An official website of the United States government. Here's how you knowHere's how you know
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.
Latest Earthquake | Chat Share
Pennsylvania Water Science Center and the Next Generation Water Observing Systems (NGWOS) Program are implementing new technologies for streamflow estimation at sites in Pennsylvania where conventional measurement techniques are inadequate.
Large-Scale Particle Image Velocimetry (LSPIV) is an emerging technique to obtain measurements of surface velocity in streams and rivers. USGS scientists are applying LSPIV in Chartiers Creek in Carnegie, and Frankford Creek at Castor Avenue in Philadelphia, sites where the dynamic flow and channel conditions make conventional measurement difficult. Every 5 minutes, a 60-second downward-looking video of the moving water surface can be processed to estimate the velocity of water in the stream.
A camera system to measure water level and surface velocity is being tested at the East Branch Brandywine Creek below Downingtown. This technology is part of the USGS Next Generation Water Observing System in the Delaware River Basin.
The image below shows about 52 million points collected in July 2020 using laser techniques which define the Frankford Creek channel in three dimensions. With this high resolution survey data, collection of video of moving particles in the water from a bridge camera can be used to estimate the streamflow rate every minute.
Below are publications associated with this project.