Irrigation Engineering

131. Which one of the following statements is correct?

1. The canal system and the drainage system are complementary
2. The canal system runs on ridges, gets divided into smaller channels and spreads its water on the land
3. The drainage system runs along the lowest line, collects drainage water from the slopes and joins the main stream
4. All the above

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132. While deciding the alignment of a proposed canal taking off from a river at B, three alignments of approximately equal lengths are available. These cross a drainages at C₁, C₂and C₃ where drainage bed levels C1 > C2 > C3, you will provide at site C₃

1. An aqueduct
2. A syphon aqueduct
3. A super passage
4. A syphon

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