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Groundwater --- Water-supply --- Aquifers
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Hydrogeology --- Hydrology --- Hydrogeology. --- Hydrology. --- Oregon
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Shorelines --- Ecology --- Coastal zone management --- Shore protection --- Coastal zone management. --- Shore protection. --- Shorelines. --- Analysis --- Analysis. --- Oregon.
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Nutrient pollution of water --- Phosphorus in agriculture --- Nitrogen in agriculture --- Lakes --- Wetlands --- Eutrophication --- Water quality biological assessment --- Eutrophication. --- Nutrient pollution of water. --- Water quality biological assessment. --- Fertilization --- Fertilization. --- Oregon.
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