Under which one of the following rivers has India's first underwater metro rail tunnel been constructed?
Hooghly
The question asks about the river under which India's very first underwater metro rail tunnel has been built. This is a significant engineering achievement and a landmark project in India's infrastructure development.
The construction of an underwater metro tunnel involves complex engineering challenges, including managing water pressure, soil conditions under the riverbed, and ensuring watertight construction.
India's first underwater metro tunnel is part of the Kolkata Metro's East-West Corridor. This corridor connects Howrah and Salt Lake City, passing beneath the Hooghly River.
The section under the river is a crucial part of the metro line, allowing commuters to travel between the two banks of the Hooghly River quickly and efficiently. The tunnels are located approximately 30 meters below the riverbed.
The tunnel section under the Hooghly River is about 520 meters long. It consists of twin tunnels, one for each direction of travel. These tunnels are built using advanced tunnelling technology, specifically Tunnel Boring Machines (TBMs).
The successful construction under the Hooghly River marks a major milestone in India's transportation infrastructure, paving the way for more such projects in the future.
Let's consider the given options:
Based on the project details of India's first underwater metro tunnel, it is located under the Hooghly River in Kolkata.
| River | Location of Underwater Metro Tunnel (India's First) |
|---|---|
| Yamuna | No |
| Ganga | No (The project is under Hooghly, a distributary) |
| Hooghly | Yes (Kolkata) |
| Gomti | No |
| Feature | Detail |
|---|---|
| Project | India's First Underwater Metro Rail Tunnel |
| River | Hooghly River |
| City | Kolkata |
| Metro Line | East-West Corridor (Line 2) |
| Underwater Section Length | Approx. 520 meters |
| Depth Below Riverbed | Approx. 30 meters |
The Kolkata Metro holds the distinction of being the first metro system in India. The East-West Corridor project, including the underwater section beneath the Hooghly River, connects important areas on both sides of the river, significantly reducing travel time between Howrah and Kolkata.
The underwater tunnels are designed with several safety features, including special concrete segments and gaskets to prevent water seepage. Ventilation and emergency evacuation systems are also integral parts of the design.
This project is a testament to India's growing capabilities in executing complex infrastructure projects and utilizing advanced technology like TBMs for challenging urban environments.
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