I realise that this is a really weird question to be asking, and I'm probably going to be put on some sort of goverment list, but it's not as malicious as it sounds.
I'm writing a short story for my creative writing degree about a small fishing village, and I want one of the characters to poison the river to kill most the fish population. I've been doing a bit of research but it's kind of a hard question to google. "How would I poison a river?"
So I figured this is as smart a bunch commenters as any other forum, so I'd ask if any of you guys could shed some light. I don't even know if it's possible, I'm guessing it would have to be applied gradually, due to the water flow. Unless it was something that could be dropped upstream and would dissolve over time.
It would be a fairly small river, not too near the river mouth and salmon would be the fish being poisoned. As simple a delivery method as possible, It's got to be feasible. It's probably do-able with several tonnes of sulphuric acid, but I don't know anyone with access to that.
Thanks for the help in advance.