Jeff Opperman

Jeff Opperman

@jjopperman.bsky.social

Rivers, renewable revolution, and rock and roll. Global Lead Freshwater Scientist for WWF 🐟💧☀️🎸🎶 Writer for Forbes.com Energy and Sustainability sections Author, Floodplains Posts my own.

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Roosevelt recognized that H2O was one of key resources those forests provided, noting “A true forest is not merely a storehouse full of wood, but…at the same time a reservoir of water.”

In one of his State of the Union speeches, he observed the value of forests for reducing risk of both floods and water scarcity, concluding: “Forest conservation is therefore an essential condition of water conservation.”

#WaterYear 26 Luca & I near Horseshoe Bend of Colorado R. in 2009. More than 300 river miles downstream is Hoover Dam. On this day in 1936, its hydropower turbines first generated electricity. At 2 GW, it was the biggest hydropower dam in world until 1948; generation now dropping due to megadrought

#WaterYear 25 Wren and her boyfriend (visiting from Brooklyn) above an unnamed tributary to Silver Creek in West Woods Park in Geauga County (OH). We’ve had such a dry October that the waterfall isn’t flowing and the leaves cover the pool at its bottom.

#WaterYear 24 Happy International Freshwater Dolphin Day! (or World River Dolphin Day)! I took these photos of Irrawaddy Dolphins in the Mekong in 2013 on a trip down the river with my family. See my article in the New York Times about these extraordinary dolphins and that remarkable trip (next)

#WaterYear 23 Wren just arrived for a visit from her new home in Brooklyn. It’s a beautiful fall day here and I'm reminded of this photo from 19 years ago. Luca and Wren along the Chagrin River, October, 2007.

#WaterYear 22 Happy 75th birthday to The Nature Conservancy! I got my start in freshwater conservation with @nature.org. Here are my 2015 TNC Freshwater team colleagues in Utah above the Colorado River at sunset.

#WaterYear 21 365 seems like a good number for a year-long project, and so…English "Writer-gardener" John Evelyn was born 365 years ago on this day (in 1661). To fight pollution he encouraged tree planting & large city parks - actions still vitally important today...

#WaterYear 21 to sustainably reduce urban flood risk and to ensure people have access to green spaces for their physical and psychological health. Hudson River Park in Chelsea (Manhattan) in NYC. I met up with my son Luca there not too long after he’d moved to New York.

#WaterYear 19 Sunset on the Siphandone or Four Thousand Islands region of the Mekong River, a 50 km stretch where the river branches into hundreds of channels, a magical place of islands and waterfalls.

#WaterYear 18 The Clean Water Act passed 54 years ago. The Cuyahoga River helped inspire the Act thanks to the infamous time(s) it caught fire, but the river has recovered. 2 racing shells practicing at sunset on the Cuyahoga not far downstream of where the 1969 river fire happened. @neorsd.org

#WaterYear 17 A temple and bridge over the Irrawaddy River in Myanmar. The Irrawaddy is one of only two long rivers in south or southeast Asia that remain free flowing (the Salween is the other).

#WaterYear 16 On #WorldFoodDay let's remember that nearly 1/3 of all food in world comes from rivers: their water, nutrients, sediment or habitat. See WWF's fascinating microsite Rivers of Food (link in next post). Photo is a market in the Mekong Delta in Vietnam.

#WaterYear 15b. The photo above was cropped from this one, and shows people accessing sub-surface water by digging a scoop hole. The amount of labor people have to expend to get to that “invisible” water is immense and exhausting and precludes so many other activities.

#WaterYear 14 Last month TNC and many partners released the Amazon Forgotten Fishes report (link in following note) Photo: me at age of 24 hand line fishing for wolf fish in Bolivian Amazon; a trib to a trib of the Beni, which is trib to Madre Dios which is trib to the Amazon

#WaterYear 12 The Living Planet Report documents steep global average declines in vertebrate populations, w/ most dramatic decline among freshwater wildlife. But report’s subtitle is key: “the Science of Hope”. One reason for hope? Dam removal can restore fish populations Photo: juv salmon in Elwha

#WaterYear 11 Yesterday was World Mental Health Day. Research supports that time in nature improves mental health; "blue spaces" such as rivers & lakes are particularly effective. (Photo is of Paola floating in the Chagrin River at sunset)

#WaterYear 10a (video edition) here’s a song and music video I wrote celebrating migratory birds called “Flyways to Get Them Home” with my friend Matt Simon. #WMBD2026 #WorldMigratoryBirdDay

#WaterYear 10 Today is World Migratory Bird Day. Wetlands, lakes & rivers are crucial habitat for many migratory birds, like these African sacred ibises in the Tana River Delta, Kenya. #WBMD2026 #WorldMigratoryBirdDay

#WaterYear 9 The Living Planet Report shows monitored vertebrate populations have declined by 73% on average since 1970. Monitored freshwater populations have dropped by an average of 85%, largest decline of any species group. Photo is of a gharial swimming in the Babai River of Nepal.

Gharials are a crocodilian with a slender, toothy snout. Gharial numbers have declined by 95 - 98% and now there less than 1000 individuals in the wild.

Jeff Opperman reposted

🚨 New study 🚨 Decarbonization has a public health bonus. Three U.S. energy models: PM2.5 mortality rates down 28 to 73% by 2050 under net zero.

#WaterYear 8 Hope is the thing with feathers…(Emily Dickinson) Today, World Wildlife Fund released the Living Planet Report 2026: the Science of Hope. Photo: little Wren as a ruby-slippered water bird taking flight from the Chagrin River (sometime around 2008)

The global systems that drive nature loss can be transformed - and are already changing. Look at the recent rapid global progress in renewables: last year nearly 90% of all new electricity generation added to grids worlwide was renewable!

#WaterYear 7 Happy birthday to Yo-Yo Ma! (born this day in 1955) He has several beautiful recordings that celebrate rivers or water, including “The Falls” (an Ennio Morricone composition from “The Mission.”). Photo is Catarata San Fernando in Costa Rica. See next for water theme Yo-Yo Ma playlist

#WaterYear 6 Dinkey Creek, California. Photo was taken during late June of 2017 and Dinkey Creek was roaring like all the streams and rivers of the Sierra Nevada due to the record snowmelt runoff from an enormous snowpack melting rapidly during the heat of June.

#WaterYear 5 Today is #WorldHabitat Day celebrating the crucial importance of shelter & communities for people. Rivers greatly enhance life for people in cities, offering recreation & connection w/ nature even in crowded urban areas, such as the revitalized riverfront along the Rhône in Lyon France

#WaterYear 4 Today is #WorldAnimalDay, which is celebrated each year on October 4, the feast day of Francis of Assisi, patron saint of animals. On this World Animal Day i celebrate Birch, who we had to say goodbye to a few months ago after 15.5 wonderful years.

#WaterYear 2 Deschutes River; the Benham Falls reach north of Sun River, OR On this day in 1968, President Johnson signed into law the US Wild and Scenic Rivers Act. The Deschutes was designated Wild and Scenic in October of 1988.

#WaterYear 1 Happy New (Water) Year! Here in U.S., the new Water Year kicks off on Oct 1. To mark this moment, I’m starting a photo diary, each day posting one of my photos w/ a water theme along with a brief description of why that theme is important to people; see below for link to essay & song..