5 Questions
When are cross-drainage works normally not necessary after a canal is taken to the watershed?
Cross-drainage works are normally not necessary after a canal is taken to the watershed unless the canal leaves the watershed for some distance forming a loop.
Explain what a cross drainage work is and when it is necessary.
A cross drainage work is a structure carrying the discharge of a natural stream across a canal intercepting the stream. It is necessary when a canal is to be taken to the watershed and crosses a number of natural streams in the distance between the reservoir to the watershed.
Why are cross-drainage works generally considered a costly item?
Cross-drainage works are generally considered a costly item due to their construction and maintenance requirements.
What are the two methods recommended for avoiding cross-drainage works as far as possible?
The two methods recommended for avoiding cross-drainage works as far as possible are (i) diverting one stream into another, or (ii) changing the alignment of the canal so that it crosses below the junction of two streams.
What are the types of cross-drainage works based on relative levels and discharges?
The types of cross-drainage works based on relative levels and discharges may be of the following types: C.D. Works carrying canal over the drainage.
Test your knowledge of cross drainage works with this quiz. Explore the purpose and structure of these works, as well as their importance in canal systems. See how much you know about managing natural stream discharge across canals.
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