they made pipes
levees are used to prevent flooding of a river to the adjoing country-basically prevent flooding.
marshland prevent flooding to a nearby town by temporarily storing water
levees are used to prevent flooding of a river to the adjoing country-basically prevent flooding.
they dont they increase the risks of flooding.
they built dams to keep the flooding out of their cities
They needed dikes to control flooding.
There are a number of reasons why trees could prevent flooding. These trees can absorb the excess water for example.
no
marshlands prevent flooding to a nearby town by temporarily storing water
a levee
Levees prevent flooding from rivers that overflow their banks.
The Chinese have built dams to prevent flooding.