Answer:
Year after year, masses of people were left homeless and forced to flee to mountaintops. After relentless urging from his advisors, the emperor appointed a distant relative to control the ongoing flood. This distant relative spent nine years building dams, etc.. to barricade the waters.
Explanation:
Hope this helped <3
In result of wet conditions and also poor hygiene, a lot of the soldiers would suffer from 'trench foot'. hope this helped :)
I think it is the declared purpose