Ans. A gorge is a narrow valley with steep, rocky walls located between hills or mountains.
Ans. Ambala is located on the water divide between the Indus and the Ganga river systems.
Ans. The drainage systems of India are mainly controlled by the broad relief features of the subcontinent.
Ans. The Wular lake, The Dal lake, Bhimtal, Nainital, Loktak and Barapani are some important fresh water lakes.
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.
Ans. The Narmada and the Tapi are the only long rivers, which flow west and make esturies.
Ans. Tributaries of Godavari river are the Purna, the Wardha, the Pranhita, the Manjra, the Wainganga and the Penganga.
Ans. The major tributaries of river Ganga are the Yamuna, the Ghaghara, the Gandak and the Kosi.
Ans. Rivers that flow throughout the year are known as perennial rivers. Example: Ganga river.
Ans. The Ganga flows eastwards till Farakka in West Bengal. This is the northernmost point of the Ganga delta.
Ans. The Brahmaputra rises in Tibet east of Mansarowar lake very close to the sources of the Indus and the Satluj.
Ans. Several tributaries, the Zaskar, the Nubra, the Shyok and the Hunza, join it in the Kashmir region.
Ans. The Satluj, the Beas, the Ravi, the Chenab and the Jhelum are the main tributaries of river Indus.
Ans. The term drainage describes the river system of an area. The area drained by a single river system is called a drainage basin.
Ans. The two headstreams of the Ganga are Bhagirathi and Alaknanda. They both meet to form the Ganga at Devaprayag in Uttarakhand.
Ans. The Satluj, the Beas, the Ravi, the Chenab and the Jhelum join together to enter the Indus near Mithankot in Pakistan.
Ans. The Indian rivers are divided into:
i. The Himalayan rivers; and
ii. The Peninsular rivers
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.
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.
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