2. Ilz River, Inn River and Danube River, Passau, Germany
3. Ohio River and Missisippi, Illinois, U.S.A
4. Gia Lăng River and Dương Tử River , Trùng Khánh, China.
5. Rio Negro River and Rio Solimoes River , Manaus, Brazil
6. Green River and Colorado River , Utah, U.S.A
7. Thompson River and Fraser River , Lytton, Canada
8. Alaknanda River and Bhaghirathi River , Devprayag, India.
9. Mosel River and Rhine River , Koblenz, Germany.
10. Drava River and Danuve River , Osijek, Croatia
