EFFECT OF THE EMERSED PLANTS AND SUBMERGED PLANTS ON THE RIVER WATER QUALITY

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  • 抽水植物, 沈水植物が河川水質に与える影響
  • 高速回転ディスクによる余剰汚泥の高効率可溶化処理に関する研究
  • チュウスイ ショクブツ チンスイ ショクブツ ガ カセン スイシツ ニ アタエ

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Effect of the emersed plants and submerged plants on the river water quality was estimated based on the field survey. Concerning the emersed plants, it was revealed that they didn't purify the river water in ordinary water discharge period. The main cause of purification by the plants was the sedimentation in flood period. On the other hand, the submerged plants purified the river water in ordinary water discharge period. In flood period, however, they came off from the river bed and caused pollutant loads to the lower reaches. The merit of existence of aquatic plants in the river bed should not be estimated from the view point of water quality purification but from the view point of ecosystem conservation.

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