May one open channels to irrigate a field on Chol Hamoed, or only if the intent is to catch fish?

HolidaysChol HamoedPermitted Labor

Synopsis

It is forbidden to open channels specifically for irrigating a field. However, if one opens channels to trap fish for eating on the holiday (using inlet and outlet mechanisms), it is permitted even though the field may incidentally benefit.

Early Acharonim
Lenient
Strict
Lesser cited
Major authority

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