John Garver
@geogarver.bsky.social
Prof. of Geology, Cordilleran tectonics, rivers, hydrology, ice jams, water quality, invasive species, natural disasters, geochronology. Mohawk and Hudson watersheds. Board of Riverkeeper. Alaska, PNW, Maine, NY. "Notes from a Watershed" @ substack
A brilliant day on the Mohawk River today at Cohoes Falls in NY. #MohawkRiver
October 16, 2025 at 10:50 PM
A brilliant day on the Mohawk River today at Cohoes Falls in NY. #MohawkRiver
"this evidence suggests that PFAS could influence human brain development even at low concentrations in the general population, which is particularly concerning given their ubiquitous presence in pregnancies globally." #PFAS
www.sciencedirect.com/science/arti...
www.sciencedirect.com/science/arti...
October 16, 2025 at 10:37 AM
"this evidence suggests that PFAS could influence human brain development even at low concentrations in the general population, which is particularly concerning given their ubiquitous presence in pregnancies globally." #PFAS
www.sciencedirect.com/science/arti...
www.sciencedirect.com/science/arti...
The "Seneca Chief" arrived in Schenectady today to commemorate the 200th anniversary of Clinton's 1825 historic journey across NY State on the Erie Canal in 1825. Here Assemblyman Santabarbara and Mayor McCarthy pour Schenectady water into the cask that will be carried to NYC. #eriecanal
October 14, 2025 at 10:15 PM
The "Seneca Chief" arrived in Schenectady today to commemorate the 200th anniversary of Clinton's 1825 historic journey across NY State on the Erie Canal in 1825. Here Assemblyman Santabarbara and Mayor McCarthy pour Schenectady water into the cask that will be carried to NYC. #eriecanal
The best I can do: "Buffalo Sal" here in front. This is the dedicated wooden push boat for the "Seneca Chief"
October 14, 2025 at 12:30 PM
The best I can do: "Buffalo Sal" here in front. This is the dedicated wooden push boat for the "Seneca Chief"
The "Seneca Chief" is in the lower Mohawk watershed (NY). This 73' boat is amazing inside, and a remarkable achievement for those at the #BuffaloMaritimeMuseum . They carry important messages about our history, indigenous displacement, and invasive species in the #ErieCanal
Here in Amsterdam NY.
Here in Amsterdam NY.
October 14, 2025 at 12:05 PM
The "Seneca Chief" is in the lower Mohawk watershed (NY). This 73' boat is amazing inside, and a remarkable achievement for those at the #BuffaloMaritimeMuseum . They carry important messages about our history, indigenous displacement, and invasive species in the #ErieCanal
Here in Amsterdam NY.
Here in Amsterdam NY.
Colorado River Indian Tribes may grant personhood rights to 'living' river. "...we see it from a different perspective," she said. "Who uses the water and how much it's about protecting this river."
www.azcentral.com/story/news/l...
www.azcentral.com/story/news/l...
October 10, 2025 at 10:56 AM
Colorado River Indian Tribes may grant personhood rights to 'living' river. "...we see it from a different perspective," she said. "Who uses the water and how much it's about protecting this river."
www.azcentral.com/story/news/l...
www.azcentral.com/story/news/l...
In September 2025 the Hudson River has experienced the largest Harmful Algal Bloom (HAB) ever recorded. Riverkeeper has been monitoring this event, and this recorded webinar explains what has happened. #HudsonRiver #Riverkeeper
www.youtube.com/watch?v=5BtT...
www.youtube.com/watch?v=5BtT...
September 27, 2025 at 2:18 PM
In September 2025 the Hudson River has experienced the largest Harmful Algal Bloom (HAB) ever recorded. Riverkeeper has been monitoring this event, and this recorded webinar explains what has happened. #HudsonRiver #Riverkeeper
www.youtube.com/watch?v=5BtT...
www.youtube.com/watch?v=5BtT...
Impressive rainfall totals for the last two days in the Capital District of NY. Locally this rain - totals of 3-5" - made up for the entire month of September, which has been exceptionally dry.
www.weather.gov/aly/
www.weather.gov/aly/
September 26, 2025 at 7:42 PM
Impressive rainfall totals for the last two days in the Capital District of NY. Locally this rain - totals of 3-5" - made up for the entire month of September, which has been exceptionally dry.
www.weather.gov/aly/
www.weather.gov/aly/
If you are interested in PFAS in surface waters, "The Cost of Forever" documentary by Charles Connell is really interesting. The Coosa Riverkeepers are measuring levels of PFAS contamination in rivers and drinking water using Cyclopure kits. #PFAS
www.southernexposurefilms.org/films/the-co...
www.southernexposurefilms.org/films/the-co...
