The following details pertain to the crossing of a canal and a drain. Bed level of Canal = + 131.3 m; Full Supply depth of Canal = 1.6 m; Bed level of Drain = + 129.5 m; High Flood Level of drain = + 131.6 m. The suitable type of Cross drainage work is:
1
Syphon aqueduct
2
Aqueduct
3
Superpassage
4
Canal Syphon