All questions of Drainage for Class 9 Exam

The Guru Gobind Sagar Lake differs from the rest of the lakes in the group.

Reasons:

Location:
- The Guru Gobind Sagar Lake is located in the state of Himachal Pradesh, while the other lakes are located in Uttarakhand and Jammu and Kashmir.

Origin:
- The Guru Gobind Sagar Lake is a man-made reservoir, created by the Bhakra Dam on the Sutlej River. In contrast, the other lakes are natural or semi-natural.

Purpose:
- The Guru Gobind Sagar Lake was created primarily for hydroelectric power generation, irrigation, and drinking water supply. The other lakes do not have such a specific purpose.

Size:
- The Guru Gobind Sagar Lake is much larger than the other lakes, with a surface area of about 170 square kilometers. In comparison, Dal Lake has a surface area of about 18 square kilometers, Nainital Lake has a surface area of about 1.5 square kilometers, and Bhimtal Lake has a surface area of about 1.2 square kilometers.

Tourism:
- While the other lakes are popular tourist destinations, the Guru Gobind Sagar Lake is not as well-known as a tourist spot. It is mainly visited by people interested in water sports and fishing.

In conclusion, the Guru Gobind Sagar Lake differs from the rest of the lakes in the group due to its location, origin, purpose, size, and popularity as a tourist destination.

False

Explanation:
Perennial rivers are those rivers which flow throughout the year. Most of the Peninsular rivers are not perennial in nature. These rivers depend on rainfall for their flow and hence, they dry up during summers. Some of the major Peninsular rivers such as Godavari, Krishna, Cauvery, etc. have a seasonal flow and are not perennial. However, some of the Peninsular rivers such as Narmada and Tapti have a perennial flow as they originate from the mountains and are not solely dependent on rainfall. Hence, the statement that most of the Peninsular rivers are perennial is false.

Length of River Ganga Drainage Basin

The total length of River Ganga drainage basin is 2500 km.

Explanation

The River Ganga is one of the largest rivers in India and has a significant impact on the country's culture, economy, and environment. The river flows through several states in northern India, including Uttarakhand, Uttar Pradesh, Bihar, Jharkhand, and West Bengal. The Ganga basin is also one of the most densely populated regions in the world.

The River Ganga drainage basin is the area of land drained by the river and its tributaries. The length of the drainage basin is measured from the source of the river in the Himalayas to the point where it meets the Bay of Bengal. The total length of the River Ganga drainage basin is approximately 2,500 km.

The River Ganga is considered holy by Hindus and is a significant pilgrimage site. It is also an essential source of water for agriculture, industry, and domestic use. However, the river is facing several challenges, including pollution, climate change, and overuse. The Indian government has launched several initiatives to clean up the river and prevent further degradation.

Conclusion

In conclusion, the total length of the River Ganga drainage basin is 2,500 km. The river is an essential resource for India and its people, but it is also facing significant challenges. It is crucial to take steps to protect and preserve the river for future generations.

**The source of the river Narmada is Amarkantak.**

The river Narmada, one of the major rivers in India, originates from the Amarkantak plateau. It is located in the Maikal Mountains, which is part of the Vindhya Range. Amarkantak is a pilgrimage town situated at an altitude of around 1065 meters in the Anuppur district of Madhya Pradesh.

**Amarkantak**:
- Amarkantak is considered a sacred place by Hindus as it is believed to be the meeting point of the Vindhya Range and the Satpura Range, which are two important mountain ranges in central India.
- It is believed that the Narmada River emerges as a result of the union of two small streams, namely, the Sonbhadra and the Johila, at the origin point in Amarkantak.
- The Sonbhadra stream originates from the east while the Johila stream originates from the west. They converge at the Amarkantak plateau to form the Narmada River.

**Vindhya Range**:
- The Vindhya Range is a range of hills and mountains that runs parallel to the Narmada River in central India.
- It extends from eastern Gujarat through Madhya Pradesh and into southeastern Uttar Pradesh.
- The Vindhya Range acts as a watershed between the rivers flowing into the Arabian Sea and those flowing into the Bay of Bengal.
- It is a prominent feature in the landscape of central India and is known for its rich biodiversity and scenic beauty.

**Satpura Range**:
- The Satpura Range is another important mountain range in central India.
- It runs parallel to the Vindhya Range and forms the southern boundary of the Narmada River basin.
- The Satpura Range is known for its dense forests, wildlife sanctuaries, and hill stations.
- Several rivers, including the Tapti and the Narmada, originate from this range.

