Gāoyuàn

Gaoyuan stood within the low-lying country affected by the Xiaoqing River and the waters descending from the hills of central Shandong. Flooding linked its fortunes to neighbouring Zouping, Zhangqiu, Boxing and Le'an. Waterways that served one district could spread damage across several others, making drainage a problem that extended well beyond the county boundary.

In 1544 renewed silting and flooding prompted the appointment of Chen Gui to investigate the river system. His examination identified water arriving from the Luo River and converging at Jiaya Bay as a major cause of inundation around Gaoyuan. Rather than treating navigation as the overriding objective, he considered diverting this flow westward. An older channel, the Zhimaigou, had been opened from Gaoyuan during the Chenghua reign. By Chen's time parts lay under floodwater and others had become fields, so he advised against simply reopening its former course. Gaoyuan's sixteenth-century history thus records competing choices about rivers, cultivated land and the practical limits of restoring earlier hydraulic works.