Daniel McCay and Chris Henry, U.S. Geological Survey hydrologic technicians, search a neighborhood south of Denham Springs, Louisiana, for high-water marks August 26. The term high-water mark refers to the debris flood waters will leave on walls, buildings and trees.
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Looking for High-Water Marks
Daniel McCay and Chris Henry, U.S. Geological Survey hydrologic technicians, search a neighborhood south of Denham Springs, Louisiana, for high-water marks August 26. The term high-water mark refers to the debris flood waters will leave on walls, buildings and trees.
Recording a High-Water Mark
Jonathan Gillip, USGS hydrologist, documents a high-water mark he flagged near a damage retirement community in Denham Springs, Louisiana, August 26. So far, USGS teams have flagged and surveyed more than 400 high-watermarks across southern Louisiana.
Jonathan Gillip, USGS hydrologist, documents a high-water mark he flagged near a damage retirement community in Denham Springs, Louisiana, August 26. So far, USGS teams have flagged and surveyed more than 400 high-watermarks across southern Louisiana.
Flooded Road in Louisiana
Flow along 4H Club Rd under I-12 on August 15, 2016.
Flow along 4H Club Rd under I-12 on August 15, 2016.
Flooding near Louisiana Water Science Center
The view on South Sherwood Forest Blvd near the USGS Louisiana Water Science Center office on August 15, 2016.
The view on South Sherwood Forest Blvd near the USGS Louisiana Water Science Center office on August 15, 2016.
Flooded House in Denham Springs
A flooded house near the confluence of the Comite and Amite Rivers near Denham Springs, LA.
A flooded house near the confluence of the Comite and Amite Rivers near Denham Springs, LA.
Flooded Neighborhood in Denham Springs
A flooded neighborhood near the confluence of the Comite and Amite Rivers near Denham Springs, LA.
A flooded neighborhood near the confluence of the Comite and Amite Rivers near Denham Springs, LA.
Flooded Street in Denham Springs
Backwater flooding across Florida Blvd near the Amite River Bridge in Denham Springs, LA.
Backwater flooding across Florida Blvd near the Amite River Bridge in Denham Springs, LA.
Lake sturgeon at the USGS Columbia Environmental Research Center
Lake sturgeon at the USGS Columbia Environmental Research CenterUSGS Biologist prepares to artificially spawn a female lake sturgeon in the laboratory at the Columbia Environmental Research Center.
Lake sturgeon at the USGS Columbia Environmental Research Center
Lake sturgeon at the USGS Columbia Environmental Research CenterUSGS Biologist prepares to artificially spawn a female lake sturgeon in the laboratory at the Columbia Environmental Research Center.
USGS Biologist prepares to release a reproductive female sturgeon.
USGS Biologist prepares to release a reproductive female sturgeon.USGS Biologist Sabrina Davenport prepares to release a reproductive female pallid sturgeon.
USGS Biologist prepares to release a reproductive female sturgeon.
USGS Biologist prepares to release a reproductive female sturgeon.USGS Biologist Sabrina Davenport prepares to release a reproductive female pallid sturgeon.
Newly hatched pallid sturgeon free embryos.
Pallid sturgeon free embryos on the day of hatch, approximately 8-9 mm (about 0.33 of an inch) in length.
Pallid sturgeon free embryos on the day of hatch, approximately 8-9 mm (about 0.33 of an inch) in length.
Pallid sturgeon free embryo at approximately 5 days post-hatch
Pallid sturgeon free embryo at approximately 5 days post-hatchFigure 3. Pallid sturgeon free embryo at approximately 5 days post-hatch, approximately 14-15 mm (about 0.57 of an inch) in length.
Pallid sturgeon free embryo at approximately 5 days post-hatch
Pallid sturgeon free embryo at approximately 5 days post-hatchFigure 3. Pallid sturgeon free embryo at approximately 5 days post-hatch, approximately 14-15 mm (about 0.57 of an inch) in length.
Pallid sturgeon free embryo at approximately 10 days post-hatch
Pallid sturgeon free embryo at approximately 10 days post-hatchPallid sturgeon free embryo at approximately 10 days post-hatch, approximately 19-20 mm (about 0.77 of an inch) in length.
Pallid sturgeon free embryo at approximately 10 days post-hatch
Pallid sturgeon free embryo at approximately 10 days post-hatchPallid sturgeon free embryo at approximately 10 days post-hatch, approximately 19-20 mm (about 0.77 of an inch) in length.
Pallid sturgeon free embryo at approximately 2 days post-hatch
Pallid sturgeon free embryo at approximately 2 days post-hatchPallid sturgeon free embryo at approximately 2 days post-hatch, approximately 11-12 mm (about 0.45 of an inch) in length.
Pallid sturgeon free embryo at approximately 2 days post-hatch
Pallid sturgeon free embryo at approximately 2 days post-hatchPallid sturgeon free embryo at approximately 2 days post-hatch, approximately 11-12 mm (about 0.45 of an inch) in length.
Oaxaca Cave Sleeper is a newly discovered species
This Oaxaca Cave Sleeper is one of thirteen specimens collected from a cave beneath a reservoir on Mexico's Tonto River. It lacks eyes, is unpigmented, and has sensory adaptations characteristic of fish that live in total darkness. Thuis is the holotype, the example used to describe and name this newly identified species. Credit: Howard L.
This Oaxaca Cave Sleeper is one of thirteen specimens collected from a cave beneath a reservoir on Mexico's Tonto River. It lacks eyes, is unpigmented, and has sensory adaptations characteristic of fish that live in total darkness. Thuis is the holotype, the example used to describe and name this newly identified species. Credit: Howard L.
A laboratory specimen shows the cavefish's absence of eyes
A laboratory specimen shows the cavefish's absence of eyesA laboratory preparation of a Oaxaca Cave Sleeper specimen shows the absence of eyes in this newly identified cavefish species. Credit: Stephen J. Walsh, USGS
A laboratory specimen shows the cavefish's absence of eyes
A laboratory specimen shows the cavefish's absence of eyesA laboratory preparation of a Oaxaca Cave Sleeper specimen shows the absence of eyes in this newly identified cavefish species. Credit: Stephen J. Walsh, USGS
Pallid Sturgeon Embryo
Developing pallid sturgeon embryo.
Developing pallid sturgeon embryo.
Pallid Sturgeon Embryo
Macro photo of a developing pallid sturgeon embryo. Developing embryo appears light gray
Macro photo of a developing pallid sturgeon embryo. Developing embryo appears light gray
Farm in northeast Iowa
A corn farm in northeast Iowa. A new USGS report shows that drought periods followed by rainfall caused nitrate levels to increase to the highest ever measured in some Midwest streams during a 2013 study.
A corn farm in northeast Iowa. A new USGS report shows that drought periods followed by rainfall caused nitrate levels to increase to the highest ever measured in some Midwest streams during a 2013 study.
Stan Musial bridge in St. Louis, Missouri
Photo of the Stan Musial bridge in St. Louis, Missouri.
Photo of the Stan Musial bridge in St. Louis, Missouri.
DEM in the Atchafalaya Basin, LA
Digital Elevation Model in the Atchafalaya Basin, LA
Digital Elevation Model in the Atchafalaya Basin, LA
View of Old Mans Creek near Iowa City, Iowa
View of Old Mans Creek near Iowa City, Iowa upstream from a bridge used for collecting water-quality samples (USGS Site ID: 05455100).
View of Old Mans Creek near Iowa City, Iowa upstream from a bridge used for collecting water-quality samples (USGS Site ID: 05455100).