Rajaram, HariharÌý1Ìý;Ìýµþ²¹³ó°ùÌý, Jean MÌý2Ìý;Ìýµþ±ôö²õ³¦³ó±ô, GünterÌý3Ìý;ÌýCai, XimingÌý4Ìý;²Ñ²¹³¦°ì²¹²âÌý, D. ScottÌý5Ìý;ÌýMichalak, AnnaÌý6Ìý;ÌýMontanari, AlbertoÌý7Ìý;ÌýSanchez-Villa, XavierÌý8

1Ìýºù«ÍÞÊÓƵ
2ÌýUniversity of Wisconsin MadisonÌý
3ÌýVienna University of Technology
4ÌýUniversity of Illinois Urbana-Champaign
5ÌýUniversity at Buffalo, The State University of New York
6ÌýCarnegie Institution for Science
7ÌýUniversity of Bologna
8ÌýUniversitat Politecnica de Catalunya Barcelona Tech

The year 2015 marks the 50th anniversary of Water Resources Research (WRR), which was founded in 1965. More than 15,000 papers have been published in WRR since its inception, and these papers have been cited more than 430,000 times. The history of hydrology and the water sciences are also reflected in WRR, which has served as a premier publication outlet and instigator of scientific growth over the last 50 years. The legacy of WRR provides a strong scientific foundation for the hydrology community to rise to the challenges of sustainable water resources management in a future where dramatic environmental change and increasing human population are expected to stress the world's water resources from local to global scales.