A letter to Municipal Commissioner about the dirt and filth lying around lying around your colony

 

Drainage – One Liner Facts for Exam

NCERT Geography Class 9 Chapter 3

• Drainage means the river system of an area.

• A river along with its tributaries forms a drainage basin.

• A water divide separates two drainage basins.

• The Ambala region is the water divide between the Indus and Ganga river systems.

• India’s drainage system is divided into Himalayan and Peninsular rivers.

• Himalayan rivers are perennial rivers.

• Peninsular rivers are seasonal rivers.

• Indus River originates near Lake Mansarovar in Tibet.

• The major tributaries of the Indus are Jhelum, Chenab, Ravi, Beas, and Sutlej.

• Ganga originates from the Gangotri Glacier.

• Bhagirathi and Alaknanda meet at Devprayag to form the Ganga.

• Yamuna is the main right-bank tributary of the Ganga.

• Ghaghara, Gandak, and Kosi are left-bank tributaries of the Ganga.

• Brahmaputra River is called Tsangpo in Tibet.

• Brahmaputra enters India through Arunachal Pradesh.

• The Ganga-Brahmaputra delta is the largest delta in the world.

• Himalayan rivers form broad flood plains.

• Narmada River rises from the Amarkantak Hills.

• Narmada River flows westward into the Arabian Sea.

• Tapti River also flows westward.

• Godavari River is called the “Dakshin Ganga”.

• Godavari River is the longest Peninsular river.

• Krishna River originates near Mahabaleshwar.

• Kaveri River rises in the Western Ghats.

• Most Peninsular rivers flow into the Bay of Bengal.

• Peninsular rivers flow over hard rock surfaces.

• Wular Lake is the largest freshwater lake in India.

• Sambhar Lake is a saltwater lake.

• Chilika Lake is located in Odisha.

• Rivers help in irrigation and hydroelectric power generation.

• River pollution is caused by industrial waste and sewage.

• Rivers provide fertile soil for agriculture.

• Lakes help in flood control and water storage.

• Dendritic drainage pattern resembles the branches of a tree.

• Radial drainage pattern flows outward from a central hill or mountain.

• Meanders are bends in the course of a river.

• A delta is formed by deposition at the mouth of a river.

• Sundarbans is a famous delta region in India.