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.
These measurements were used to study the erosion processes and to estimate the severity of the sedimentation problem. Rod person (lower left) and instrument persons (upper right) give scale.
