Which one among the following is the correct sequence of the rivers from north to south ?

1. Classification of Indian Drainage Systems (basic)

Welcome to your first step in mastering Indian Geography! To understand Indian rivers, we must first look at the big picture: how they are classified. The drainage systems of India are primarily shaped by the broad relief features of the subcontinent and their geological history. While there are various ways to group these rivers—such as by their size (catchment area) or where they empty their water—the most fundamental and widely accepted classification is based on their mode of origin and nature. This divides Indian rivers into two major groups: the Himalayan Drainage and the Peninsular Drainage CONTEMPORARY INDIA-I, Geography, Class IX, Drainage, p.17.

The Himalayan rivers (like the Indus, Ganga, and Brahmaputra) are perennial, meaning they flow year-round because they receive water from both rainfall and melting snow from the high peaks. In contrast, the Peninsular rivers are much older and are generally seasonal, as their flow is heavily dependent on monsoon rainfall. Geologically, the Peninsular system is considered more "mature," evidenced by its broad, shallow valleys and rivers that have largely reached a graded profile INDIA PHYSICAL ENVIRONMENT, Geography Class XI, Drainage System, p.23. Interestingly, some rivers like the Chambal, Betwa, and Son originate in the Peninsular highlands but actually belong to the Himalayan (Ganga) river system INDIA PHYSICAL ENVIRONMENT, Geography Class XI, Drainage System, p.19.

Another vital way to classify these systems is by their orientation and discharge. About 77% of India’s drainage area is oriented toward the Bay of Bengal, while the remaining 23% (including the Indus, Narmada, and Tapi) drains into the Arabian Sea. In the Peninsula, the Western Ghats act as the primary water divide. While most major rivers like the Mahanadi and Godavari flow eastwards due to a slight tilting of the Peninsular block, the Narmada and Tapi are exceptions that flow west through trough faults INDIA PHYSICAL ENVIRONMENT, Geography Class XI, Drainage System, p.23.

Feature	Himalayan Rivers	Peninsular Rivers
Nature of Flow	Perennial (Rain + Snowmelt)	Seasonal (Monsoon dependent)
Geological Age	Young and active	Old and matured
Valley Shape	Deep gorges, V-shaped valleys	Broad, shallow, graded valleys

Sources: CONTEMPORARY INDIA-I, Geography, Class IX, Drainage, p.17; INDIA PHYSICAL ENVIRONMENT, Geography Class XI, Drainage System, p.19; INDIA PHYSICAL ENVIRONMENT, Geography Class XI, Drainage System, p.23

2. Major East-Flowing Peninsular Basins (basic)

To understand the Peninsular Drainage System, we must first look at the landscape's history. Unlike the youthful, Himalayan rivers that are still carving deep valleys, Peninsular rivers are much older and have reached a state of maturity. The primary water divide in Peninsular India is the Western Ghats, which runs close to the western coast from north to south CONTEMPORARY INDIA-I, Geography, Class IX NCERT, Drainage, p.21. Because the Indian plateau has a gentle tilt from west to east, most major rivers originate near the Western Ghats and flow toward the Bay of Bengal, creating fertile deltas at their mouths INDIA PHYSICAL ENVIRONMENT, Geography Class XI, Structure and Physiography, p.9.

When we travel from North to South along the eastern coast, we encounter several distinct river basins. Starting in the north, the Damodar River rises in the Chotanagpur Plateau (Jharkhand) and flows through West Bengal to join the Hooghly. Moving south into Odisha, we find the Brahmani River, which is uniquely formed by the meeting of two smaller rivers, the Koel and the Sankh, at Rourkela. Further south is the Mahanadi, a major river originating in the highlands of Chhattisgarh (near Sihawa) that serves as a vital water source for Odisha Geography of India, Majid Husain, The Drainage System of India, p.41. Finally, as we move into the heart of the Deccan, we encounter the Tungabhadra; though it is a tributary of the Krishna river, it is a massive system in its own right, flowing through Karnataka and Andhra Pradesh.

