Event type for block placement and block update

In order to modify a block's behavior (in this case, that of water) upon its placement and whenever it is scheduled for an update by the placement of a neighboring block or otherwise, which event type do I use?

I tested with

@SubscribeEvent
public void eventNotify(BlockEvent event)
{
MinecraftServer.getServer().getConfigurationManager().sendChatMsg(new ChatComponentText("some event"));
}

and determined it is not any of the BlockEvent events (though breaking a block clearly is).

I am learning about modding and am researching the Java as I go so if I have misunderstood something on that front, I apologize.

The event type I am looking for is not apparent from the name in any of the subclasses of event which I can see here http://cmicro.github.io/NeatCraft/forge-javadoc/cpw/mods/fml/common/eventhandler/Event.html .

Any help is very much appreciated; thank you.