Step 1: Understanding the Concept:
The question asks to identify the option that is not a traditional or ancient method of water harvesting, particularly in the context of India.
Step 2: Detailed Explanation:
\[\begin{array}{rl} \bullet & \text{Katta: These are traditional temporary check dams built across streams and rivers, commonly found in parts of Karnataka. This is an ancient method.} \\ \bullet & \text{Kulh: These are traditional surface water channels used for irrigation in hilly regions, especially in Himachal Pradesh. This is an ancient method.} \\ \bullet & \text{Dug well: Digging wells to access groundwater is one of the oldest methods of water sourcing known to humanity.} \\ \bullet & \text{Irish: This term is not associated with any known ancient water harvesting method in India. While there are methods like an "Irish drain" (a type of French drain), these are modern drainage techniques, not ancient harvesting systems.} \\ \end{array}\]
Step 3: Final Answer:
Katta, Kulh, and Dug well are all ancient methods of water management. "Irish" is not recognized as one of them.