The following table helps differentiate these key basins by their origin and geographical reach:

River	Origin Point	Major States Covered
Damodar	Chotanagpur Plateau	Jharkhand, West Bengal
Brahmani	Confluence of Koel & Sankh	Odisha, Jharkhand
Mahanadi	Sihawa (Chhattisgarh)	Chhattisgarh, Odisha
Tungabhadra	Western Ghats (Varaha Parvat)	Karnataka, Andhra Pradesh, Telangana

Sources: CONTEMPORARY INDIA-I, Geography, Class IX NCERT, Drainage, p.21; INDIA PHYSICAL ENVIRONMENT, Geography Class XI, Structure and Physiography, p.9; Geography of India, Majid Husain, The Drainage System of India, p.41

3. Drainage of the Chotanagpur Plateau (intermediate)

The Chotanagpur Plateau, often called the 'Ruhr of India' due to its mineral wealth, acts as a significant drainage divide in eastern India. Unlike the long, meandering rivers of the North Indian plains, the rivers here are seasonal and follow a radial drainage pattern, meaning they flow out in different directions from the plateau's central highland. The drainage is primarily characterized by rivers that have carved deep valleys and, in some cases, flow through rift valleys created by ancient tectonic movements.

The most prominent river of this region is the Damodar. It rises in the hills of western Jharkhand and flows west to east through a rift valley, draining the Ranchi and Hazaribagh plateaus. Historically known as the 'Sorrow of Bengal' due to its devastating floods, its temperament was tamed by the Damodar Valley Corporation (DVC), established in 1948 as India's first multipurpose river valley project Geography of India, Majid Husain, Regional Development and Planning, p.60. The Damodar is joined by several key tributaries, the largest being the Barakar, which meets it near Asansol. Other notable tributaries include the Konar and the Bokaro rivers Geography of India, Majid Husain, The Drainage System of India, p.16.

To the south of the Damodar basin lies the Brahmani River system. This river has a unique origin; it is formed by the confluence of two mountain streams—the South Koel and the Sankh—which join at Rourkela in Odisha Geography of India, Majid Husain, The Drainage System of India, p.20. Together with the Subarnarekha (which means 'Streak of Gold' and flows past Jamshedpur), these rivers drain the southern and eastern slopes of the plateau toward the Bay of Bengal. The drainage of this region is essential not just for agriculture but for the massive industrial clusters of the Damodar and Subarnarekha valleys.

River	Key Characteristics	Major Infrastructure/Tributary
Damodar	Flows through a rift valley; merges into Hooghly.	Barakar River; Tilaiya & Maithon Dams.
Brahmani	Formed by confluence at Rourkela.	Koel and Sankh rivers.
Subarnarekha	Flows through Ranchi and Jamshedpur.	Hundru Falls (Ranchi).

Sources: Geography of India ,Majid Husain, (McGrawHill 9th ed.), The Drainage System of India, p.16; Geography of India ,Majid Husain, (McGrawHill 9th ed.), Regional Development and Planning, p.60; Geography of India ,Majid Husain, (McGrawHill 9th ed.), The Drainage System of India, p.20

