Hello, I'm trying to calculate volumes of soil from the surface to the bedrock below. I have a DEM of the ground's surface, ground-penetrating radar points, and a raster of the smoothed depths. I reclassified my raster, broke it down into 5m depth intervals, and tried using the polygon volume tool and the surface volume tool to see what might work. So far, none of them have given me an accurate volume. They spit out a huge number that is nowhere close to what it should be. My deepest area is essentially a rectangle, so it's easy to calculate the volume, all of the tools I have used have not given me any volume, even close. I'm working in a NAD1983 UTM zone. I'm certain there is a way I can calculate the volumes in Arc pro from the topology (DEM) and the depths (Raster).
Any ideas or workflows would be greatly appreciated. Below is an image of my depth classes(colours correspond to depths) laid over my DEM to give you an idea of what I'm trying to accomplish.