This video explains how to calculate area and volume of a reservoir using a functional surface above or below a reference plane in ArcGIS 10.
https://www.youtube.com/watch?v=TIKkVdHsk9I

This video explains how to calculate area and volume of a reservoir using a functional surface above or below a reference plane in ArcGIS 10.
https://www.youtube.com/watch?v=TIKkVdHsk9I