9th NCERT Geography - Contemporary India I
Lesson 3, DRAINAGE
Additional CBSE Guess and Guide Questions with Answers
Question.1: Which is the largest tributary of the Ganga?
Answer: The Yamuna is the
largest and main tributary of the River Ganga.
Question.2: Which is the main watershed in Peninsular India?
Answer: The main watershed
in Peninsular India is formed by the Western Ghats.
Question.3: Define: (a) Oxbow lake, (b) Drainage, (c) Distributary,
(d) Meandering and Meanders, (e) Delta, (f) Estuary, (g) Lake, (h) River.
Answer:
(a) Oxbow Lake - Due to
continuous erosion and deposition along the sides of the meanders, the end of
meander loop come closer and closer. In due course of time the meander loops
cut off from the river and forms a cut off lake also known as ‘Oxbow Lake’.
(b) Drainage - It can be defined
as a system of flowing water from the higher level to the lower level. However,
the term drainage is widely used to describe the river system of an area.
(c) Distributary - A channel
which branches of from the main river and carries away a part of its water.
(d) Meandering and Meanders - The
phenomenon of bending (winding) of a river in its lower course into small
U-shaped loops is called as ‘Meandering’. Winding sections or loops of a river
that swing from side-to-side as it flows over a level tract normally along its
lower course are known as ‘Meanders’.
(e) Delta - A more or less
triangular and level tract of alluvium formed at the mouth of a river entering
a relatively quite body of a river. e.g. Sunderban delta.
(f) Estuary - It is the tidal
mouth of a river where sweet and salty waters mix together. Estuaries are
biologically one of the most productive zones in the world.
(g) Lake - a deep and vast
depression on the surface of the earth filled with water.
(h) River - Rivers may be defined
as natural streams of flowing water from a mountain, lake, spring etc. to the
sea, lake or another water body.
Question.4: Which river streams constitute the Northern Plains?
Answer: The Indus in the
west and the Ganga-Brahmaputra in the east are the river streams which
constitute the Northern Plains.
Question.5:
What is the name of the important river found in the Indian desert?
Answer: Luni.
Question.6: With which river Nagarjuna Sagar river valley
project is associated?
Answer: Krishna River.
Question.7: Which river originates from a place known as Beas
Kund?
Answer: Beas (Also known as
Vipasha).
Question.8:
Which river is known as the “sorrow” of west Bengal?
Answer: Damodar River.
Question.9: Name the river(s) on which the Indira Gandhi canal
has been built.
Answer: Beas and Sutlej.
Question.10: Which river flows through Ladakh, Gilgit and
Pakistan?
Answer: Indus River.
Question.11:
Name the river whose source lies near Rohtang Pass.
Answer: Beas.
Question.12: Name the states through which river Mahanadi flows.
Answer: River Mahanadi
flows through MP, Chhattisgarh and Orissa before falling into the Bay of
Bengal.
Question.13:
Name the longest westward flowing river of Peninsular India.
Answer: Narmada.
Question.14: What do you mean by ‘inland drainage’?
Answer: When waters of a
river do not reach the oceans but fall into an inland sea or lake, such a
drainage is called as ‘inland drainage’. Most of the rivers of Rajasthan are
governed by inland drainage.
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