang He change its course after the floods of the 1850s?

Following the floods of the 1850s, the Huang He (Yellow River) underwent a significant shift in its course. Due to the slackening of maintenance efforts on the levee system during the Taiping Rebellion (1850–1864), the river breached its banks and shifted to the north of the Shandong Peninsula, eventually settling into the course it occupies today.1

Prior to this change, the river had been relatively stable for more than 500 years, having previously flowed south of the Shandong Peninsula. This redirection was part of the river's historical pattern of radical course changes, driven by the accumulation of silt that elevates the riverbed above the surrounding countryside, making the North China Plain highly susceptible to dramatic channel shifts when levees fail.12