Images

Aerial view of the Boreholes drilled in the ice to measure the flow at the USGS site 01438500 Delaware River at Montague, New Jersey 

Aerial view looking downstream at USGS site 01438500 Delaware River at Montague, New Jersey and seeing the bridge over the frozen river with a red highlighted line indicating the intended cross section for the ice measurement.

USGS Scientists Jon Suchy, Pat Bowen, and Jason Shvanda Standing on the frozen Delaware River at the USGS 01438500 Delaware River at Montague, New Jersey site with their ice measurement equipment as they prepare to make their measurement

USGS scientists Patrick Bowen and Jon Suchy collecting flow data through a borehole in the ice at USGS 01438500 Delaware River at Montague, New Jersey

USGS Scientist Karl Braun lowers an Acoustic Probe below the ice to collect the flow data for the USGS 01438500 Delaware River at Montague, New Jersey site

Looking at the USGS 01483500 Delaware River at Montague, New Jersey through an Infra-red camera which shows the differences in the ice as shades of color. The red circles along the bottom are the boreholes where the warmer water below is exposed to the surface.

USGS Scientist Jon Suchy collects and records data on a laptop while scientist Pat Bowen measures the thickness of the ice during their measurement of the flow under the ice at USGS 01438500 Delaware River at Montague, New Jersey

USGS scientists Jon Suchy and Pat Bowen take a moment to greet the drone watching them as they make a measurement of the flow under the ice at USGS 01438500 Delaware River at Montague, New Jersey

Looking at the Acoustic Dopler Current Profiler (ADCP) being used to measure the flow below the ice next to a traditional wading rod inn front of the borehole in in the ice at USGS 01438500 Delaware River at Montague, New Jersey

Looking downstream along the frozen river at the Montague bridge and the USGS 01438500 Delaware River at Montague, New Jersey site

Two USGS Scientists standing on the frozen Delaware River preparing to make an ice measurement at the USGS 01438500 Delaware River at Montague, New Jersey site.

USGS Scientists Patric Bowen and Jon Suchy drill a Borehole in the ice on the Delaware river at USGS 01438500 Delaware River at Montague, New Jersey

USGS Scientists Jon Suchy and Pat Bowen working off of an ice sled, lower an acoustic sensor below the ice, through the hole they drilled to obtain flow information for the USGS 01438500 Delaware River at Montague, New Jersey site

Looking out over the frozen Delaware River at the Montague Gage house on the right and the bridge in the distance downstream at the USGS 01438500 Delaware River at Montague site before the ice measurement is made

New Jersey Unmanned Aerial Systems (UAS) Team along with two observers bringing their drone back to shore after filming the USGS scientists out on the river making a measurement of flow below the ice at USGS 01438500 Delaware River at Montague, New Jersey

USGS Scientists Jon Suchy and Pat Bowen working off of an ice sled to lower an acoustic sensor below the ice, through the hole they drilled, so they can obtain flow information at USGS 01438500 Delaware River at Montague, New Jersey

Graph depicting the buildup of stage as Ice forms on the river s control and the continued effect it has on the rivers stage

Graph of calculated river discharge being blocked out due to the effects of ice on the rivers gage height

Hydrograph of the USGS 01379845 Rockaway River at Warren St at Dover with camera images showing how the Ice changs the stage at the site 

Three images of the USGS 01388500 Pompton River at Pompton Plains, NJ station showing Ice formation over time

Stage radar at USGS 01387905 Ramapo River at West Oakland Ave at Oakland, NJ looking down on a frozen river surface.