Rivers Quiz

Notes:
The correct answer is [B] 2 and 3 only. This question tests your knowledge of the drainage systems of Northeast India, specifically the tributaries of the Brahmaputra River versus other independent river systems.Analysis of the Rivers:

• Lohit (2 — Correct): The Lohit River is a major tributary of the Brahmaputra. It rises in eastern Tibet and flows through the Anjaw and Lohit districts of Arunachal Pradesh before entering the Assam plains. It is known for its turbulent waters and is often called the “River of Blood” due to its lateritic red soil.
• Subansiri (3 — Correct): Also known as the “Gold River,” it is the largest tributary of the Brahmaputra. It originates in the Tibet Plateau and flows through the Upper Subansiri and Lower Subansiri districts of Arunachal Pradesh before joining the Brahmaputra in Assam.
• Barak (1 — Incorrect): The Barak River originates in the Manipur Hills (near Mao Songsang). It flows through Manipur, Mizoram, and Assam (Cachar Valley) before entering Bangladesh, where it splits into the Surma and Kushiyara rivers. It does not flow through Arunachal Pradesh.

Key Tributaries of the Brahmaputra in Arunachal Pradesh:

Bank	River Name
Right Bank	Subansiri, Kameng, Manas (further downstream in Assam)
Left Bank	Dibang, Lohit, Dihing

Notes:
The correct answer is [C] 1, 3 and 4 only.The Integrated Watershed Management Programme (IWMP)—now a component of the Pradhan Mantri Krishi Sinchayee Yojana (WDC-PMKSY)—is designed to restore ecological balance by harnessing, conserving, and developing degraded natural resources such as soil, vegetative cover, and water. The core philosophy of watershed management is to “manage rain where it falls.”

• Prevention of soil runoff (1): By constructing physical barriers like contour bunds, check dams, and gully plugs, the programme slows down the speed of surface water, significantly reducing soil erosion and nutrient loss.
• Rainwater harvesting and groundwater recharge (3): The programme emphasizes “in-situ” moisture conservation. By creating farm ponds and percolation tanks, rainwater is trapped and allowed to seep into the ground, raising the water table in sun-parched regions.
• Regeneration of natural vegetation (4): Improved soil moisture and water availability naturally lead to the revival of local flora. The programme often includes “afforestation” and “pasture development” to create a green cover that further prevents erosion.

Why 2 is Incorrect:

• Linking of Rivers: This refers to the National River Linking Project (NRLP), which is a massive-scale engineering project managed by the National Water Development Agency.
• Scale Difference: Watershed management is a decentralized, micro-level approach (usually focusing on a specific drainage basin or village cluster). Linking perennial rivers (like the Ganga) with seasonal rivers (like the Cauvery) is a macro-level inter-basin transfer project that involves entirely different infrastructure and objectives.

Key Objectives of IWMP:

Objective	Method
Water Security	Check dams, farm ponds, and de-silting of tanks.
Soil Health	Contour trenching and leveling of land.
Livelihood	Promoting self-help groups (SHGs) and sustainable farming.

Notes:
The correct answer is [A] 1 only.This question addresses a unique geological anomaly in the Indian drainage system. While most major peninsular rivers (like the Godavari, Krishna, and Kaveri) follow the general plateau slope toward the Bay of Bengal, the Narmada and Tapi defy this trend.

• 1. It occupies a linear rift valley: (Correct)
  The primary reason the Narmada flows west is that it flows through a rift valley (a graben) formed by the subsidence of a land block between two parallel faults. This structural depression was created during the upheaval of the Himalayas. The river is essentially “trapped” in this valley, which tilts toward the West, forcing the water to flow into the Arabian Sea.
• 2. It flows between the Vindhyas and the Satpuras: (True, but not the reason)
  It is a geographical fact that the Narmada flows between the Vindhya range (to the north) and the Satpura range (to the south). However, simply being between two ranges doesn’t explain the direction of flow. It is the rift valley structure within these ranges that dictates the westward movement. In multiple-choice questions of this nature, you must distinguish between a fact and a causal reason.
• 3. The land slopes to the west from Central India: (Incorrect)
  The general slope of the Indian Peninsula is actually from West to East. This is why the Western Ghats are higher than the Eastern Ghats and why most rivers flow toward the Bay of Bengal. The Narmada is an exception because it follows the local slope of the rift valley, not the general slope of the subcontinent.

Notes:
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Notes:
The correct answer is 1 and 2 only. The National Water Mission (NWM) is one of the eight missions under the National Action Plan on Climate Change (NAPCC). Its main objective is “conservation of water, minimizing wastage and ensuring its more equitable distribution both across and within States through integrated water resources development and management.”

