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landscape photograph showing construction vehicles and dark sand-like slopes along a body of brown water, forests, clouds

Sediment deposits at the discharge outlet of a hydropower facility on the Rio Coca, Ecuador.

Woman in a blue raincoat and a steeply eroded river valley with forests on top and grey exposed soil and rocks, cloudy sky

Molly Wood at a viewpoint on the Rio Coca, Ecuador, where substantial erosion and landslides have occurred

gangway on left leads to a standpipe down to brown stream with forested hills and the brown stream in the background

Sediment and flow monitoring station on the Rio Quijos, Rio Coca watershed, Ecuador

landscape showing river valley with bare steep hillsides and green forests on the hill tops

Rapid erosion of hillsides along the Rio Coca in Ecuador after collapse of a lava dam.

Landscape showing stream floodplain and erosion of streambanks, with cloudy sky and forested mountains

Streambank erosion on the Rio Coca after a waterfall collapse, Ecuador.

Mountainous landscape with green trees, cloudy sky, a river meandering and exposed soil and rock on steep cliffs

Regressive erosion on the Rio Coca upstream of the former San Rafael waterfall site, Ecuador

Reservoir and concrete dam structures and buildings with cloudy sky and forested hillsides

Upstream diversion dam at Coca Codo Sinclair hydropower facility on the Rio Coca, Ecuador

Rushing river, green vegetation and waterfalls in background

Iguazu Falls

Looking down into Iguazu Falls waterfalls from above. Flat horizon and white fluffy clouds on top half of photo.

Iguazu Falls from above

Boardwalk leading towards Iguazu Falls

Iguazu Falls boardwalk

Dam spillway surrounded by green trees on either side

Itaipu Binacional Dam spillway

View looking up at Itaipu Binacional hydroelectric dam and sign from below

Itaipu Binacional hydroelectric dam

Two scientists stand on and on shore near Itaipu Binational boat used for bathymetric surveys.

Itaipu Binacional boat used for bathymetric surveys

Twenty two people standing and smiling, a mix of USGS and Itaipu Binacional scientists

USGS and Itaipu Binacional staff from Paraguay and Brazil

Three people in hard hats and an orange reflective shirt stand on a rocky floor inside a dry dam

USGS employees inside Itaipu Binational Dam on Parana River bottom

Itaipu Binacional large letter sign in front of dam

Itaipu Binacional Dam sign in front of spillway

Person in hard hat looks through windows down into a dam control room.

Itaipu Binacional hydroelectric dam control room

Participants sitting at long table at UN Water Conference

UN Water Conference speakers

Discussion between participants at UN Water Conference

Discussion between participants at United Nations 2023 Water Conference

Eleven participants at the UN Water Conference smiling and standing behind desk and chairs

Speakers who presented at United Nations 2023 Water Conference

Large individual letter sign that states "#wateraction" with New York City skyline in background

#WATERACTION sign at the United Nations 2023 Water Conference