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Photo of helicopter with large loop deployed below it via slingload
Airborne electromagnetic survey, northeastern Wisconsin, January 2021
Airborne electromagnetic survey, northeastern Wisconsin, January 2021
Airborne electromagnetic survey, northeastern Wisconsin, January 2021

Photo of helicopter with geophysical equipment loop deployed below it via slingload. In January 2021 a helicopter carried an airborne electromagnetic induction sensor over parts of northeastern Wisconsin as part of a USGS study to map the aquifers in the region.

Photo of helicopter with geophysical equipment loop deployed below it via slingload. In January 2021 a helicopter carried an airborne electromagnetic induction sensor over parts of northeastern Wisconsin as part of a USGS study to map the aquifers in the region.

Photo of helicopter with large loop deployed below it via slingload. Ground is covered with snow, and a person in high-vis gear.
Airborne electromagnetic survey, northeastern Wisconsin, January 2021
Airborne electromagnetic survey, northeastern Wisconsin, January 2021
Airborne electromagnetic survey, northeastern Wisconsin, January 2021

Photo of helicopter with geophysical equipment loop deployed below it via slingload. In January 2021 a helicopter carried an airborne electromagnetic induction sensor over parts of northeastern Wisconsin as part of a USGS study to map the aquifers in the region.

Photo of helicopter with geophysical equipment loop deployed below it via slingload. In January 2021 a helicopter carried an airborne electromagnetic induction sensor over parts of northeastern Wisconsin as part of a USGS study to map the aquifers in the region.

United States map showing outlines of state boundaries. Symbols indicate locations of over 2,500 network wells where current con
January 4, 2021, Below Normal Groundwater Levels Network
January 4, 2021, Below Normal Groundwater Levels Network
January 4, 2021, Below Normal Groundwater Levels Network

Map indicates groundwater sites within the USGS Active Groundwater Level network where the most recent groundwater-level measurement is in the 24th percentile or lower in the month of measurement over the period of record for the well.

Map indicates groundwater sites within the USGS Active Groundwater Level network where the most recent groundwater-level measurement is in the 24th percentile or lower in the month of measurement over the period of record for the well.

Photo of the Rivanna river. The water is so turbid it looks completely orange.
Freshwater Flow into Chesapeake Bay
Freshwater Flow into Chesapeake Bay
Freshwater Flow into Chesapeake Bay

High levels of nutrients and sediment can degrade the health of rivers and downstream bodies of water. In this photo of the Rivanna River in Virginia, large amounts of sediment are suspended in the river's water. The Rivanna River flows into the Chesapeake Bay, and too much sediment and/or nutrients can endanger the health of the Bay.

High levels of nutrients and sediment can degrade the health of rivers and downstream bodies of water. In this photo of the Rivanna River in Virginia, large amounts of sediment are suspended in the river's water. The Rivanna River flows into the Chesapeake Bay, and too much sediment and/or nutrients can endanger the health of the Bay.

Hydrologic Technician Matt Bach measures discharge in Ashwaubenon Creek near Little Rapids, WI
Hydrologic Technician measures discharge in Ashwaubenon Creek, WI (2)
Hydrologic Technician measures discharge in Ashwaubenon Creek, WI (2)
Hydrologic Technician measures discharge in Ashwaubenon Creek, WI (2)

Hydrologic Technician Matt Bach measures discharge in Ashwaubenon Creek near Little Rapids, WI (NWIS site: 04085068) on May 21, 2020, as part of a cooperative project with NEWWater (Green Bay Metropolitan Sewage District) utilizing an adaptive management approach to meet phosp

Hydrologic Technician Matt Bach measures discharge in Ashwaubenon Creek near Little Rapids, WI (NWIS site: 04085068) on May 21, 2020, as part of a cooperative project with NEWWater (Green Bay Metropolitan Sewage District) utilizing an adaptive management approach to meet phosp

Katy O’Donnell monitors readings from different instruments of the flow system during a high-resolution water quality survey
Katy O’Donnell monitors readings from water quality instrument
Katy O’Donnell monitors readings from water quality instrument
Katy O’Donnell monitors readings from water quality instrument

Katy O’Donnell monitors readings from different instruments of the flow-through system during a high-resolution water quality mapping survey onboard the RV Landsteiner along the Sacramento River in West Sacramento, CA.