4. Tributaries and Sub-basins of the South (intermediate)

To master the drainage of Peninsular India, we must look at the geography from a latitudinal perspective (North to South). The peninsular rivers are older than the Himalayan rivers and follow the general tilt of the plateau from West to East. Starting in the north of this region, the Damodar River rises in the Chotanagpur Plateau of Jharkhand. Often called the 'Sorrow of Bengal' due to historical flooding, it eventually joins the Hooghly river (a distributary of the Ganga). Moving slightly south into the state of Odisha, we find the Brahmani River, which is uniquely formed by the confluence of two smaller rivers—the Koel and the Sankh—near Rourkela. Continuing southward, we encounter the Mahanadi, the largest river of the Odisha region. It originates in the highlands of Chhattisgarh near Sihawa and is famous for its massive delta and the Hirakud Dam. While the Mahanadi is a major peninsular river CONTEMPORARY INDIA-I, Drainage, p.24, the systems further south are dominated by the Krishna River basin. The Krishna originates near Mahabaleshwar in the Western Ghats and flows for about 1,400 km CONTEMPORARY INDIA-I, Drainage, p.22. Its most significant southern tributary is the Tungabhadra, which itself is formed by the union of the Tunga and Bhadra rivers in Karnataka. Understanding the drainage basins is also about knowing which states they serve. For instance, while the Mahanadi and Brahmani are central to Odisha, the Krishna basin is shared by Maharashtra, Karnataka, Telangana, and Andhra Pradesh INDIA PHYSICAL ENVIRONMENT, Drainage System, p.24.

River/Tributary	Regional Context	Key Feature
Damodar	Jharkhand/West Bengal	Tributary of the Hooghly; Chotanagpur origin.
Brahmani	Odisha	Formed by Koel and Sankh rivers.
Mahanadi	Chhattisgarh/Odisha	Originates in Sihawa; major East-flowing river.
Tungabhadra	Karnataka/Andhra Pradesh	Largest southern tributary of the Krishna river.

Sources: CONTEMPORARY INDIA-I, Drainage, p.22, 24; INDIA PHYSICAL ENVIRONMENT, Drainage System, p.24; Geography of India, The Drainage System of India, p.21

5. River Confluences and Specific Origins (intermediate)

In Indian geography, the origin of a river refers to its headwaters, while a confluence is the specific point where two or more rivers meet to form a larger stream. Understanding these points is crucial because they often mark shifts in a river's name, character, and volume. For instance, the mighty Ganga is only officially born at Dev Prayag, where the Alaknanda (originating from the Satopanth Glacier) meets the Bhagirathi (originating from the Gangotri Glacier) Geography of India, Majid Husain, The Drainage System of India, p.12. The Alaknanda is particularly famous for its series of five confluences known as the Panch Prayag, which follow a specific downstream sequence as it descends through the Himalayas.

Moving to the Peninsular region, we see different patterns. Some rivers are formed by the union of two roughly equal streams in the plateau. A prime example is the Brahmani river in Odisha, which is formed by the confluence of the Koel and Sankh rivers at Rourkela Geography of India, Majid Husain, The Drainage System of India, p.20. Other major rivers have very specific points of origin in the highlands: the Mahanadi rises near Sihawa in the Raipur district of Chhattisgarh INDIA PHYSICAL ENVIRONMENT, Geography Class XI, Drainage System, p.23, while the Damodar originates in the Chotanagpur Plateau of Jharkhand before flowing into the Hooghly.

Finally, confluences in the plains often serve as vital water-sharing or ecological junctions. In the Indus system, the Satluj and Beas rivers meet at Harike in Punjab Geography of India, Majid Husain, The Drainage System of India, p.10. This site is not just a confluence but a major wetland and the starting point for the Indira Gandhi Canal. Geographically, these rivers follow a distinct latitudinal pattern: the Damodar is the northernmost in this set, followed by the Brahmani and Mahanadi in the Odisha belt, with the Tungabhadra (a tributary of the Krishna) located much further south in the Deccan plateau.

