The network of channels through which water flows is known as a ___ system.

Drainage

True or False: A drainage basin is the area drained by a river and its tributaries.

True

Watersheds are generally ___ in area compared to river basins.

Smaller

What separates the Arabian Sea drainage from the Bay of Bengal drainage in India?

Delhi ridge, the Aravalis, and the Sahyadris

Fill in the blank: Nearly ___ percent of the drainage area in India is oriented towards the Bay of Bengal.

77

True or False: The Indus River system discharges its water into the Bay of Bengal.

False. The Indus River system discharges its water into the Arabian Sea.

How are Indian drainage systems categorized based on water discharge orientation?

They are categorized into the Arabian Sea drainage and the Bay of Bengal drainage.

Major river basins in India have a catchment area of more than ___ sq. km.

20,000 sq. km.

True or False: The Narmada and Tapi rivers discharge their waters into the Bay of Bengal.

False. They discharge their waters into the Arabian Sea.

Fill in the blank: Minor river basins in India have a catchment area of less than ___ sq. km.

2,000 sq. km.

What are the two classifications of Indian drainage based on origin and characteristics?

Himalayan drainage and peninsular drainage.

True or False: The Chambal and Betwa rivers are considered part of Himalayan drainage.

False. They are older in age and origin than many rivers in the Himalayan drainage.

Fill in the blank: The medium river basins in India have a catchment area between ___ and ___ sq. km.

2,000 and 20,000 sq. km.

How many major river basins are there in India?

14 major river basins.

The drainage pattern resembling the branches of a tree is known as ___ and is exemplified by the rivers of the northern plain.

Dendritic

True or False: The Himalayan drainage system is characterized by rivers that are only seasonal and not perennial.

False. The Himalayan drainage system includes perennial rivers fed by melting snow and precipitation.

What are the primary features formed by rivers as they transition from the Himalayan region to the plains?

The rivers form depositional features such as flat valleys, ox-bow lakes, flood plains, braided channels, and deltas near their mouths.

Rivers originating from the Amarkantak range illustrate which type of drainage pattern?

Radial drainage pattern, where rivers flow in all directions from a central point.

Fill in the blank: The Kosi River is often referred to as the ‘___ of Bihar’ due to its tendency to change its course frequently.

Sorrow

True or False: The rivers of the Himalayan drainage system pass through deep gorges and form rapids and waterfalls.

True

What type of drainage pattern is characterized by primary tributaries flowing parallel to each other with secondary tributaries joining at right angles?

Trellis drainage pattern.

The Indo-Brahma river was thought to have traversed the entire Himalayan region during what geological period?

Miocene period, approximately 5-24 million years ago.

True or False: The dismemberment of the Indo-Brahma river into separate drainage systems occurred primarily during the Holocene period.

False. The dismemberment occurred due to the Pleistocene upheaval.

Fill in the blank: The three main drainage systems that emerged from the Indo-Brahma river are the Indus, Ganga, and ___ river systems.

Brahmaputra

What geological feature acted as the water divide between the Indus and Ganga drainage systems?

The uplift of the Potwar Plateau (Delhi Ridge).