Jun 13
This is the zig-zag spillway of Pimburaththewa Wewa, also known as Pimburattewa Tank, in Sri Lanka.
The reservoir sits near Aralaganwila, close to Maduru Oya National Park, and its striking spillway was built in the 1980s as part of the Mahaweli Development Project.
The unusual zig-zag form increases the spillway’s edge length, helping release excess water more evenly when the reservoir reaches capacity.
A modern piece of hydraulic engineering inside one of the world’s oldest water-management cultures.
