I just think the novelty of these type of displays was up in the 90s, It’s time for an upgrayedd. I propose leprechauns flying up and down the river wearing water jet packs, shooting people with their Chicago-style hot dog cannons would be more with the times. What’s your idea?
This stuff is regularly used to mark water flows that someone wants to trace, for example when a stream disappears underground and it’s unclear where it joins the watershed again. It’s assume there’s not much to it.