How does the topography and geology affect storm water management?

Mountains, ridges and highpoints are what dictate the path of storm water as it makes its way across land into streams and rivers. But entering a river and flowing downstream is not the only way water moves. Percolation, infiltration and groundwater flow are all other types of water movement within a watershed.

What is a Watershed?

How is Pennsylvania Unique?

The Geological Story of Pennsylvania
Sinkholes in Pennsylvania