Historical photos, maps and other materials are important to gain an understanding of the water system you are working on. For the Ripples exercise of this week, we want you to find images that visualize the history of your water object. Because it is not always easy to find these images, we will give you a hand in searching for historical photos and help you look for and interpret historical maps.

First, Hilde will discuss where to look for historical materials, how to interpret them, and how to use them properly to communicate the story you want to tell.