small overflow dam with water level gauge |
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navigate by keyword : amsterdam barrage blue conservation control dam discharge ecology environmental flow flowing foam gate gauge gauging gravity hydraulic hydrologic hydrology indication indicator instrument iron level management mark marker measure measurement meter nature netherlands overflow overflowing reflection river ruler scale shield spillway stream structure technology tilting water waterway weir |
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Small overflow dam with water level gauge in a river for controling water level in a nature reserve. |
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