The focus of this book is on how we manage stormwater in our cities: water that falls from the sky and is not immediately absorbed by soil or plants, thus running over the surface to join a stream, and eventually flowing to the ocean. The increase in runoff that results from urbanization has traditionally been viewed as a liability, and public agencies have responded by designing flood control facilities with one primary objective: the protection of life and property. While this is the most important objective of flood management, it is time for traditional engineering approaches to broaden...