September 25, 2025 at 10:15 PM
If you are interested in PFAS in surface waters, "The Cost of Forever" documentary by Charles Connell is really interesting. The Coosa Riverkeepers are measuring levels of PFAS contamination in rivers and drinking water using Cyclopure kits. #PFAS
www.southernexposurefilms.org/films/the-co...
www.southernexposurefilms.org/films/the-co...
September 19, 2025 at 7:53 PM
The Mendenhall River in Alaska has reached major flood stage as water drains from the Suicide basin in a glacial outburst flood. The latest levels from the National Water Prediction Service.
water.noaa.gov/gauges/MNDA2
water.noaa.gov/gauges/MNDA2
August 13, 2025 at 10:55 AM
The Mendenhall River in Alaska has reached major flood stage as water drains from the Suicide basin in a glacial outburst flood. The latest levels from the National Water Prediction Service.
water.noaa.gov/gauges/MNDA2
water.noaa.gov/gauges/MNDA2
Air Quality and wildfire smoke map at Air Now from US EPA and partners.
fire.airnow.gov#5.45/43.561/...
fire.airnow.gov#5.45/43.561/...
August 4, 2025 at 10:37 AM
Air Quality and wildfire smoke map at Air Now from US EPA and partners.
fire.airnow.gov#5.45/43.561/...
fire.airnow.gov#5.45/43.561/...
July 20, 2025 at 9:30 AM
Interactive map of wildfires in Canada at CBC. "Early signs point to another active wildfire season in 2025, particularly in Western Canada."
www.cbc.ca/newsinteract...
www.cbc.ca/newsinteract...
June 4, 2025 at 9:36 PM
Interactive map of wildfires in Canada at CBC. "Early signs point to another active wildfire season in 2025, particularly in Western Canada."
www.cbc.ca/newsinteract...
www.cbc.ca/newsinteract...
The third annual meeting of the NYS Center of Excellence in Healthy Water Solutions is this week. Livestreaming options on PFAS, water quality, septic, monitoring, and more.
healthywaters.org/annual-meeti...
healthywaters.org/annual-meeti...
May 20, 2025 at 5:42 PM
The third annual meeting of the NYS Center of Excellence in Healthy Water Solutions is this week. Livestreaming options on PFAS, water quality, septic, monitoring, and more.
healthywaters.org/annual-meeti...
healthywaters.org/annual-meeti...
That's odd... it seems like a kestrel shouldn't be uncommon in Burt NY in mid May. Here are eBird sightings for May/June
May 20, 2025 at 9:43 AM
That's odd... it seems like a kestrel shouldn't be uncommon in Burt NY in mid May. Here are eBird sightings for May/June
It turns out that it was the second week of August.
May 9, 2025 at 7:31 PM
It turns out that it was the second week of August.
Support efforts to restore the American Eel in the Hudson watershed. The ASMFC recognizes that the American eel population is “depleted,” and the NYS DEC designated them as “species of special concern.” in the Mohawk River, they are gone. #eel
engage.riverkeeper.org/defend-eels-...
engage.riverkeeper.org/defend-eels-...
April 25, 2025 at 7:48 PM
Support efforts to restore the American Eel in the Hudson watershed. The ASMFC recognizes that the American eel population is “depleted,” and the NYS DEC designated them as “species of special concern.” in the Mohawk River, they are gone. #eel
engage.riverkeeper.org/defend-eels-...
engage.riverkeeper.org/defend-eels-...
Road salt pollution in Upstate NY has affected municipal drinking water and aquatic ecosystems. At low flow in the Mohawk River, chloride increases 40% from base flow. Chloride levels in the Scotia well field have risen by nearly 800% since 1970. #salinization
www.researchgate.net/publication/...
www.researchgate.net/publication/...
April 1, 2025 at 11:40 AM
Road salt pollution in Upstate NY has affected municipal drinking water and aquatic ecosystems. At low flow in the Mohawk River, chloride increases 40% from base flow. Chloride levels in the Scotia well field have risen by nearly 800% since 1970. #salinization
www.researchgate.net/publication/...
www.researchgate.net/publication/...
Great to see this lone snow bunting yesterday.
February 12, 2025 at 12:13 PM
Great to see this lone snow bunting yesterday.
Topographic differencing using Lidar to understand impacts of the 2025 Palisades and Eaton fires. #Altadena @opentopography.org
opentopography.org/blog/using-l...
opentopography.org/blog/using-l...
February 11, 2025 at 5:29 PM
Topographic differencing using Lidar to understand impacts of the 2025 Palisades and Eaton fires. #Altadena @opentopography.org
opentopography.org/blog/using-l...
opentopography.org/blog/using-l...
