沙丘湖是因風而形成起伏的沙灘。、河流流入窪地時自然形成的淡水沼澤（佐形縣、新潟縣等）。由於洋流和波浪，水下的沙子像堤壩一樣膨脹，堵塞了出口。、（與佐呂間湖、八郎形等鹹水湖的形成方式不同）。沙丘湖本身是一個正在世界各地消失的寶貴實體。、創造具有生物價值的環境。
Sand dune lake is a natural freshwater pond in a sandhill. It was shaped by wind. The wind had been carring sand and formed ups and downs, and then water stream into hollow places. It is not only very valuable existence itself in the world but also it gives important environment for biodeversity that’s being lost.
位於東通村、有許多大大小小的「沙丘湖」（光是命名沼澤就有13個）。東通村、猿森沙丘、背濕地被選為日本500處重要濕地之一（事實上，可以說下北半島的大部分地區都是這樣入選的）。。此猴嘎森林沙丘（寬1-2公里）、「下北沙丘」是沙丘（全長17公里）和稍微向內陸延伸的沙丘的組合。、雖然鮮為人知，但它實際上是日本最大的沙丘。。不為人知的原因是、沙丘周圍有防風沙林。、人們很難看到的事情、大部分被國防部等用於彈道試驗場等。、這是因為禁止入境。。
There are many dune lakes in Higashi-dori village. Named lakes are minimum 13s. Salugamori sandhill (1~2 km width, 17 km length) include the rear wetland in this village has selected one of 500 of the important wetland of Japan (Actually most of Shimokita peninsula is selected also). Additionaly, Shimokita sandhill (includ this Salugamori sandhill with the next ones) is really the biggest one in Japan. However almost all japanese don’t know of it. One of the reason is that this place is hidden from the roads by pine grove for protect the wind and the sand. The other one, here is off limited, because this ares has been useing for test site of trajectory of Ministry of Defence (MD).
沙丘湖本身位於國防部區域之外。、其中一些似乎也用於捕魚目的。。不過，用於防風沙的松林也變得更大了。、許多通往沼澤的道路正在消失。。這裡的人口減少和老化也在持續。、目前尚未進行任何學術研究。。
These are out of the area of MD. A few lakes of it look as useing fishery sometimes but not often. Most of the roads to go there is being lost by growing thickly weeds and pine grove. Creasing depopulation and ageing there. Academic reserch stopped now.
照片由上至下（由北到南排列）、大沼、左京沼澤、荒沼。大小和深度略有不同，但均處於自然狀態。。大沼是一隻大蝦、左京沼因Aegagropila Linnaei而聞名。、現在還沒有進行研究會發生什麼事？。荒沼深1-2m。、蓴菜正在收穫。。
Photo:(above) O-numa. Small river prawn lives in. (midlle) Sakyo-numa. Sakyo-numa is famous for “Hime-malimo” (small moss ball), but how is it now? (bottom) An old woman was picking “Jun-sai” (the water shield) from the water at lake Ala-numa. ※numa means lake or pond. All of dune lakes are Nature.
