Understanding South India's Longest Rivers

The question asks us to identify the longest river in South India from the given options. To answer this, we need to know the approximate lengths and locations of each river listed.

Analysis of the Options

Let's look at each river provided in the options:

• Narmada: The Narmada River is a major river in Central India. It flows westwards into the Arabian Sea. While part of its basin is in the northern Deccan, it is generally considered distinct from the major east-flowing peninsular South Indian rivers like Godavari, Krishna, and Cauvery. Its length is approximately 1,312 km.
• Tungabhadra: The Tungabhadra River is a significant tributary that joins the Krishna River. It flows through Karnataka and Andhra Pradesh. It is formed by the confluence of the Tunga and Bhadra rivers. Its approximate length is around 650 km.
• Godavari: The Godavari River is the second longest river in India after the Ganga and the longest in South India. It originates in the Trimbakeshwar, Nashik, Maharashtra. It flows eastwards through Maharashtra, Telangana, Andhra Pradesh, Chhattisgarh, and Odisha, draining into the Bay of Bengal. Its approximate length is about 1,465 km.
• Krishna: The Krishna River is another major east-flowing river in South India. It originates at Mahabaleshwar in Maharashtra. It flows through Maharashtra, Karnataka, Telangana, and Andhra Pradesh before joining the Bay of Bengal. Its approximate length is about 1,400 km.

Comparing River Lengths

To determine the longest river among the given options in South India, let's compare their lengths:

Based on the comparison, the Godavari River is the longest among the given options and is widely recognized as the longest river in South India. While Narmada is also long, it is often categorized differently due to its westward flow and location.

Conclusion

Comparing the lengths of the rivers provided – Narmada (~1312 km), Tungabhadra (~650 km), Godavari (~1465 km), and Krishna (~1400 km) – it is clear that the Godavari River has the greatest length. Therefore, the Godavari is the longest river among the given choices that flows predominantly through or is considered part of the South Indian river system.

Revision Table: Key South Indian Rivers

Additional Information on South Indian Rivers

South India is home to several major river systems, most of which are rain-fed and seasonal, though the larger ones maintain flow throughout the year. These rivers are crucial for irrigation, power generation, and transportation in the region.

• Most major South Indian rivers (like Godavari, Krishna, Cauvery, Mahanadi) flow eastwards into the Bay of Bengal, forming deltas.
• Rivers flowing westwards (like Narmada and Tapti) flow into the Arabian Sea and typically form estuaries. While Narmada flows partially in the Deccan region, it's often discussed separately from the east-flowing Peninsular rivers.
• The drainage basin of the Godavari River is the largest among the peninsular rivers.
• Major cities and agricultural regions are dependent on these rivers for their water supply.
• Interstate water disputes are common issues related to the sharing of water from these major rivers, such as the Krishna and Cauvery rivers.