Question

سیل خیلی از زمین های کشاورزی مجاور رودخانه را برده است

Answer 1

The (heavy) flood has swept away many of the riverside farming / farm lands.

 sweep sth⇔away
to completely destroy something or make something disappear
　houses swept away by the floods (Webster)

 

Answer 2

Flood has washed out many part of ground by the river