Stanford Engineering Puzzle

September 2006

In research in Southern California, CEE Professor Martin Reinhard and his students have found that by recycling water through a river system regional water managers can remove pollutants and recharge local supplies often protecting riparian habitats in the process.

Directions for puzzle

In this puzzle your job is to link a river to households, industry and agriculture such that the water returns to the river after serving each. When you do a "secret word" will be revealed. For fun we will post (below) the names of ten alumni who successfully complete the puzzle and e-mail the secret word in the subject line to staff member Marge Kastner. She'll post entry number 1, 11, 21, 31, 41, etc. up to 91.

You must have Flash installed to run this puzzle, which was designed by Scott Kim of Shufflebrain and programmed by Larry Doyle of Cyberiandesign.

"Winning" entries

• 1) Jack Lin
• 11) Paul Cuff
• 21) Rachel Parke-Houben
• 31) Steve Chappell
• 41) Linda Knudsen
• 51) Robert Ochoa

Try your hand at other puzzles in our puzzle archive.