Drainage

Q17. What is a gorge?

Ans. A gorge is a narrow valley with steep, rocky walls located between hills or mountains.

Q18. Which city is located on the water divide between the Indus and the Ganga river systems?
Or
Which place is located on the water divide between the Indus and the Ganga river systems?

Ans. Ambala is located on the water divide between the Indus and the Ganga river systems.

Q19. What controls the drainage system of India?
Or
How are drainage systems of India mainly controlled?

Ans. The drainage systems of India are mainly controlled by the broad relief features of the  subcontinent.

Q20. Name some fresh water lakes of India.

Ans. The Wular lake, The Dal lake, Bhimtal, Nainital, Loktak and Barapani are some important fresh water lakes.

Q21. Name the main water divide in Peninsular India.

Ans. The main water divide in Peninsular India is formed by the Western Ghats, which runs from north to south close to the western coast.

Q22. Name the two west flowing peninsular rivers which make estuaries.

Ans. The Narmada and the Tapi are the only long rivers, which flow west and make esturies.

Q23. Name the tributaries of Godavari river.

Ans. Tributaries of Godavari river are the Purna, the Wardha, the Pranhita, the Manjra, the Wainganga and the Penganga.

Q24. Write the major tributaries of river Ganga.

Ans. The major tributaries of river Ganga are the Yamuna, the Ghaghara, the Gandak and the Kosi.

Q25. What are perennial rivers?

Ans. Rivers that flow throughout the year are known as perennial rivers. Example: Ganga river.

Q26. Which is the northernmost point of Ganga Delta?

Ans. The Ganga flows eastwards till Farakka in West Bengal. This is the northernmost point of the Ganga delta.

 
Q27. Where did the Brahmaputra River originate?

Ans. The Brahmaputra rises in Tibet east of Mansarowar lake very close to the sources of the Indus and the Satluj.

 
Q28. Name the tributaries that join the river Indus in the Kashmir.

Ans. Several tributaries, the Zaskar, the Nubra, the Shyok and the Hunza, join it in the Kashmir region.

Q29. What are the main tributaries of river Indus?

Ans. The Satluj, the Beas, the Ravi, the Chenab and the Jhelum are the main tributaries of river Indus.

Q30. What is drainage and drainage basin?

Ans. The term drainage describes the river system of an area. The area drained by a single river system is called a drainage basin.

Q31. Name the two headstreams of the Ganga. Where do they meet to form the Ganga?

Ans. The two headstreams of the Ganga are Bhagirathi and Alaknanda. They both meet to form the Ganga at Devaprayag in Uttarakhand.

Q32. At which place do the Satluj, Beas, Ravi, Chenab and the Jhelum rivers join together to enter the Indus?

Ans. The Satluj, the Beas, the Ravi, the Chenab and the Jhelum join together to enter the Indus near Mithankot in Pakistan.

Q33. In which two major groups Indian rivers are divided into?

Ans. The Indian rivers are divided into:

                         i.        The Himalayan rivers; and

                       ii.        The Peninsular rivers

Q34. Which type of drainage pattern is formed by Narmada river?
Or
Identify the drainage pattern of river Narmada.

Ans. All the tributaries of the Narmada are very short and most of these join the main stream at right angles. A river joined by its tributaries, at approximately right angles, develops a trellis pattern.

Q35. What is the similarity between river Damodar and Kosi?
Or
What is the common between river Damodar and Kosi?

Ans. Both the rivers i.e. River Damodar in West Bengal and River Kosi in Bihar are called River of sorrow because they cause floods which leads to loss of lives and property.