In conclusion, the river Narmada has its source at Amarkantak, which is located in the Maikal Mountains of the Vindhya Range. The belief that the Narmada River is formed by the union of the Sonbhadra and Johila streams at Amarkantak makes it a significant pilgrimage site for Hindus.

The correct answer is option 'B', Brahmaputra.

The Dibang and Lohit rivers are two major tributaries of the Brahmaputra River in India. They are both located in the state of Arunachal Pradesh, which is in the northeastern part of India. Let's explore more about these rivers and their significance.

1. The Brahmaputra River:
- The Brahmaputra is one of the major rivers in Asia and is known as the lifeline of northeastern India.
- It originates from the Angsi Glacier in the Himalayas and flows through Tibet, India, and Bangladesh.
- In India, it enters through the state of Arunachal Pradesh and flows through Assam before entering Bangladesh and eventually merging with the Ganges River.
- The Brahmaputra River is known for its massive volume of water and plays a crucial role in the region's economy and transportation.

2. The Dibang River:
- The Dibang River is the largest tributary of the Brahmaputra River.
- It originates from the northern slopes of the Great Himalayas in Arunachal Pradesh.
- The river flows through the Dibang Valley and eventually joins the Brahmaputra near the town of Sadiya in Assam.
- The Dibang River is known for its scenic beauty and is surrounded by dense forests and snow-clad mountains.

3. The Lohit River:
- The Lohit River is another important tributary of the Brahmaputra River.
- It originates in eastern Tibet and enters India through Arunachal Pradesh.
- The river flows through the Mishmi Hills and joins the Brahmaputra near the town of Tezu in Arunachal Pradesh.
- The Lohit River is known for its turbulent waters and is a popular destination for rafting and adventure sports.

4. Significance:
- The Dibang and Lohit rivers, along with other tributaries, contribute significantly to the water flow of the Brahmaputra River.
- These rivers play a vital role in the irrigation, agriculture, and fisheries of the region.
- The Brahmaputra River and its tributaries are also a source of transportation and are used for both commercial and leisure purposes.
- The rivers and their surrounding areas are ecologically diverse, supporting a wide range of flora and fauna.

In conclusion, the Dibang and Lohit rivers are important tributaries of the Brahmaputra River. They originate in Arunachal Pradesh and contribute to the overall water flow and ecological significance of the region.

About the River Narmada

The River Narmada is one of the most important rivers in India. It rises in the Amarkantak hills in Madhya Pradesh and flows westward for nearly 1,300 km before it empties into the Arabian Sea.

Incorrect Statement

d) Its tributaries are the Tungabhadra and Musi

Explanation

The statement that the tributaries of the River Narmada are the Tungabhadra and Musi is incorrect. The correct tributaries of the River Narmada are:

- The Banjar River
- The Sher River
- The Hiran River
- The Tawa River
- The Ganjal River
- The Kaveri River
- The Burhner River
- The Shakkar River
- The Dudhi River

Therefore, option D is the correct answer to this question.

Saltwater Lake of Rajasthan: Sambhar

Sambhar is the largest saltwater lake in India, located in the state of Rajasthan. It is a part of the Sambhar Lake Town, which is situated around 80 km southwest of Jaipur. The lake is spread over an area of 190 to 230 square kilometers, depending on the water level.

Formation of Sambhar Lake
Sambhar Lake was formed approximately 5,000 years ago when a river named 'Saraswati' changed its course due to tectonic activities. The lake is fed by several small streams and rivers, but it has no outlet. The water in the lake evaporates, leaving behind a high concentration of salt, which is harvested by locals.

Ecology and Wildlife
Sambhar Lake is a significant wetland ecosystem of Rajasthan and is a critical habitat for many migratory birds. It is listed as a Ramsar site, which is a wetland of international importance. The lake is home to a wide variety of birds such as flamingoes, pelicans, storks, and several species of ducks. The lake is also an essential feeding and breeding ground for many resident birds such as Indian cormorants, spoonbills, and painted storks.

Tourism
Sambhar Lake is a popular tourist destination in Rajasthan. The lake is surrounded by hills, and the view of the sunset from the lake is breathtaking. Several resorts and hotels are situated around the lake, which offers a comfortable stay to tourists. The lake is also an excellent spot for bird watching, and many tourists visit the lake to witness the migratory birds during winter.

