Images

Iguazu Falls on the border of Brazil and Argentina. A rushing river in the foreground is bordered by green vegetation, with waterfalls in background.

Iguazu Falls view from above, on the border of Brazil and Argentina. Green vegetation surrounds the waterfalls.

Boardwalk leading towards Iguazu Falls viewpoint. Iguazu Falls on the border of Brazil and Argentina. A river in the foreground is bordered by green vegetation, with waterfalls in background.

(L to R) USGS's Brian McCallum, Joel Groten, and Molly Wood inside Itaipu Binational dam and standing on the original Paraná River bottom on the border of Brazil and Paraguay.

Itaipu Binacional Dam spillway. The binational dam is located on the Parana River on the border of Brazil and Paraguay.

View looking up at Itaipu Binacional hydroelectric dam and sign from below. The binational dam is located on the border of Brazil and Paraguay.

U.S. Geological Survey and Itaipu Binacional staff outside of a Itaipu Binational water quality laboratory. (L to R) USGS's Brian McCallum, Molly Wood, three Itaipu Binacional staff, and USGS's Joel Groten. The binational dam and water quality laboratory is located on the Parana River on the border of Brazil and Paraguay.

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

A mix of twenty two USGS and Itaipu Binacional staff from Paraguay and Brazil at a meeting.

Itaipu Binacional Dam sign in front of spillway. The binational dam is located on the Parana River between Brazil and Paraguay.

Person in hard hat looks through windows down into the Itaipu Binacional hydroelectric dam control room. The binational dam is located on the border of Brazil and Paraguay on the Parana River.

 Joel Groten at the United Nations General Assembly during the UN2023 Water Conference.

Speakers at United Nations 2023 Water Conference side event titled, “International and Transboundary Cooperation of Integrated Water Management: From Data Collection to Implementation”. Hydrologist Joel Groten is third from left.

Discussion between participants at United Nations 2023 Water Conference side event titled, “International and Transboundary Cooperation of Integrated Water Management: From Data Collection to Implementation”.

Speakers who presented at United Nations 2023 Water Conference side event titled, “International and Transboundary Cooperation of Integrated Water Management: From Data Collection to Implementation”.

#WATERACTION sign at the United Nations 2023 Water Conference. Large individual letter sign that states "#wateraction" with New York City skyline in background.

View of participants from behind looking forward in the United Nations general assembly at the United Nations 2023 Water Conference.

United Nations Headquarters in New York City. View looking up at United Nations headquarters building with flags in foreground.

At the USGS, we monitor our nation’s water. Our data informs many people, from kayakers to water managers. Gage Greatness allows any Twitter user to vote for their favorite gage (data collection station).

Physical Scientist Owen Stefaniak retrieves surface water samples from an autosampler at the upstream Infall site near the Air Guard 128^th Air Refueling Wing base during an overnight winter storm.

Overhead view of technician collecting a water sample of a tributary of Oak Creek, in Milwaukee, Wisconsin.