Dr. Rigby leads the Hydrologic Transport and Response Branch overseeing scientific investigations in water quality, aquatic biology, hydrologic alteration, and the hydrology of coastal systems.
Multimedia
Multimedia
The Lower Mississippi-Gulf multimedia gallery is a collection of images and videos that help vizualize our mission. We strive to provide first-class science and data to the public and our cooperators.
Images
JR Rigby Staff Profile Picture
Dr. Rigby leads the Hydrologic Transport and Response Branch overseeing scientific investigations in water quality, aquatic biology, hydrologic alteration, and the hydrology of coastal systems.
Aftermath of severe flooding on Pigeon River in Newport, Tennessee
USGS Hydrologic Technician Pamela Loftin looks on at the aftermath of severe flooding on Pigeon River in Newport, Tennessee. USGS crews were onsite October 1 to measure high-water marks to determine how high the flood waters reached at this location. Photo by Logan Combs, USGS.
USGS Hydrologic Technician Pamela Loftin looks on at the aftermath of severe flooding on Pigeon River in Newport, Tennessee. USGS crews were onsite October 1 to measure high-water marks to determine how high the flood waters reached at this location. Photo by Logan Combs, USGS.
Kathy_Knierim_2.jpg
Katherine J Knierim, Ph.D - Lower Mississippi-Gulf Water Science Center Hydrologist
Katherine J Knierim, Ph.D - Lower Mississippi-Gulf Water Science Center Hydrologist
WINTER COVER CROPS - delayed termination
Similarly, growing the cover crop later into the spring (delayed termination) can result in greatly increased biomass due to warmer growing conditions, with corresponding increases in nutrient uptake, root development, and soil health benefits (same field pictured on March 15, left, and May 2, right).
Similarly, growing the cover crop later into the spring (delayed termination) can result in greatly increased biomass due to warmer growing conditions, with corresponding increases in nutrient uptake, root development, and soil health benefits (same field pictured on March 15, left, and May 2, right).
Keeping-Green-Hiveley (1).PNG
On-farm sampling of cover crop performance, conducts using quadrats and camera equipment, is used to calibrate remote sensing vegetation indices to calculate cover crop biomass and vegetative cover from satellite.
On-farm sampling of cover crop performance, conducts using quadrats and camera equipment, is used to calibrate remote sensing vegetation indices to calculate cover crop biomass and vegetative cover from satellite.
WINTER COVER CROPS - On-farm performance
On-farm performance of winter cover crops is variable, ranging from minimal biomass due to poor agronomy and weather conditions; low biomass due to limited soil nutrients and late planting dates; medium biomass under typical growing conditions; and high biomass due to good agronomy, favorable weather, and abundant availability of soil nutrients.
On-farm performance of winter cover crops is variable, ranging from minimal biomass due to poor agronomy and weather conditions; low biomass due to limited soil nutrients and late planting dates; medium biomass under typical growing conditions; and high biomass due to good agronomy, favorable weather, and abundant availability of soil nutrients.
Videos
USGS Journeys – RESTORED: A Hydrologist’s Story
With science centers in 13 states and two territories, the Southeast Region of the United States Geological Survey is comprised of individuals from all across the country who aid in serving the public with invaluable data about the country’s most critical ecological processes.
With science centers in 13 states and two territories, the Southeast Region of the United States Geological Survey is comprised of individuals from all across the country who aid in serving the public with invaluable data about the country’s most critical ecological processes.
Monitoring Suspended Sediment and Flow along the Mississippi River: Episode 2
In this video segment, the U.S. Geological Survey (USGS), Lower Mississippi Gulf Water Science Center (LMGWSC) scientists give a detailed description of how the USGS uses Acoustic Doppler Current Profilers, (ADCP) to measure flow along the lower Mississippi River.
In this video segment, the U.S. Geological Survey (USGS), Lower Mississippi Gulf Water Science Center (LMGWSC) scientists give a detailed description of how the USGS uses Acoustic Doppler Current Profilers, (ADCP) to measure flow along the lower Mississippi River.
Monitoring Suspended Sediment and Flow along the Mississippi River: Episode 3B
(Episode 3, Part B) In this video segment, the U.S. Geological Survey (USGS), Lower Mississippi Gulf Water Science Center (LMGWSC) scientists give a detailed description of how the USGS deploys heavy samplers to collect discrete water samples for suspended sediment, and bed material on large rivers like the Mississippi River.
(Episode 3, Part B) In this video segment, the U.S. Geological Survey (USGS), Lower Mississippi Gulf Water Science Center (LMGWSC) scientists give a detailed description of how the USGS deploys heavy samplers to collect discrete water samples for suspended sediment, and bed material on large rivers like the Mississippi River.
Monitoring Suspended Sediment and Flow along the Mississippi River: Bonus Episode
In this video segment, the U.S. Geological Survey (USGS), Lower Mississippi Gulf Water Science Center (LMGWSC) scientists give a preview of how the USGS is currently working to design a new generation large river sampler. This new sampler will incorporate all functions of previously developed USGS depth and point samplers.
In this video segment, the U.S. Geological Survey (USGS), Lower Mississippi Gulf Water Science Center (LMGWSC) scientists give a preview of how the USGS is currently working to design a new generation large river sampler. This new sampler will incorporate all functions of previously developed USGS depth and point samplers.
Monitoring Suspended Sediment and Flow along the Mississippi River: Episode 3A
In this video segment (Episode 3, Part A), the U.S. Geological Survey (USGS), Lower Mississippi Gulf Water Science Center (LMGWSC) scientists give a detailed description of how the USGS deploys heavy samplers to collect discrete water samples for suspended sediment, and bed material on large rivers like the Mississippi River.
In this video segment (Episode 3, Part A), the U.S. Geological Survey (USGS), Lower Mississippi Gulf Water Science Center (LMGWSC) scientists give a detailed description of how the USGS deploys heavy samplers to collect discrete water samples for suspended sediment, and bed material on large rivers like the Mississippi River.
Groundwater use from the Ozark Plateaus aquifer system, 1900 to 2010
Groundwater use from the Ozark Plateaus aquifer system, 1900 to 2010” is a short video showing modeled groundwater withdrawal rates from the Ozark Plateaus aquifer system (Ozark system) in the central United States.
Groundwater use from the Ozark Plateaus aquifer system, 1900 to 2010” is a short video showing modeled groundwater withdrawal rates from the Ozark Plateaus aquifer system (Ozark system) in the central United States.