Conclusion
Sambhar Lake is a unique ecosystem of Rajasthan and has significant ecological and economic importance. It is a must-visit destination for tourists who are interested in bird watching and wish to experience the beauty of nature.

Kolleru Lake is one of the largest freshwater lakes in India located in the state of Andhra Pradesh and forms the largest shallow freshwater[ lake in Asia, 15 kilometers away from the city of Eluru. Kolleru is located between Krishna and Godavari deltas. Kolleru spans into two districts - Krishna and West Godavari. The lake is fed directly by water from the seasonal Budameru and Tammileru streams and is connected to the Krishna and Godavari irrigation systems by over 67 major and minor irrigation canals. This lake is a major tourist attraction.

Indian lakes Differ in size and other characteristics

Nagarjun Sagar Dam Overview
The Nagarjun Sagar Dam is a significant river valley project located on the Krishna River in the Indian states of Andhra Pradesh and Telangana. It plays a crucial role in irrigation, hydroelectric power generation, and water supply.
Key Features of the Nagarjun Sagar Dam
- Location: Situated on the Krishna River, which is one of the major rivers in southern India.
- Construction: Completed in 1967, it was one of the largest masonry dams in the world at the time.
- Purpose: The dam serves multiple purposes including:
- Irrigation for agricultural lands in the surrounding regions.
- Generation of hydroelectric power.
- Water supply for domestic and industrial use.
Importance of the Krishna River
- Major River: The Krishna River is the fourth longest river in India, providing water to several states including Maharashtra, Karnataka, Andhra Pradesh, and Telangana.
- Economic Impact: The river supports millions of livelihoods through agriculture and related activities.
- Cultural Significance: It holds religious and cultural importance, with several temples and festivals associated with it.
Conclusion
The Nagarjun Sagar Dam is integral to the utilization of the Krishna River, making "B" the correct answer. Its construction has transformed the agricultural landscape of the region and provided vital resources for development. Understanding the significance of this dam can provide insights into water management and regional development in India.

Amravati is a tributary of Kaveri.So answer is C

Chilika Lake is a brackish water lagoon, spread over the Puri, Khurda and Ganjam districts of Odisha state on the east coast of India, at the mouth of the Daya River, flowing into the Bay of Bengal, covering an area of over 1,100 km.

Agriculture is the primary source of livelihood for about 58% of India's population. Gross Value Added by agriculture, forestry, and fishing was estimated at Rs. 19.48 lakh crore (US$ 276.37 billion) in FY20.

Definition of Drainage
Drainage refers to the network of rivers, streams, and other water bodies that collect and carry water from a particular area.

Description of the Term Drainage
Option 'B' is the correct answer. It describes the river system of an area. Drainage refers to the collection and transportation of water from a particular area through a network of rivers, streams, and other water bodies. It includes the surface runoff, precipitation, and groundwater. The river system is an integral part of the drainage system as it collects and carries water from the upper areas to the lower areas. The river system comprises of the main river, its tributaries, and distributaries. It is responsible for the formation of river valleys, waterfalls, and gorges, and plays a significant role in shaping the landscape of an area.

Option 'A' is incorrect because it refers to the area drained by a single river system. Drainage is not limited to a single river system, but it includes all the water bodies that collect and carry water from a particular area.

Option 'C' is incorrect because it refers to an upland that separates two drainage basins. Although an upland can separate two drainage basins, it is not the definition of drainage.

Option 'D' is incorrect because one of the options is the correct description of the term drainage.

The Wular Lake is in Jammu and Kashmir

The Wular Lake, also known as Wular Lake, is located in Jammu and Kashmir, India. It is the largest freshwater lake in the region and one of the largest in Asia. Here are some details about the lake and its significance:

Location:
- The Wular Lake is situated in the Bandipora district of Jammu and Kashmir.
- It lies approximately 60 kilometers northwest of Srinagar, the capital city of Jammu and Kashmir.

Description:
- Wular Lake is spread over an area of about 189 square kilometers.
- It is a natural lake formed by the action of the Jhelum River.
- The lake is surrounded by majestic mountains, making it a picturesque location.
- It is fed by several streams and rivers, including the Jhelum River, which flows through it.
- The lake is known for its deep blue waters and lush green surroundings.

Importance:
- The Wular Lake is of great ecological significance as it serves as a habitat for a variety of flora and fauna.
- It supports a rich biodiversity and is home to numerous species of birds, fish, and aquatic plants.
- The lake is a popular destination for birdwatchers and nature enthusiasts, as it attracts a large number of migratory birds during the winter season.
- It also plays a crucial role in regulating the water flow of the Jhelum River and acts as a natural flood control mechanism.