Katy O’Donnell monitors readings from different instruments of the flow-through system during a high-resolution water quality mapping survey onboard the RV Landsteiner along the Sacramento River in West Sacramento, CA.

Libby Dam on the Kootenai River near Libby, Montana.
Libby Dam, Lake Koocanusa
Libby Dam, Lake Koocanusa
Libby Dam, Lake Koocanusa

Photograph looking northwest towards Libby Dam and Lake Koocanusa on the Kootenai River near Libby, Montana.

Photograph looking northwest towards Libby Dam and Lake Koocanusa on the Kootenai River near Libby, Montana.

Dave Brower (left) and Taylor Nagleri (right) working on logging data that was being collected by Rob Lorens in the stream
Dave Brower (left) and Taylor Nagleri (right) working on logging data
Dave Brower (left) and Taylor Nagleri (right) working on logging data
Dave Brower (left) and Taylor Nagleri (right) working on logging data

Dave Brower (left) and Taylor Nagleri (right) working on logging data that was being collected by Rob Lorens in the stream (not pictured).

Katy O’Donnell onboard the RV Landsteiner during a high-resolution water quality mapping survey.
Katy O’Donnell onboard the RV Landsteiner during a survey
Katy O’Donnell onboard the RV Landsteiner during a survey
Katy O’Donnell onboard the RV Landsteiner during a survey

Katy O’Donnell onboard the RV Landsteiner during a high-resolution water quality mapping survey. The boat is equipped with a flow-through system that pumps water onto the boat while underway and directs sample water to a multiparameter water quality sonde, thermosalinograph, fluorometers, nitrate and ammonium analyzers.

Katy O’Donnell onboard the RV Landsteiner during a high-resolution water quality mapping survey. The boat is equipped with a flow-through system that pumps water onto the boat while underway and directs sample water to a multiparameter water quality sonde, thermosalinograph, fluorometers, nitrate and ammonium analyzers.

Brian Bergamaschi and Katy O’Donnell onboard the RV Landsteiner
Brian Bergamaschi and Katy O’Donnell onboard the RV Landsteiner
Brian Bergamaschi and Katy O’Donnell onboard the RV Landsteiner
Brian Bergamaschi and Katy O’Donnell onboard the RV Landsteiner

Brian Bergamaschi and Katy O’Donnell onboard the RV Landsteiner during a high-resolution water quality mapping survey. The boat is equipped with a flow-through system that pumps water onto the boat while underway and directs sample water to a multiparameter water quality sonde, thermosalinograph, fluorometers, nitrate and ammonium analyzers.

Brian Bergamaschi and Katy O’Donnell onboard the RV Landsteiner during a high-resolution water quality mapping survey. The boat is equipped with a flow-through system that pumps water onto the boat while underway and directs sample water to a multiparameter water quality sonde, thermosalinograph, fluorometers, nitrate and ammonium analyzers.

LoRa cellular gateway
Solar-powered LoRa cellular gateway
Solar-powered LoRa cellular gateway
Solar-powered LoRa cellular gateway

Solar-powered LoRa cellular gateway installed at Pepperwood Preserve to support water and soil moisture sensor deployments in the Santa Rosa, California area

Solar-powered LoRa cellular gateway installed at Pepperwood Preserve to support water and soil moisture sensor deployments in the Santa Rosa, California area

Image showing a conceptual model of the Truxton Basin and Hualapai Plateau groundwater-flow system in northwestern Arizona
Image showing a conceptual model of the Truxton Basin and Hualapai Plateau groundwater-flow system in northwestern Arizona
Image showing a conceptual model of the Truxton Basin and Hualapai Plateau groundwater-flow system in northwestern Arizona
Image showing a conceptual model of the Truxton Basin and Hualapai Plateau groundwater-flow system in northwestern Arizona

This report includes five chapters. Chapter A (Mason, Knight, and others, 2020) is a summary of this multichapter volume and briefly describes the study area. Chapter B (Mason, Bills, and Macy, 2020) describes the geology and hydrology of the Truxton basin and Hualapai Plateau.

