Drainage quiz

The Bhagirathi and Alaknanda meet at:

Which river flows through a rift valley?

The largest Peninsular river is the:

Which lake is a salt water lake in Rajasthan?

The river known as the sorrow of Bihar is the:

Majuli, a large river island, is on the:

Chilika lake is a:

The Indus rises in:

A drainage pattern in which streams radiate from a central peak is:

The Kaveri forms a famous waterfall at:

Name the five tributaries of the Indus that flow through India. (2 marks)

Why does the Brahmaputra carry less silt in Tibet but more in India? (2 marks)

Name two west-flowing Peninsular rivers. Why do they not form deltas? (2 marks)

What is the Sundarban delta? Why is it named so? (2 marks)

Why is the Godavari called the Dakshin Ganga? (2 marks)

Name two tributaries of the Ganga that rise in the Peninsular plateau. (2 marks)

How are lakes useful to humans? (2 marks)

Which is the largest freshwater lake in India? Where is it? (2 marks)

Why are rivers important for the economy? (2 marks)

Name two causes of river pollution. (2 marks)

The Kosi changes its course often. If it shifted 120 km westward over 200 years, find the average shift per year in metres. (3 marks)

The Ganga basin covers about 8.6 lakh square km in India, about 26% of India's area. Estimate India's total area. (3 marks)

A dam reservoir holds 9,000 million cubic m of water. If 60% is used for irrigation, 25% for drinking water and the rest for industry, find the volume for each use. (3 marks)

A river carries 500 tonnes of silt a day past a point. How much silt does it carry in a year? If a dam traps 70% of it, how much passes downstream? (3 marks)

Arrange these rivers from north to south along the east coast: Godavari, Kaveri, Mahanadi, Krishna. If the distance between the mouths of the Mahanadi and Kaveri is about 1,300 km, what is the average distance between the mouths of the four rivers if they were evenly spaced? (3 marks)

Read the passage and answer the questions. The Ganga is joined by many tributaries from the Himalayas, such as the Yamuna, Ghaghara, Gandak and Kosi, which carry large amounts of water and silt. In the plains, it forms meanders and oxbow lakes. (i) Why do Himalayan tributaries carry more silt? (ii) How are oxbow lakes formed? (iii) Why are the Ganga plains fertile? (5 marks)

Read the passage and answer the questions. The Narmada rises in the Amarkantak hills and flows west through a rift valley between the Vindhya and Satpura ranges, forming the Marble Rocks and the Dhuandhar falls near Jabalpur. (i) Into which water body does it drain? (ii) Why does it form an estuary and not a delta? (iii) Name another river flowing through a rift valley. (5 marks)

Read the passage and answer the questions. In Bihar, the Kosi floods regularly, destroying crops and homes and forcing people to move. (i) Why is the Kosi called the sorrow of Bihar? (ii) What causes its floods? (iii) Suggest two measures to reduce flood damage. (5 marks)

Read the passage and answer the questions. The Namami Gange programme aims to clean the Ganga by building sewage treatment plants, cleaning river surfaces, developing riverfronts and promoting afforestation along the banks. (i) Why is the Ganga polluted? (ii) Name two steps under the programme. (iii) How can citizens help? (5 marks)

Read the passage and answer the questions. The Brahmaputra rises in Tibet, where it is called the Tsang Po. It enters India in Arunachal Pradesh as the Dihang and flows through Assam before entering Bangladesh. (i) Why does it carry less water in Tibet? (ii) Why does it cause floods in Assam? (iii) Name the river island formed by it. (5 marks)

On an outline map of India, mark the Himalayan rivers and their main tributaries. Explain the features of the Indus river system. (6 marks)

On an outline map of India, mark the Peninsular rivers. Explain why most of them flow east. (6 marks)

Draw a labelled diagram showing the formation of meanders and an oxbow lake. Explain the process. (6 marks)

Draw a labelled diagram of a delta and an estuary. Explain the difference with examples from India. (6 marks)

Draw a flowchart showing the causes, effects and remedies of river pollution. Explain with examples. (6 marks)