CONGRATULATIONS to the first winners of #RiverCup2026: Lake Chad, Ganges-Brahmaputra, Colorado, and Murray-Darling are the #HydrologicalExtremes rivers advancing to round 2!

Voting is now LIVE for the next four matchups of round 1, #VanishingWaterTowers. Vote at www.agu-h3s.org/rivercup until 10/7!

Round 1, Matchup 5 in our #VanishingWaterTowers category:
Semliki vs Indus!

See facts below and don't forget to vote until 10/7!
www.agu-h3s.org/rivercup

Round 1, Matchup 6 in our #VanishingWaterTowers category:
Rhône vs East River!

Keep on voting and learning facts in the replies below!
Tell your friends and colleagues, all are welcome to vote in #RiverCup2026!

Note: though we appreciate the enthusiasm, duplicate votes will be duly discarded 😉

For the next matchup of Round 1 in our #VanishingWaterTowers category:
Niwot Ridge vs Upper Penticton!

Learn more about these two research catchments below and keep those votes coming at www.agu-h3s.org/rivercup

#RiverCup2026

And for the final matchup of #VanishingWaterTowers for Round 1:
Cluthu/Mata Au vs Cayambe!

Learn about these two vastly different, but equally fascinating rivers below and don't forget to vote!!!
www.agu-h3s.org/rivercup

#RiverCup2026

RIVER CUP 2026 IS LIVE!!!! This year's categories all relate to anthropogenic threats facing global rivers. First up: Eight rivers facing #HydrologicalExtremes, including droughts and flooding.

Watch out for facts about these remarkable rivers and VOTE HERE until 10/5: www.agu-h3s.org/rivercup