Human Interaction:
- The lake is an important source of livelihood for the local communities living in the region.
- Fishing is a major economic activity, with fishermen relying on the lake for their sustenance.
- The lake also provides irrigation water for agricultural purposes in the surrounding areas.
- However, human activities such as pollution and encroachment have posed significant threats to the lake's ecosystem.

In conclusion, the Wular Lake is located in Jammu and Kashmir, India. It is a significant freshwater lake known for its ecological importance, scenic beauty, and role in supporting local communities.

The largest freshwater lake in India is Wular Lake (also coined as Wullar). It is also one of the largest freshwater lakes in Asia. Wular Lake is located in Bandipora district of Jammu and Kashmir, India. Tectonic activity has formed the lake basin and it is fed by the Jhelum River. The extent of the lake is 100 square miles (30 to 260 square kilometres).

Sambhar Lake Overview
Sambhar Lake is located in the state of Rajasthan, India. It is notable for being a saltwater lake and is an essential part of the region’s ecology and economy.
Geographical Location
- State: Rajasthan
- Significance: It is the largest salt lake in India and is situated near the town of Sambhar, approximately 96 kilometers southwest of Jaipur.
Formation and Characteristics
- Seasonality: The lake is seasonal, meaning it may contain water primarily during the rainy season.
- Salt Production: The water from Sambhar Lake is rich in salt, and it is utilized for salt production, contributing to the local economy.
Environmental Importance
- Biodiversity: Sambhar Lake is home to a variety of bird species, especially migratory birds, making it an important site for bird watching and conservation.
- Inland Drainage: It is part of the inland drainage system and plays a significant role in the hydrology of the semi-arid region of Rajasthan.
Conclusion
In summary, Sambhar Lake is situated in Rajasthan (option D) and holds cultural, economic, and ecological significance. Its unique characteristics, such as being a seasonal saltwater lake, distinguish it from other lakes in India, making it a vital part of the local geography and economy.

Origin place of River Indus
The correct answer is option C: Mansarovar.
Explanation:
The River Indus, one of the longest rivers in Asia, originates from Mansarovar Lake in the Tibetan plateau in China. It flows through Tibet, India, and Pakistan, covering a total length of approximately 3,180 kilometers.
Here are some key points to support this answer:
- Mansarovar Lake: Located at an altitude of 4,590 meters in the Tibetan plateau, Mansarovar Lake is considered sacred by Hindus, Buddhists, and Jains. It is believed to be the source of four major rivers, including the Indus.
- Tibetan Plateau: The Tibetan plateau is a vast elevated region in Central Asia. It is often referred to as the "Roof of the World" and is the source of many major rivers in Asia, including the Indus.
- Indus River: After originating from Mansarovar Lake, the Indus River flows through Tibet before entering India. It then passes through the Ladakh region of Jammu and Kashmir, continues through Pakistan, and finally empties into the Arabian Sea.
Therefore, the correct origin place of the River Indus is Mansarovar, as mentioned in option C.

Introduction to Sundarbans
The Sundarbans delta is a vast mangrove forest located in the delta region of the Padma, Meghna, and Brahmaputra river basins. It is known for its unique ecosystem and rich biodiversity.
Homeland of the Royal Bengal Tiger
- The Sundarbans is famously recognized as the natural habitat of the Royal Bengal Tiger (Panthera tigris tigris).
- This area is crucial for the conservation of this majestic species, which is one of the largest tiger subspecies in the world.
Why the Royal Bengal Tiger Thrives Here
- Unique Ecosystem: The mangrove forests provide a complex habitat where tigers can thrive. The dense vegetation offers excellent cover for hunting and breeding.
- Abundant Prey: The Sundarbans is home to a variety of prey species, including deer, wild boar, and various aquatic animals, which are essential for the tigers' diet.
- Adaptation to Environment: The Royal Bengal Tiger has adapted to the unique challenges of the Sundarbans, including the brackish water and the intricate network of waterways.
Conservation Efforts
- Conservation programs are in place to protect the Royal Bengal Tiger and its habitat, focusing on habitat restoration and community involvement.
- Efforts include anti-poaching measures and awareness campaigns to promote coexistence between local human populations and wildlife.
Conclusion
The Sundarbans delta is undeniably the homeland of the Royal Bengal Tiger, making it a critical area for conservation and biodiversity. Protecting this unique habitat is essential for the survival of this iconic species.

