Last Updated
：2026/01/07
反砂堆
Hiragana
はんさてい
Noun
Japanese Meaning
水理学・地形学において、流れの速い開水路などで、水面波と連動して川底や砂床に形成される波状の砂堆の一種で、通常の砂堆とは流れ方向に対する波の位相が逆転したもの。水面の波と同位相（同じ位置関係）で発達し、流れ条件が変化すると移動・消失する不安定な微地形を指す。
Easy Japanese Meaning
川のそこにできる小さな山のようなすなもりが、水のながれとぎゃくむきにのびたもの
Chinese (Simplified) Meaning
河流地貌中的床形，在高流态形成，与水面波同相，常向上游迁移 / 高能水流下形成的水下波状沙堆（反向沙丘）
Chinese (Traditional) Meaning
在超臨界流下形成、與水面波同相並可向上游遷移的河床沙堆床形 / 形成於高流速、淺水環境、與一般沙丘相反的水下沙堆
Korean Meaning
초임계 흐름에서 형성되어 상류 방향으로 이동하는 하상 사구 / 수면 파동과 위상이 같은 상향 이동성 하상 지형
Vietnamese Meaning
đụn cát ngược (antidune) / dạng sóng đáy ngược dòng hình thành dưới dòng chảy mạnh / gờ trầm tích đáy di chuyển ngược chiều dòng
Tagalog Meaning
bunton ng sediment sa ilalim ng ilog na nabubuo sa napakabilis na daloy ng tubig / anyo ng sahig ng ilog na karaniwang gumagalaw paitaas ng agos at kasabay ng alon sa ibabaw
Sense（1）
(geomorphology) antidune
（ canonical ）
（ romanization ）
（ hiragana ）
Quizzes for review
See correct answer
反砂堆
See correct answer
In geomorphology, an antidune is a special type of sand dune that forms on the downstream side of a water flow.
In geomorphology, an antidune is a special type of sand dune that forms on the downstream side of a water flow.
See correct answer
地形学では、反砂堆は水流の下流側に形成される特殊な砂丘の一種です。
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