Scorched earth though could refer only to the destruction of vital bridges, railroads, water projects such as dams. A short term event such as the flooding of a key province in the face of a massive defeat and retreat is possible.
An event similiar to the National Chinese event of flooding several river provinces in the early stages of the war against Japan was not strictly speaking a massacre though many civilians died due to the flooding.
The problem is not the idea of degrading the infra. of a province, but rather making it permanent with the only solution being to rebuild the lost infra. with IC.
Point of fact just about everyone in the world during war burns bridges, throws iron and steel rails from railroads into fires, demolishes the businesses and factories of the enemy and their own when on the offensive or defensive. Never in the history of the world, until the modern UN era(1998-present), has anyone considered blowing up a bridge a war crime, even though blowing up that bridge might severely effect the population of the region.
Sherman once said "War is hell." This was supposedly what he said as Atlanta burned to the ground. Destruction of property is NOT MURDER! What the forum rules are against is people who want to rehash the worst offenses of the Nurmemberg Trial defendents. The game already has events where certain countries destroy dikes and dams to make terrain impassible. The game was designed with infra. degraded as a conquering army moves through from either side.