Which of the following is not a traditional method of irrigation?

Irrigation is the process of supplying water to land artificially to grow crops and maintain landscapes like a garden, orchards, etc.
A traditional irrigation system is usually cheap and requires manual labour to draw natural water from sources such as rivers, streams, lakes, and wells. Water is typically channeled into fields via ditches, canals, or furrows for irrigating crops. 

Moat, dhekli, and rahat are some of the traditional methods of irrigation.

Modern methods of irrigation include surface irrigation, drip irrigation, sprinkler irrigation, and subsurface irrigation.