• Recycling of Wastewater (Statement 1 is Correct): One of the key goals of the NWM is to increase water use efficiency by 20%. This includes a major focus on urban water management, specifically incentivizing the recycling of wastewater (gray water) to meet non-potable water needs in cities.
• Sea Water Desalination (Statement 2 is Correct): The mission explicitly identifies the need to promote technologies for the utilization of ocean water in coastal cities. This involves setting up desalination plants where alternative freshwater sources are inadequate or over-exploited.
• Interlinking of Rivers (Statement 3 is Incorrect): While the interlinking of rivers is a separate national project (National Perspective Plan), it is not a core component or a direct consequence of the “proper and complete implementation” of the National Water Mission. The NWM focuses more on management, efficiency, and conservation rather than massive structural engineering across the entire Himalayan and Peninsular systems.
• Reimbursement for Bore-wells (Statement 4 is Incorrect): The mission aims at sustainable groundwater management and reducing over-dependence on aquifers. Providing a 100% reimbursement for digging bore-wells and installing pump-sets would contradict the mission’s goal of water conservation, as it would incentivize further groundwater depletion.

Notes:
The correct answer is Bhitarkanika. The two rivers described are the Brahmani and the Baitarani.

• The River from Jharkhand: The South Koel river originates in the Chota Nagpur Plateau of Jharkhand. It flows into Odisha, where it joins the Sankh river at Vedvyas (near Rourkela). From this confluence onwards, the river is known as the Brahmani.
• The River from Odisha: The Baitarani river originates in the Guptaganga hills (Gonasika) of the Keonjhar district in Odisha.
• The Confluence: These two rivers (Brahmani and Baitarani) form a common deltaic plain and merge at a place called Dhamra, just before emptying into the Bay of Bengal.

Notes:
The correct answer is [B]. The dramatic “U” turn of the Brahmaputra (known as the Tsangpo in Tibet) as it enters India through Arunachal Pradesh is one of the most striking geological features of the Himalayan range.

• Syntaxial Bends: The Himalayas do not run in a perfectly straight line. At both the western and eastern extremities, the mountain ranges take sharp, knee-like bends southward. These are known as Syntaxial Bends.
• The Eastern Syntaxis: The eastern bend occurs near the peak of Namcha Barwa. Here, the geological strata are sharply folded. The Brahmaputra river, which flows eastward in Tibet, hits this structural “wall” and is forced to carve a deep gorge and turn sharply south and then west into the Assam valley.
• Geological Youth: Because the Himalayas are “Young Fold Mountains,” they are still tectonically active. The specific structural weakness and the sharp bending of the mountain folds at this junction provide the path of least resistance for the river to cut through.

Notes:

1. Shakyas → Rohini: Correct. The Shakya clan, based at Kapilavastu, was separated from the Koliyas by the Rohini River, which was a subject of a famous irrigation dispute involving the Buddha.
2. Koliyas → Son: Incorrect. The Koliya clan, with main settlements at Ramagama and Devadaha, lived near the Shakyas and were situated near the Rohini River and the Anoma/Rapti River, not the Son River. The Son River flows far to the south, merging with the Ganga near Patna. Both the Shakyas and Koliyas were located on opposite banks of the Rohini River. 
3. Mallas → Gandak: Correct. The Mallas of Kusinara and Pava operated in the region bordered or traversed by the Gandak River (Narayani) in present-day Uttar Pradesh/Bihar.
4. Vajjis → Ganga: Correct. The Vajji (or Vrijji) confederacy, which included the Licchhavis, was located in the Vaishali region of Bihar, which is located near the Ganges (Ganga) River.

Notes:
Himachal Pradesh is traversed by five major rivers from the Indus system. The Beas, Chenab, Ravi, and Sutlej are tributaries of the Indus River, while the Yamuna is a tributary of the Ganges. All five rivers flow through Himachal Pradesh at various points in their courses. The Sutlej is the longest river in the state, originating from the Tibetan plateau. The Chenab and Ravi join together in Punjab, and the Beas also flows into Punjab. The Yamuna starts from the Yamunotri Glacier in the eastern Himalayas and passes through eastern Himachal Pradesh. Therefore, option (d) correctly identifies all five rivers that pass through the state.

Notes:
The Dul Hasti Power Station is a run-of-river hydroelectric power station located on the Chenab River in Himachal Pradesh, India. Commissioned in 2007, it has an installed capacity of 390 MW. The Chenab River, a key tributary of the Indus River system, supports India’s renewable energy efforts by providing clean hydroelectric power through this significant infrastructure project.