Indus Water Treaty Overview
The Indus Water Treaty is a significant agreement between India and Pakistan, crucial for the management of water resources in the Indus River system.
Signing Date
- The treaty was signed on September 19, 1960.
- The agreement was reached after extensive negotiations facilitated by the World Bank.
Background and Context
- Following the partition of India in 1947, disputes over water resources became a pressing issue, as the Indus River system flows through both countries.
- The treaty was essential to resolve conflicts and ensure equitable water distribution.
Key Features of the Treaty
- The treaty allocates the waters of the Indus River system, which includes the Indus, Jhelum, Chenab, Ravi, Beas, and Sutlej rivers.
- It grants India control over the eastern rivers (Ravi, Beas, and Sutlej) and Pakistan control over the western rivers (Indus, Jhelum, and Chenab).
Significance of the Treaty
- The Indus Water Treaty is considered one of the most successful water-sharing agreements globally.
- It has survived several conflicts between India and Pakistan, showcasing its importance in maintaining peace.
Conclusion
The Indus Water Treaty, signed in 1960, remains a pivotal framework for water management in South Asia, reflecting cooperation despite historical tensions.

The correct answer is 'A', Dendritic. The dendritic drainage pattern resembles the branches of a tree and is characterized by streams that branch out from a central point and flow in different directions. This type of pattern is common in regions with a well-developed network of streams and is often found in areas with relatively flat topography and a uniform rock type.

The Ganga River System
The Ganga River System is one of the most significant river systems in India, known for its vast network of rivers, tributaries, and distributaries.
Formation of Bhagirathi-Hooghly Distributary
- The Ganga River flows through several states in India and ultimately drains into the Bay of Bengal.
- Near the town of Farakka in West Bengal, the Ganga divides into multiple branches, one of which is the Bhagirathi-Hooghly.
- The Bhagirathi-Hooghly is a crucial distributary that serves as the main channel of the Ganga in its lower reaches, providing water to a significant portion of West Bengal.
Importance of the Bhagirathi-Hooghly
- Cultural Significance: The river is revered in Hindu culture and is considered sacred. It plays an essential role in rituals and religious ceremonies.
- Economic Role: The Bhagirathi-Hooghly supports agriculture and fishing, contributing to the livelihoods of many communities along its banks.
- Navigation: This river serves as an important waterway for trade and transport, facilitating the movement of goods and people.
Conclusion
In summary, the Ganga River System is renowned for forming the Bhagirathi-Hooghly distributary, which is pivotal for both ecological balance and human activities in the region. Its significance extends beyond geography, impacting cultural, economic, and social aspects of life in West Bengal.

(i) Natural lakes: (a) Wular (b) Dal (c) Nainital (d) Bhimtal (f) Loktak (g) Barapani (h) Chilka (i) Sambhar (l) Pulicat.

Namcha Barwa and the River

Namcha Barwa is a mountain peak located in the Tibet Autonomous Region of China. It stands at an elevation of 7,757 meters and is part of the eastern Himalayan range. The river mentioned in the question takes a U-turn after reaching Namcha Barwa and enters India through a gorge in Arunachal Pradesh. Let's explore the identity of this river.

Identification of the River

The correct answer to the question is option 'B' - Brahmaputra.

Explanation

The Brahmaputra River is one of the major rivers of Asia, flowing through Tibet, India, and Bangladesh. It originates from the Angsi Glacier in the Himalayas and is known as the Yarlung Tsangpo in Tibet. The river takes a U-turn at Namcha Barwa and enters India through a gorge known as the Namcha Barwa Canyon.

The Namcha Barwa Canyon is a magnificent natural wonder, with towering cliffs and steep gorges. It is one of the deepest and most inaccessible gorges in the world. The river cuts through the eastern Himalayas, forming the boundary between Tibet and Arunachal Pradesh.

After entering India, the Brahmaputra River flows through Arunachal Pradesh, where it is known as the Siang River. It then merges with the Dibang and Lohit rivers to form the mighty Brahmaputra. The river continues its journey through Assam and eventually enters Bangladesh, where it merges with the Ganges River to form the world's largest delta - the Sundarbans.

The Brahmaputra River is of great importance to the region. It supports a diverse ecosystem, providing water, food, and livelihoods to millions of people. The river is also a major transportation route, facilitating trade and commerce.

