I am having 30mX30m aster DEM. Generated all files/layers with archydro also. I struck while generating a DAM (with my top elevation and bottom elevations) for my chosen location. How I can generate this on my DEM ??? After that I need to calculate stage-storage volume at 1m intervals from my DAM botton elevation to top elevation. How to generate this stage -storage volume to my DAM ?? Requesting to help me by providing step-by-step guide/doc/tutorial to understand and implement it. Either with arc gis/arc hydro or any other software/tool like autocad/bently etc.... or a combination of softwares to accomplish this.