Images

Katherine J Knierim, Ph.D - Lower Mississippi-Gulf Water Science Center Hydrologist

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).

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 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.

Wintertime satellite imagery of Maryland farmland shows areas with higher amounts of green vegetation in deeper red colors. Bare fallow fields are distinguishable from cover crops and winter cereal crops, and evergreen forest is distinguishable from deciduous forest.

Kristin Hill stands tall in the foreground, her gaze fixed on the horizon. Her confident posture and determined expression speak volumes about her adventurous spirit. She's clearly prepared for the challenge ahead, outfitted in practical hiking gear: sturdy boots grip the rocky terrain, a backpack rests comfortably on her shoulders.

The animation in the figure shows aerial imagery from Anne Arundel County, Maryland, collected by National Agricultural Imagery Program (NAIP), followed by 1-meter Chesapeake Bay Land Cover (13 classes) and Land Use/Land Cover (54 classes) data products.

A group of words put together in vertical and horizontal positions to form a word cloud, that describe employment opportunities with the USGS. 

Compilation 12 of historical report covers from LA Water Science Center.

Compilation 2 of historical report covers from LA Water Science Center. These report citations and links can be found at https://www.usgs.gov/centers/lower-mississippi-gulf-water-science-cente….

Detailed description: Compilation 3 of historical report covers from LA Water Science Center. These report citations and links can be found at https://www.usgs.gov/centers/lower-mississippi-gulf-water-science-cente….

Compilation 4 of historical report covers from LA Water Science Center.

Compilation 8 of historical report covers from LA Water Science Center.

Cover crops planted early in the fall (right side of photo planted on October 5) can take advantage of warm soil and air temperatures, resulting in a greater amount of growth compared to cover crops planted later in the year as temperatures cool (left side of photo planted October 26, photo taken December 10).

Amanda Whaling is a hydrologist for the United States Geological Survey. In this photo, she is working on the French Broad River near Asheville, North Carolina. Amanda is dedicated to her work and takes pleasure in being out in nature, collecting data to help us better understand our environment.

In this NOAA satellite image from Sept. 15, 2020, Hurricane Sally approaches the U.S. Gulf Coast, Hurricane Paulettte creates storm waves far out in the Atlantic, and Tropical Storms Teddy and Vicky lie near the coast of Africa. Two tropical depressions are also developing; one of them is not visible in this image.

This is an alert map for Louisiana Bossier City. This is a screen shot but the live map can be found at https://wise.er.usgs.gov/dp/alertmaps/Bossier_map.html

Chart displaying nontidal monitoring network and upstream drainage from monitoring locations.

Sample graphic of data visualization of Chesapeake Data Dashboard

Sample visualization of pollution sources in Chesapeake Bay watershed.

Bussell, Ashley M working on site, with Blue USGS Shirt.