CMB

   9th CBSE Social Notes On Drainage   03-November-2021   Notes 01 .  D rainage :    It describes the river  system of an area 02 .  D rainage basin  : The area drained by a single river  system is called Drainage basin eg: Ganga River Basin 03 .  W hich is the largest river basin in the world and In India ? Ans : Amazon River basin in the world and Ganga River Basin India. 04 .  W aterDivide :    An  elevated area,  such as a mountain or an upland, separates two drainage basins  is known as a water divide. Eg: Ambala water divide separates Indus and Ganga in Haryana 05 .  H ow do the Indian drainage system is classified ? Ans : The Indian Drainage system is classified based on its origin, It is broadly divided into  two categories: • T he Himalayan rivers; and • Th e Peninsular rivers. 06 .  W hat are the  physiographic  units are involved in the evolution of Indian Drainage river basin ?   Ans :  The drainage system in India has evolved and adjusted itself with the evolution of the t