One of the following two methods is generally used for the estimation of irrigation requirement: 1. Method Based on 'Duty of Water': In this method, the designer has to first decide the duty of water for different crops in the command area of the system. Duty of water (or simply duty) for a given crop is defined as the area [...]
This article provides a paragraph on well irrigation. The amount of water stored in the earth's crust is estimated to be around 8 billion cubic kilometres, half of which is at depths less than 800 metres. This volume of water is about 35 times the combined storage of all the world's rivers, fresh water lakes, reservoirs and inland seas. Ground [...]
After reading this article you will learn about the open wells and tube wells with the help of a diagram. Water wells can be classified either open wells or tube wells. Open wells have relatively large diameter (generally 1 to 5 m) and low yields (generally less than 30 m3/hr), and are not very deep (generally 3 to 15 m). [...]