In conclusion, the river that takes a U-turn at Namcha Barwa and enters India through a gorge in Arunachal Pradesh is the Brahmaputra River. It is a significant river in Asia, playing a vital role in the lives of people in Tibet, India, and Bangladesh.

The Tapi River rises in Betul, Madhya Pradesh

The Tapi River is one of the major rivers in central India. It is also known as the Tapti River and flows through the states of Maharashtra, Madhya Pradesh, and Gujarat. The river has its origin in the Satpura Range in central India and traverses a total length of approximately 724 kilometers before merging with the Arabian Sea.

Origin of the Tapi River
The Tapi River originates from the eastern slopes of the Satpura Range. It rises in the Betul district of Madhya Pradesh, which is located in central India. The specific location where the river originates is a small village called Multai. Multai is situated in the Betul district, which is known for its dense forests, hills, and beautiful landscapes.

Flow and Course of the Tapi River
After its origin in Betul, the Tapi River flows in a westward direction. It then passes through the states of Maharashtra and Gujarat before finally draining into the Arabian Sea. The river traverses through various cities and towns, including Amravati, Akola, Buldhana, Jalgaon, and Surat. Along its course, the Tapi River is joined by several tributaries, including the Purna River and the Girna River.

Importance and Significance of the Tapi River
The Tapi River plays a crucial role in the agricultural, industrial, and ecological aspects of the regions it flows through. It serves as a source of water for irrigation, providing vital resources for agricultural activities. The river also supports the generation of hydroelectric power through the construction of dams and reservoirs.

The Tapi River and its surrounding areas are home to diverse flora and fauna, contributing to the ecological balance of the region. It also serves as a lifeline for several cities and towns, providing a means of transportation and livelihood for the local communities.

In conclusion, the Tapi River rises in Betul, Madhya Pradesh. It originates in the village of Multai and flows through Maharashtra and Gujarat before merging with the Arabian Sea. The river holds significant importance in terms of agriculture, industry, and ecology for the regions it passes through.

Answer:

Introduction:
In this question, we are asked to identify which one of the following lakes is a saltwater lake. The options given are Wular Lake, Sambhar Lake, Barapani Lake, and Dal Lake. To answer this question, we need to understand the characteristics of each lake and determine which one fits the criteria of being a saltwater lake.

Explanation:
To identify the saltwater lake among the given options, let's analyze each lake and its characteristics:

1. Wular Lake:
Wular Lake is located in Jammu and Kashmir, India. It is the largest freshwater lake in India and is surrounded by mountains. As the question specifically asks for a saltwater lake, Wular Lake does not fit this criterion.

2. Sambhar Lake:
Sambhar Lake is located in the state of Rajasthan, India. It is the largest inland saltwater lake in India. The lake is known for its high salt concentration and is a major source of salt production in the region. Therefore, Sambhar Lake fits the criteria of being a saltwater lake.

3. Barapani Lake:
Barapani Lake, also known as Umiam Lake, is located in Meghalaya, India. It is a man-made reservoir and is primarily a freshwater lake. It is used for various recreational activities and water sports. Hence, Barapani Lake is not a saltwater lake.

4. Dal Lake:
Dal Lake is situated in Srinagar, Jammu, and Kashmir, India. It is a famous tourist attraction and is known for its scenic beauty. Dal Lake is a freshwater lake and does not meet the criteria of being a saltwater lake.

Conclusion:
Out of the given options, Sambhar Lake is the only saltwater lake. It is the largest inland saltwater lake in India and is located in Rajasthan. The other options, Wular Lake, Barapani Lake, and Dal Lake, are all freshwater lakes.

Name of Brahmaputra River in Tibet: Tsangpo

- Origin: The Brahmaputra River originates from the Angsi Glacier in the Himalayas in southwestern Tibet.
- Flow through Tibet: In Tibet, the river is known as Tsangpo, which means "purifier" in the Tibetan language.
- Length: The Brahmaputra River is approximately 2,900 kilometers long, with around 1,100 kilometers of its course flowing through Tibet.
- Course in Tibet: The river flows eastwards through southern Tibet, cutting deep gorges and valleys in the Tibetan Plateau.
- Great Bend: After leaving Tibet, the Brahmaputra River takes a dramatic turn known as the Great Bend, where it changes its course and flows southwards through India and Bangladesh.
- Significance: The Brahmaputra River plays a crucial role in the lives of people in Tibet, India, and Bangladesh, providing water for irrigation, transportation, and hydroelectric power generation.
Overall, the Brahmaputra River is called Tsangpo in Tibet and holds great importance for the region.

