West of Indus plain and out 9f monsoon zone is Baluchistan which receives very low rainfall annually. But innumerable natural springs known as karez are found in most of the areas. The ancient karez system is comprised of a series of wells and linking underground channels that uses gravity to bring ground water to the surface usually far from the source. The people ingeniously created the karez to draw the under ground water to irrigate the farmland...
Drip irrigation;
It is also known as trickle irrigation or micro irrigation. It is an irrigation method that saves water and fertilizer by allowing water to drip slowly to the roots of plants either on to the soil surface or directly onto the root zone through a network of valves pipes tubing and emitters. It is done through narrow tubes that deliver water directly to the base of the plant. Sprinkles that spray in a fixed pattern are generally called sprays heads. Sparys are not usually designed to operate at pressure above 30psi pounds per square inch due to maintained problems that may developed
Higher pressure sprinklers that themselves move in a circle are driven by a ball drive gear drive or impact mechanism impact sprinklers. These can be designed to rotate in full or partial circles...!!!
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