is this trigger possible? need expert help

i have made a triggger so that when a certain unit is killed the water on my map is changed from blue to red using the enviroment\tint water trigger, to make it look like his blood has coloured the water.

the problem is it changes all the water on whole map but i only want it to change a small section is this possible if so any ideas on how to do it?

pls help

naby you can just use a special effect on the area where he dies.

na the water its self has to turn red but thanks anyway you see i need it for another map aswell for different reason, must to be able to alter colour of water within a certain region some one know how to do it?

maybe you can find it within yourself to only make the water to be bloody as your only waterhole in the entire map?

it seems to trigger how u want it really does take expert hard work, is it even possible?

use a special effect that has alot of blood. And set it slightly above the water so it looks like the water is bloody.

In WE isn't trigger that allows it. Create special effect with blood is the best idea.