Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Marie Peppler, Physical Scientist, USGS, presents Robert Holmes' "Flood hydrology: Gaps & challenges in observations, fundamental understanding, assessments and situational awareness."
Public Domain.
