also: りくこう
noun
land lock; floodwall gate
Technical term for a gate in a floodwall or levee that allows passage when closed, used in flood control and coastal protection.
この地域の陸閘は、高潮の際に閉められる。
The land lock in this area is closed during storm surges.
陸閘の操作には訓練が必要だ。
Operating the floodwall gate requires training.
水門 is a general term for a water gate or sluice, while 陸閘 specifically refers to a gate in a floodwall or levee for land access.
Compound of 陸 (land) and 閘 (lock/gate). The reading りっこう is a common on'yomi combination; りくこう is an alternative reading.