What is the working principle of Center Pivot irrigation?

Center-pivot irrigation (sometimes called central pivot irrigation), also called waterwheel and circle irrigation, Center-pivot irrigation sprinkler is a method of crop irrigation in which equipment rotates around a pivot and crops are watered with sprinklers.  A circular area centered on the pivot is irrigated, often creating a circular pattern in crops when viewed from above (sometimes referred to as crop circles). Most center pivots were initially water-powered, and today most are propelled by electric motors.
Center Pivot irrigation has been proven to be the most cost-effective irrigation system in the industry.Good performance on wather spray uniformance on wather spray uniformity, high efficiency and labor saving. Helping to overcome runoff,while increasing yield and save water. From the pivot point to the overhang, our center pivots are engineered, constructed, and field-tested to outperform any other equipment in your field.