On The Wissahickon explores how the Wissahickon Valley’s past, present and future can be a global model for water management and urban sustainability. The screening will be followed by a panel discussion with key voices from the film, including WVWA Executive Director, Gail Farmer and Friends of the Wissahickon Executive Director, Maura McCarthy. “On the Wissahickon,” a new documentary about the Wissahickon Valley, will premiere at the Ambler Theater on Tuesday, May 14. Presented by the Articulate Foundation and the Wissahickon Valley Watershed Association, the documentary explores how the Wissahickon Valley’s past, present, and future can serve as a global model for water management and urban sustainability. The screening will be followed by a panel discussion with key voices from the film, including Gail Farmer, the executive director of the Wissahickon Valley Watershed Association, and Maura McCarthy, the executive director of the Friends of the Wissahickon. “On the Wissahickon” is from the producers of the Emmy Award-winning PBS show “Articulate.” The documentary is based on “Metropolitan Paradise: The Struggle for Nature in the City,” a book co-authored by David Contosta and Carol Franklin. Contosta is a professor of history at Chestnut Hill College and the author of more than 20 books; Franklin is an adjunct professor of landscape architecture and regional planning at the University of Pennsylvania and a founding principal of Andropogon Associates. The event, which begins at 7 p.m. on Tuesday, May 14, is free and open to the public, though seating is limited. To register, please visit www.wissahickonfilm.org. The Ambler Theater is located at 108 E. Butler Ave., 19002.   Admission is free and seating is limited. RSVP online at the link below.