Runoff is water that moves over a surface rather than soaking into the ground or remaining where it fell.
What this means at your property
Rainwater from a roof, paved area or neighboring grade can collect near an entry or foundation. The wet location may be the destination of the flow rather than its starting point. A drainage investigation should consider that route.
What should I document during a recurring problem?
From a safe location, record where water travels, where it accumulates and when it reaches the building. Share changes to grading, paving or downspouts so the proposed repair addresses the source and path.