Philadelphia’s new zoning code went live late last month, but a key environmental provision—providing a 50-foot buffer to development for the city’s rivers and streams—won’t take effect until City ...

Unfortunately, this book can't be printed from the OpenBook. If you need to print pages from this book, we recommend downloading it as a PDF. Visit NAP.edu/10766 to get more information about this ...

Introducing the medium -- How to study a stream -- Potential sources of data (how to avoid reinventing the weir) -- Getting to know your stream -- How to have a field day and still collect some useful ...

Measuring a stream’s level is essential for everything from flood forecasting to navigation, and has been a key duty of hydrologists for decades. A hydrographer with the United States Geological ...

Advances in hydrology are greatly needed and approaches that employ hypotheses to guide research have the potential to contribute to future advances. One line of reasoning in the USGS research program ...