How to get water level in the past

Question

I have elevation layers for both landmark and seas where I've added together and got water rise information from it.

But I also want to check how the water level where like 1000 years ago if it rises with 0,005 meters/year for example, I can't fin any information

on either the internet or my Arcgis books how to manage it.

XanderBakker · Accepted Answer

If you assume that the water level rises with 0,005 meter/year and you want to know the level 1000 years ago, the level would be 5m below the current level. If you have depth information you could slice it with that level.