CBSE Questions for Class 9 Geography Drainage Quiz 4 - MCQExams.com

The Gadsisar Lake is one of the most famous tourist places in Jaisalmer which was built by Raja Rawal Jaisal, the first ruler of Jaisalmer. In the later years Maharaja Garisisar Singh rebuilt and revamped the lake. This historic lake is located towards the south of Jaisalmer city. The bank of the Gadsisar lake is surrounded by artistically carved Chattris, Temples, Shrines, and Ghats. Its charm lies in the fact that it was the only source of water for the Jaisalmer city in the olden days.

• The Kaveri River rises in the Western Ghats and flows in eastward direction passing through the states of Karnataka, Tamil Nadu, Kerala and Pondicherry before it drains into Bay of Bengal.
  
• It is bounded on the west by the Western Ghats, on the east and south by the Eastern Ghats and on the north by the ridges separating it from the Tungabhadra (Krishna) and Pennar basins.
• The total length of the river from source to its outfall into Bay of Bengal is about 800 km. Of this, 320 km is in Karnataka, 416 km is in Tamil Nadu and 64 km in Kerala and forms the common boundary between Karnataka and Tamil
  Nadu States.
• The Kaveri basin extends over an area of 81,155 km, which is nearly 24.7% of the total geographical area of the country.

• The Brahmaputra rises in Tibet east of Mansarowar lake very close to the sources of the Indus and the Satluj. It is slightly longer than the Indus, and most of its course lies outside India. 
• It flows eastwards parallel to the Himalayas. On reaching the Namcha Barwa (7757 m), it takes a ‘U’ turn and enters India in Arunachal Pradesh through a gorge. 
• Here, it is called the Dihang and it is joined by the Dibang, the Lohit, and many other tributaries to form the Brahmaputra in Assam.

• Doab is a term used in India and Pakistan for the "tongue," or tract of land lying between two converging or confluent rivers.
  
• R. S. McGregor defines it as "a region lying between and reaching to the confluence of two rivers."
  

In the geomorphology terms, drainage systems are also known as river systems. These are the patterns formed by the streams, rivers, and lakes in the drainage basin. They are governed by the topography of the land, whether a particular region is dominated by hard or soft rocks and the gradient of the land. The elevated area as a mountain, which separates two drainage basins is known as water divide. In the drainage basin area, precipitation collects and further drains off into a common outlet. It is a completely natural water system in a drainage basin.

Above information clears the facts the way in which tributaries and rivers branch off in different directions is known as drainage pattern. So the correct option is D.

Though there may rivers in India, the most important of them is the Ganga River. The length of Ganga river is 2,525 km. It rises in western Himalayas in Uttarakhand, flows up to Bangladesh and then empties into Bay of Bengal.