Floodplain mapping involves determining amount of flooding (hydrology), the height of flooding (hydraulics), and the land areas impacted by flooding. A floodplain or flood hazard map has two key ...

Google has quietly added elevation data to bike routes in its Maps service, providing better intel for intrepid cyclists. The feature, which launched Friday, seems to work for much of the U.S. and ...

Visit NAP.edu/10766 to get more information about this book, to buy it in print, or to download it as a free PDF. The nation is presently making an investment of more than $200 million per year in ...