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Rivers Environmental aspects 2 Government policy 2 History 2 Regulation 2 Dam retirement 1 Effect of human beings on 1 more ... Environmental conditions 1 Environmental policy 1 Fluvial geomorphology 1 Nature 1 Political aspects 1 River engineering 1 Soil erosion 1 Stream ecology 1 Water quality management 1 Water-supply 1 Watershed restoration 1 less ...

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