Contour Drainage 
Pipe drainage which follows the contours of land. The drainage trenches and pipes will typically be positioned at the bottom of a dip or base of a bank, as this will be the lowest point for water to naturally drain to.
Contour Drainage
Pipe drainage which follows the contours of land. The drainage trenches and pipes will typically be positioned at the bottom of a dip or base of a bank, as this will be the lowest point for water to naturally drain to.