Canals so the water didn't flood the city.
they build dams
qin shi huang
A dam
to stop the water from flooding
Emperor Qin Shi Huang
the people in new Orleans were tied of the city flooding every year so they build levee which in french means "rising water" to keep the city from flooding
Some people in the southern United States adapted to Mississippi River floods by building their houses on stilts. The Army Corps of Engineers built many levees along the river to keep flood waters back.
he built it in the 3rd century
he executed them or sent them to build the great wall.
the great wall of china
they built dams to keep the flooding out of their cities
Because he want to defence his country________________________________________________________________________He had to build the great wall in order to protect the northern borders of his country from the invasions of his country's enemies.