An oxbow lake forms when a river creates a meander, due to the river's eroding the bank. After a long period of time, the meander becomes very curved, and eventually the neck of the meander becomes narrower and the river cuts through the neck during a flood, cutting off the meander and forming an oxbow lake.

Length of Mahanadi River:
- The given statement states that the length of Mahanadi River is 860 km. Let's analyze the statement to determine its accuracy.
Evaluating the Statement:
- To determine the accuracy of the statement, we need to verify the length of Mahanadi River.
Fact Check:
- The length of Mahanadi River is indeed 860 km.
Conclusion:
- Based on the fact check, the statement is true.
Explanation:
- The Mahanadi River is one of the major rivers in India, flowing through the states of Chhattisgarh and Odisha.
- It originates from the Sihawa Range of hills in Dhamtari district of Chhattisgarh and flows for a length of 860 km before merging into the Bay of Bengal.
- The river is an important water source for irrigation, drinking water, and hydroelectric power generation in the region.
- Therefore, the given statement that the length of Mahanadi River is 860 km is true.

Location of the Source
The river Indus rises in Tibet, near Lake Mansarowar. Lake Mansarowar is a freshwater lake located in the Tibet Autonomous Region of China. The river originates from the northern slopes of the Kailash Mountain range near Mansarowar Lake.

Significance of the Source
The source of the river Indus in Tibet is significant as it marks the beginning of one of the longest rivers in Asia. The Indus River plays a crucial role in the livelihoods of millions of people living in Pakistan and India, as it provides water for irrigation, drinking, and other agricultural activities.

Flow of the River
After rising in Tibet, the river Indus flows through India and Pakistan before emptying into the Arabian Sea. It passes through various regions, including the Himalayas, Punjab, and Sindh, impacting the landscape and communities along its course.

Historical Importance
The river Indus has great historical importance as it was the cradle of the ancient Indus Valley Civilization. The civilization flourished along the banks of the river around 3300-1300 BCE, making it one of the earliest urban civilizations in the world.
In conclusion, the source of the river Indus in Tibet near Lake Mansarowar holds immense geographical, cultural, and historical significance. Understanding the origin of this mighty river helps us appreciate its importance in shaping the landscape and supporting human civilization in the region.

Introduction:
The self-cleansing capacity of a river refers to its ability to purify itself naturally by removing pollutants and maintaining a healthy ecosystem. Various factors can affect this capacity, including aquatic organisms, water withdrawal for irrigation, hydroelectricity generation, and pollution. Among these factors, pollution has the most significant impact on the self-cleansing capacity of a river.

Pollution:
Pollution from various sources such as industrial discharge, agricultural runoff, and domestic sewage can severely degrade the water quality of a river. When pollutants enter the river, they can disrupt the natural balance of the ecosystem and harm aquatic organisms. Pollutants can include harmful chemicals, heavy metals, excess nutrients like nitrogen and phosphorus, and organic matter.

Impact on Aquatic Organisms:
Pollution adversely affects aquatic organisms, which are an essential component of the river ecosystem. Excess nutrients in the water can lead to excessive algae growth, causing oxygen depletion through the process of eutrophication. This oxygen depletion can result in the death of fish and other organisms that rely on oxygen for survival. Additionally, toxic chemicals and heavy metals can accumulate in the tissues of aquatic organisms, leading to health problems and reduced population sizes.

Water Withdrawal for Irrigation:
While water withdrawal for irrigation can impact the overall water availability in a river, it does not directly affect the self-cleansing capacity of the river. However, excessive water withdrawal can lead to reduced flow rates, which can in turn affect the dilution and dispersion of pollutants. This can exacerbate the pollution levels in the river, further hindering its self-cleansing capacity.

Hydroelectricity Generation:
Similar to water withdrawal for irrigation, hydroelectricity generation does not directly affect the self-cleansing capacity of the river. However, the construction of dams for hydroelectricity generation can alter the natural flow patterns of the river and disrupt the habitat of aquatic organisms. This can indirectly impact the self-cleansing capacity by reducing biodiversity and altering ecological processes.

Conclusion:
While factors such as aquatic organisms, water withdrawal for irrigation, and hydroelectricity generation can have indirect impacts on the self-cleansing capacity of a river, pollution is the primary factor that directly affects the river's ability to purify itself. Therefore, the correct answer is 'D' - Pollution. Efforts should be made to reduce pollution and improve water quality to maintain the self-cleansing capacity of rivers and ensure the health of their ecosystems.

