Understanding River Tributaries in India

This question asks us to identify the main river to which 'Ong' and 'Tel' are tributaries. Understanding the river systems of India is an important part of geography.

A tributary is a freshwater stream that feeds into a larger stream or river. The Ong and Tel rivers are significant streams that contribute their water to a major river in Eastern India.

Identifying the Ong and Tel Rivers

Let's look at the Ong and Tel rivers:

• Ong River: This river originates in the hills of Chhattisgarh and flows eastward.
• Tel River: This is one of the longest tributaries of the Mahanadi river. It originates in southern Odisha and flows north-eastward before joining the Mahanadi.

Both the Ong and Tel rivers are known to join the Mahanadi river.

The Mahanadi River System

The Mahanadi is a major river in East Central India. It flows through the states of Chhattisgarh and Odisha. It is one of the largest peninsular rivers. The Mahanadi river has several tributaries that join it along its course, contributing to its volume.

Key facts about the Mahanadi river:

• Originates in the Dandakaranya range of Chhattisgarh.
• Flows through Odisha and finally drains into the Bay of Bengal.
• Important for irrigation and power generation (e.g., Hirakud Dam).
• Notable tributaries include the Seonath, Jonk, Hasdeo, Mand, Ib (left bank) and Ong, Tel, Udanti (right bank).

Based on geographical studies and river mapping, the Ong and Tel are well-established tributaries of the Mahanadi river.

Analyzing the Options

Let's consider the given options:

• Krishna River: This is a major river in South India. Its tributaries include the Bhima, Tungabhadra, Ghataprabha, Malaprabha, Musi, etc. Ong and Tel are not tributaries of the Krishna.
• Mahanadi River: As discussed above, the Ong and Tel rivers are indeed tributaries of the Mahanadi river.
• Kaveri River: This is another major river in South India. Its tributaries include the Hemavati, Shimsha, Arkavathi, Kabini, Bhavani, Noyyal, Amaravati, etc. Ong and Tel are not tributaries of the Kaveri.
• Ganga River: The Ganga is the longest river in India, flowing through the northern plains. Its major tributaries include the Yamuna, Kosi, Gandak, Ghaghara, Son, etc. Ong and Tel are not tributaries of the Ganga.

Therefore, the Ong and Tel are tributaries of the Mahanadi river.

Conclusion

The Ong and Tel rivers are significant tributaries that join the Mahanadi river, contributing to its flow, particularly during the monsoon season. This makes the Mahanadi river the correct answer.

Revision Table: Important Indian Rivers and Tributaries

Additional Information: Significance of Tributaries

Tributaries play a crucial role in a river system. Here's why they are important:

• Water Volume: Tributaries collect water from their drainage basins and add it to the main river, increasing its volume and flow.
• Sediment Transport: They carry sediments, nutrients, and organic matter, which can enrich the soil in the floodplains of the main river.
• Ecosystem Support: River systems, including tributaries, support diverse ecosystems, providing habitats for aquatic life and vegetation.
• Human Use: Tributaries are often used for local water supply, irrigation, and small-scale transportation before joining the main river.
• Shaping Landscape: Like main rivers, tributaries erode and deposit material, shaping the local landscape.

Understanding the network of tributaries helps in managing water resources, controlling floods, and preserving the ecological health of a river basin.