NCERT Important Questions Class 10 Social Science Geography Chapter 3
Important NCERT Extra Questions
Chapter 3 Water Resources
NCERT Book Extra Questions for Session 2022-2023
CBSE Board and UP Board Others state Board
What is a dam? Describe the classification of dams on the basis of their structure and materials used and height.
(a) A dam is a barrier across flowing water that obstructs, directs’ or retards that flow, often creating a reservoir, lake or impoundment. It has a section called a spillway or weir over which or through which water flows intermittently or continuously.
(b) (i) Based on structure and the materials used., dams are classified as timber dam, embankment dams or masonry dams.
(ii) According to height, dams can be categorised as large dams and major dams or alternatively as low dams, medium height dams and high dams.