You may have heard people debating about joining rivers across the nation for the welfare of Agriculture. Also, the usage of large canals (artificial waterways) to divert water from the mainstream river to urban areas.
It’s not an easy task. To divert or utilize the natural stream by the canal, we have to come across many obstacles.
For an Irrigation project or any project, if we would like to carry the discharged water from the source via a canal, we have to face other mainstream obstacles such as rivers, lakes, reservoirs, and other natural barriers.
To transport the canal water across the natural stream, we need a suitable structure which is known as Cross Drainage.
For the usage purpose, we ought to cross the natural water streams to transport the water to the endpoint. Cross Drainage work is needed
Not all the natural water stream bed levels are the same along with the canal network.
So according to the designation and requirements suitable type of cross drainage should be selected to bypass the mainstream flow.
According to the need, there are 3 main types of cross drainage works
As the name suggests, the canal will pass over the drainage.
There are two hydraulic structures used in this form of drainage works. According to the Canal Bed level (CBL) to the mainstream High Flood Level (HFL), any one of the systems will be implemented.
Type II – Drainage Passes Over the Canal
As the name suggests, the drainage or mainstream will pass over the canal.
Like above, 2 Hydraulic structures will be used in this too according to the requirements.
Type III – Canal and Drainage intersects at the same level
When canal and drainage meet and intersect at the same level which can’t be avoided otherwise, there will be two hydraulic structures used such as Level Crossing, Inlet, and Outlet.
Factors Influencing the Selection of Cross Drainage Structure
From the above types and definitions, we can see the factors that influence the selection,
Hope you enjoyed reading the topic. Happy Learning 🙂
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