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How to use a Dumpy Level Example 1

How to use a Dumpy Level Example 1. Find the difference in height between the benchmark and the top of the slope. ?. Top of Slope. Divide hill into 3 spots to make easier Otherwise too far to see or leveling staff not long enough. How to use a Dumpy Level Example 1. 9mAOD. Back sight.

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How to use a Dumpy Level Example 1

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  1. How to use a Dumpy LevelExample 1 Find the difference in height between the benchmark and the top of the slope ? Top of Slope Divide hill into 3 spots to make easier Otherwise too far to see or leveling staff not long enough

  2. How to use a Dumpy LevelExample 1 9mAOD Back sight

  3. How to use a Dumpy LevelExample 1 Rotate Dumpy round 9mAOD 2mAOD 2m Foresight Foresight Back sight Move Level to new position

  4. How to use a Dumpy LevelExample 1 Move Dumpy to new position 9mAOD 6mAOD 2mAOD Back sight Foresight Back sight

  5. How to use a Dumpy LevelExample 1 Rotate Dumpy round to new position 9mAOD 6mAOD 2mAOD Back sight Foresight Back sight Move Level to new position

  6. How to use a Dumpy LevelExample 1 9mAOD 6mAOD 2mAOD 1mAOD Back sight Foresight Back sight Foresight

  7. How to use a Dumpy LevelExample 1 Level of dumpy = 926m Level of dumpy = 922m 1mAOD 9mAOD 6mAOD 2mAOD Foresight Back sight Back sight Foresight 9m 2m 6m 1m 913m + 9m 6m + 920m

  8. How to use a Dumpy LevelExample 1 ? So the difference in height is 925m-913m=12m

  9. Example 2 I want to construct a water pipe on the hill by Vigyan Ashram To find the pressure that will result from the pipe I need to know the height difference between point A and point D A= 875mAOD B C D

  10. Example 2 A= 875mAOD B C D

  11. Example 2 Level of dumpy=879mAOD A= 875mAOD Level of dumpy=871mAOD B B= 870mAOD Level of dumpy=862mAOD 4m 9m C 2m 1m C= 860mAOD 12m 11m D D= 850mAOD

  12. Example 2

  13. Example 2 Once you have gone down the hill, check you answer by coming back up the hill

  14. Example 2 Level of dumpy=879mAOD Level of dumpy=871mAOD A= 875mAOD B Level of dumpy=862mAOD B= 870mAOD 4m 9m C 1m 2m C= 860mAOD 12m 11m D D= 850mAOD

  15. Example 2 Once you have gone down the hill, check you answer by coming back up the hill

  16. Example 2 So what was the change in height? Change in height= 25m A= 875mAOD B C D A= 850mAOD

  17. Summary Questions • What is a Dumpy Level Used for? • What 2 things can you use to check if things are level? • How does a spirit level work? • One you have done a backsight reading what would you do next with a dumpy level?

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