沙丘湖是因风而形成起伏的沙滩。、河流流入洼地时自然形成的淡水沼泽（佐形县、新泻县等）。由于洋流和波浪，水下的沙子像堤坝一样膨胀，堵塞了出口。、（与佐吕间湖、八郎形等咸水湖的形成方式不同）。沙丘湖本身是一个正在世界范围内消失的宝贵实体。、创造具有生物价值的环境。
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.
位于东通村、有许多大大小小的“沙丘湖”（仅命名沼泽就有13个）。东通村、猿森沙丘、后湿地被选为日本500处重要湿地之一（事实上，可以说下北半岛的大部分地区都是这样入选的）。。此猴嘎森林沙丘（宽1-2公里）、“下北沙丘”是沙丘（全长17公里）和稍微向内陆延伸的沙丘的组合。、虽然鲜为人知，但它实际上是日本最大的沙丘。。不为人知的原因是、沙丘周围有防风沙林。、人们很难看到的事情、大部分被国防部等用于弹道试验场等。、这是因为禁止入境。。
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).
沙丘湖本身位于国防部区域之外。、其中一些似乎也用于捕鱼目的。。不过，用于防风沙的松林也变得更大了。、许多通往沼泽的道路正在消失。。这里的人口减少和老龄化也在继续。、目前尚未进行任何学术研究。。
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.
照片从上到下（从北到南排列）、大沼、左京沼泽、荒沼。大小和深度略有不同，但均处于自然状态。。大沼是一只大虾、左京沼因Aegagropila Linnaei而闻名。、现在还没有进行研究会发生什么？。荒沼深1-2m。、ジュンサイ（Brasenia schreberi）を採っているところである。
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.