Confluence Point	Rivers Meeting	Resulting River/Significance
Dev Prayag	Alaknanda + Bhagirathi	Ganga
Rourkela	Koel + Sankh	Brahmani
Harike	Satluj + Beas	Harike Wetland / Canal Intake
Rudra Prayag	Alaknanda + Mandakini	Lower Alaknanda

Sources: Geography of India, Majid Husain, The Drainage System of India, p.10, 12, 20; INDIA PHYSICAL ENVIRONMENT, Geography Class XI, Drainage System, p.23

6. Latitudinal Mapping of Eastern Rivers (exam-level)

To master the geography of India, one must look beyond simple river names and understand their latitudinal arrangement—their relative positions from North to South. This spatial awareness is a frequent theme in competitive exams. We begin our journey in the Chotanagpur Plateau of Jharkhand with the Damodar River. Known as the 'Sorrow of Bengal' historically, it flows eastward through West Bengal to join the Hooghly Geography of India, Majid Husain, Chapter 15, p.60. Because its basin is tied to the northern parts of the plateau, it serves as our northernmost anchor in this sequence. Moving southward into the state of Odisha, we encounter a pair of rivers often studied together: the Brahmani and the Mahanadi. The Brahmani is formed by the confluence of the Koel and Sankh rivers near Rourkela. Just south of the Brahmani lies the Mahanadi, a massive system originating near Sihawa in Chhattisgarh INDIA PHYSICAL ENVIRONMENT, Geography Class XI, Drainage System, p.19. While both drain into the Bay of Bengal, the Mahanadi's main deltaic region is situated geographically south of the Brahmani's mouth. Finally, we transition from the eastern coastal plains deep into the Deccan Plateau. Here, we find the Tungabhadra. Unlike the others, the Tungabhadra is a major tributary of the Krishna River, formed by the union of the Tunga and Bhadra rivers in the Western Ghats of Karnataka. Flowing through Karnataka and Andhra Pradesh, its latitude is significantly further south than the Damodar-Mahanadi complex of the Odisha-Bengal region CONTEMPORARY INDIA-I, Geography Class IX, Drainage, p.21.

River	Region/Origin	Relative Latitude
Damodar	Chotanagpur (Jharkhand/WB)	Northernmost
Brahmani	Chotanagpur/Odisha	Middle-North
Mahanadi	Dandakaranya/Odisha	Middle-South
Tungabhadra	Western Ghats (Karnataka/AP)	Southernmost

Sources: Geography of India, Regional Development and Planning, p.60; INDIA PHYSICAL ENVIRONMENT, Geography Class XI, Drainage System, p.19; CONTEMPORARY INDIA-I, Geography Class IX, Drainage, p.21

7. Solving the Original PYQ (exam-level)

Now that you have mastered the drainage basins of India, this question tests your ability to stack those individual pieces—the Chotanagpur Plateau, the Odisha Highlands, and the Deccan Plateau—into a coherent latitudinal map. You’ve learned that the Damodar is a key component of the Hooghly-Bhagirathi system in the north, while the Tungabhadra is a major tributary of the Krishna River in the deep south. This question isn't just about memorizing names; it's about visualizing the spatial relationship between the major and minor peninsular rivers as described in INDIA PHYSICAL ENVIRONMENT, Geography Class XI (NCERT 2025 ed.).

To arrive at the correct sequence, let's trace the map mentally from North to South. We begin with the Damodar River, which rises in Jharkhand and flows through West Bengal. Moving south into the northern part of Odisha, we encounter the Brahmani, formed by the confluence of the Koel and Sankh rivers. Just below the Brahmani lies the vast basin of the Mahanadi. Finally, we must look much further south toward the Karnataka-Andhra border to find the Tungabhadra, which flows in the semi-arid regions of the Deccan. This logical progression confirms that (A) Damodar-Brahmani-Mahanadi-Tungabhadra is the only sequence that accurately reflects the physical geography of the subcontinent.

UPSC often sets "traps" by shuffling rivers that are geographically adjacent. In Option (B), the sequence swaps the Mahanadi and Brahmani; while they both flow through Odisha, the Brahmani's confluence point at Rourkela is latitudinally north of the Mahanadi's origin near Sihawa. Options (C) and (D) are easily eliminated if you recall the zonal distribution of river systems: the Tungabhadra, as a Krishna tributary, is located significantly further south in the Peninsular region compared to the Chotanagpur and Odisha river clusters, as detailed in Geography of India, Majid Husain.