Grand Ethiopian Renaissance Dam by Asrat Birhanu
To clarify, when I mentioned 615 meters, I was referring to a height of 615 meters above sea level (asl). Regarding the difference between measuring in ground bed in meters and above sea level: Ground bed elevation refers to the height of the dam relative to the local ground surface. Elevation above sea level refers to the height of the dam relative to a reference point (mean sea level).
To convert ground bed height to height above sea level, you need to know the elevation of the ground at the base of the dam above sea level. Add the ground bed height to this elevation, and you will have the dam height above sea level.
Here are the examples with the correct measurements:
Example 1: Maximum water level with dam: 645 meters asl Maximum storage level: 640 meters asl (open spillway at full supply level) River bottom: 500 meters asl Main dam height: 145 meters (from the ground) Maximum height of water storage: 140 meters (from the ground)
Example 2: Tunnel underneath and in front of saddle dam: starts at 580 meters asl Tunnel rises to 610 meters asl Height of the tunnel: approximately 30 meters (from the ground) I hope this clears up any confusion. Please let me know if you have any more questions or need further clarification.
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