Animation of Groundwater Watch Active Water Level Network national US map
December 2020 USGS Active Groundwater Level Network Animation
December 2020 USGS Active Groundwater Level Network Animation
December 2020 USGS Active Groundwater Level Network Animation

The USGS Active Groundwater Level Network includes about 20,000 wells that have been measured by the USGS or USGS cooperators at least once within the past 13 months. The animation shows a daily snapshot of water-level statistics in the network for December 2020.

The USGS Active Groundwater Level Network includes about 20,000 wells that have been measured by the USGS or USGS cooperators at least once within the past 13 months. The animation shows a daily snapshot of water-level statistics in the network for December 2020.

Brian Bergamaschi and Katy O’Donnell onboard the RV Landsteiner during a high-resolution water quality mapping survey.
Brian Bergamaschi and Katy O’Donnell onboard the RV Landsteiner
Brian Bergamaschi and Katy O’Donnell onboard the RV Landsteiner
Brian Bergamaschi and Katy O’Donnell onboard the RV Landsteiner

Brian Bergamaschi and Katy O’Donnell onboard the RV Landsteiner during a high-resolution water quality mapping survey. The boat is equipped with a flow-through system that pumps water onto the boat while underway and directs sample water to a multiparameter water quality sonde, thermosalinograph, fluorometers, nitrate and ammonium analyzers.

Brian Bergamaschi and Katy O’Donnell onboard the RV Landsteiner during a high-resolution water quality mapping survey. The boat is equipped with a flow-through system that pumps water onto the boat while underway and directs sample water to a multiparameter water quality sonde, thermosalinograph, fluorometers, nitrate and ammonium analyzers.

Hydrologist downloading water-level sensor deployed for summer as part of an ecohydro study
Hydrologist downloading water-level sensor deployed for summer
Hydrologist downloading water-level sensor deployed for summer
Hydrologist downloading water-level sensor deployed for summer

Hydrologist downloading water-level sensor deployed for summer as part of an ecohydro study in *H.J. Andrews Experimental Forest. *USGS Integrated Ecohydrological Science - USFS & Oregon State University *Patrick Haluska

Hydrologist downloading water-level sensor deployed for summer as part of an ecohydro study in *H.J. Andrews Experimental Forest. *USGS Integrated Ecohydrological Science - USFS & Oregon State University *Patrick Haluska

EnviSense active deployment
EnviSense with stage sensor at USGS streamgage at Beale Air Force Base near Marysville CA
EnviSense with stage sensor at USGS streamgage at Beale Air Force Base near Marysville CA
EnviSense with stage sensor at USGS streamgage at Beale Air Force Base near Marysville CA

EnviSense data-logger/transmitter developed by Carnegie Mellon University actively deployed with stage sensor at USGS streamgage at Beale Air Force Base near Marysville, California.     

Jeniffer Soto Perez (left) and Emily Richardson (Right) prepare water quality sample bottles onboard the RV Landsteiner
Jeniffer Soto Perez(left) and Emily Richardson (Right) prepare samples
Jeniffer Soto Perez(left) and Emily Richardson (Right) prepare samples
Jeniffer Soto Perez(left) and Emily Richardson (Right) prepare samples

Jeniffer Soto Perez (left) and Emily Richardson (Right) prepare water quality sample bottles onboard the RV Landsteiner during a high-resolution water quality mapping survey.

Jeniffer Soto Perez (left) and Emily Richardson (Right) prepare water quality sample bottles onboard the RV Landsteiner during a high-resolution water quality mapping survey.

Devin McGinty collecting measurements in the field

Devin McGinty collecting measurements in the field including surveying and installing a new staff gage. 

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