Surface drainage is a necessity if you want to remove excess water from your land in a controlled manner and as quickly as possible.
Wet soil problems are usually due to both excess surface and subsurface water. It is important to realize that surface drains will only remove surface water, which is why usually a combination of surface drains and another type of drain, such as french drains, is necessary to fix a drainage issue.
Never-the-less surface drains are an essential and very useful tool to manage wet soil and to keep standing water from sitting on the surface. When used in the right location for the right reasons they can greatly improve pooling and other drainage issues.