The error came to light during an investigation into a drainage problem.

You really need details of the underground drainage problem, as this may be particular to your house and may not have been satisfactorily resolved.

The flooding and drainage problem of the city requires for both short-term and long-term solutions.

However, if the acid mine drainage problem were remedied, it would be capable of serving as a recreational trout stream.

Winter rains aggravated the severe drainage problem in the region and the entire base became a quagmire of slippery clay.