Brahmaputra River has a Braided Channel

The Brahmaputra River is a trans-boundary river that flows through China, India, and Bangladesh. It is one of the largest and most important river systems in Asia, and it has a braided channel.

What is a Braided Channel?

A braided channel is a type of river channel that is characterized by multiple channels separated by islands or bars of sediment. These channels often shift and change over time, creating a complex network of waterways that can be difficult to navigate.

Why does the Brahmaputra River have a Braided Channel?

The Brahmaputra River has a braided channel because of its high sediment load and varying flow conditions. During the monsoon season, the river receives a large amount of water and sediment, which causes the river to shift and change its course. This creates multiple channels that weave in and out of each other, creating a braided appearance.

Impact of Braided Channel on the Environment

Braided channels can have a significant impact on the environment. They create a variety of habitats that support a diverse range of plant and animal species. However, they can also be susceptible to erosion and flooding, which can cause damage to nearby communities and infrastructure.

Conclusion

In summary, the Brahmaputra River has a braided channel due to its high sediment load and varying flow conditions. While this creates a unique environment that supports a range of species, it can also be a challenge for nearby communities and infrastructure.

The Narmada, Periyar and Tapti are the only long rivers, which flow west and make estuaries. An Estuary is a partly enclosed coastal body of water with one or more rivers or streams flowing into it, and with a free connection to the open sea. Only West following rivers of India forms Estuary.

Introduction to Dakshin Ganga
The term 'Dakshin Ganga' translates to 'Southern Ganges', and it is primarily used to refer to the Godavari River in India. This designation highlights the river’s significance in the southern part of the country, akin to the Ganges in the north.
Importance of the Godavari River
- Second Longest River: The Godavari is the second longest river in India, flowing over 1,465 kilometers. It originates in the Western Ghats of Maharashtra and flows eastward into the Bay of Bengal.
- Major Water Source: This river is crucial for irrigation, drinking water, and various other needs of the states it traverses, including Maharashtra, Telangana, Andhra Pradesh, and Chhattisgarh.
- Cultural Significance: The Godavari holds immense religious importance. Pilgrimages to its banks are common, especially during the Pushkaralu festival, where devotees take holy dips.
Comparison with Other Rivers
- Narmada: Known for its rift valley, it flows through central India but does not hold the same extensive cultural impact in the south.
- Krishna: While also significant, it is not referred to as 'Dakshin Ganga' and has a different geographical and cultural context.
- Kaveri: Another important river in southern India, but it does not match the scale or influence of the Godavari in terms of its nickname.
Conclusion
In summary, the Godavari is aptly named 'Dakshin Ganga' due to its extensive reach, cultural importance, and vital role in the lives of millions in southern India, solidifying its status as one of the country's prominent rivers.

The Flow of Major Rivers in Peninsular India
The statement about the flow of major rivers in Peninsular India indicates that these rivers predominantly move towards the east. Here’s a detailed explanation:
Geographical Context
- The Western Ghats serve as a significant water divide in Peninsular India. This mountain range runs from north to south along the western coast of the peninsula.
- The rivers originating from the Western Ghats generally have their courses directed towards the east.
Major Rivers Flowing Eastwards
- Key rivers such as the Mahanadi, Godavari, Krishna, and Kaveri discharge their waters into the Bay of Bengal.
- These rivers have carved out deltas at their mouths, a characteristic feature of rivers flowing into larger bodies of water.
Western Flowing Rivers
- In contrast, the Narmada and Tapi are notable exceptions as they flow towards the west.
- These rivers create estuaries as they empty into the Arabian Sea, but they are not classified as major rivers in terms of volume compared to those flowing eastward.
Conclusion
The eastward flow of the major rivers in the Peninsular region is a result of the topographical features influenced by the Western Ghats. Thus, the correct answer to the question about the flow direction of the major rivers is indeed Eastwards (option C). This understanding of river systems is crucial for geographical studies and water resource management in India.

Commercial salt is manufactured from rock salt, as well as from seawater and other natural and artificial brines. Most of the artificial brines are obtained by pumping water into underground salt beds. A considerable amount of brine itself is used directly in industrial countries.

Ladakh, 'the Land of High Passes', is a beautiful region in India. Snowcapped peaks, clear blue skies, barren mountains with meandering rivers, Ladakh is picturesque! It's not only known for its scenic beauty but also for some of the most difficult treks. Bike lovers enjoy this trail of rugged mountains.