I am currently working on a pond. I need to get the stage storage grid and a hydrograph for my pond. I am using the Stage Storage Command under the Analyze Ribbon. I am not getting the proper volumes. Its like 100,000 meters off. I am clicking the Define Basin button and selecting the Surface. IT then copies all the contours, places them on top of my surface. I dont like that, but I can deal with that if the numbers are right. Am I using the wrong command? What am I doing wrong?