Question

The most important source of irrigation in karnataka is:
A) Canals
B) Wells
C) Tanks
D) Tubewells

Answer 1

Hint: As a supplement to rain water, irrigation refers to the supply of water to dry land. It is primarily oriented towards cultivation. There are different forms of irrigation systems in various parts of India

Complete answer:
In India, there are three major irrigation sources. They are (a) ducts, (b) wells and tube-wells, and (c) reservoirs. The primary source of irrigation is the Wells and Tubewells. Canals are in second place, while tanks are in third. In the Great Plains and in the Mahanadi, Godavari, Krishna deltas in the eastern coastal plains, canal irrigation has its highest evolution.

A) Canals: While canal irrigation was only implemented on a large scale during the last century, it has already become the country's main source of irrigation because of its inexpensiveness and the ease and certainly the availability of water. Northern India's irrigation canals rank among the world's greatest and most beneficent triumphs of modern engineering. This is not the correct answer, Hence Option A. is an incorrect option.

B) Wells: Wells are found mostly in the U.P. ,Bihar, Tamil Nadu, etc. There are different types of wells: shallow wells, deep wells, tube wells, artesian wells, etc. Water is not often accessible from the shallow wells as the water level goes down during the dry months. For the purpose of irrigation, deep wells are more fitting as water from them is accessible throughout the year. This is the correct answer.

C) Tanks: Water-reservoirs are made in the Deccan by building dams. In the states of Tamil Nadu, Andhra Pradesh, and Karnataka, etc., this method is widely adopted. In Northern India, tanks are also designed to store water. Water is transported by canals from all these reservoirs to the fields. This is not the correct answer, Hence Option C. is an incorrect option.
D) Tubewells: For irrigation purposes, tube-wells are also used. A tube-well can be built close to the agricultural area at locations where groundwater is available. A deep tube, well-operated by electricity, can irrigate a far greater area than a surface well ($\dfrac{1}{2}$ hectares) (about 400 hectares). In the U.P., Haryana, Punjab, Bihar and Gujarat, tube wells are mostly used. Artesian wells in Rajasthan and Maharashtra now provide agricultural land with water. In Artesian wells, due to the normal flow of water due to high pressure, the water level stays at a high level. This is not the correct answer, Hence Option D. is an incorrect option.

Hence, the correct answer is option (B).

Note: KARNATAKA-THE FORTUNATE STATE With seven river basins, Karnataka is blessed. The state has 36,753 tanks and they have a total of approximately 684518 hectares. The rivers account for most of the surface water supplies of Karnataka, along with their tributaries.