[Alternate history + time travel + water control infrastructure + smart strategy + single female protagonist]
Lu Chuan, an expert on major accident investigation, once crossed the river and became a river worker who was about to be executed because the river embankment burst.
Before the execution, he only said one sentence: "Don't cut it down yet. In three hours, this section of the embankment will still collapse."
Starting from a rescue race against floods, he investigated corruption, controlled floods, rectified water transportation, built factories, and strengthened military supplies, and put modern engineering and management experience into the soil of Dasheng bit by bit.
At first, he just wanted to repair a dike, clear his grievances and live. Later, when I looked back, I realized that I had successfully cultivated a prosperous age.