植物在扬州市古运河水生态修复中的技术研究

Study on the technology of plant in water ecological restoration of ancient canal in Yangzhou

扬州市古运河整治工程是全国中小河流治理项目,为保障古运河水环境,在防洪减灾工程体系建成的基本条件下,通过在迎水坡、堤顶种植多种植物,研究各种植物对水体的净化能力和对水土流失的影响,分析水里溶解氧、氨氮、高锰酸盐和总磷浓度的变化,分析水质中重金属吸附作用的变化,和对水土流失治理的影响,从而得出植物对水质改善有效的基本理论,提出水生态修复的长效机制和水土流失治理的方法。种植植物具有成本低、能耗小、没有二次污染的优点,对水生态修复效果显著,且投资相对较少、后期管理简单,非常适合老河道污染水体的修复。

The ancient canal project in Yangzhou city is a national medium and small rivers governance project. For the protection of ancient canal water environment, in the basic conditions to build disaster flood control engineering system, through planting a variety of plants on the upstream slope and levee crest, the purification ability and the effects on soil and water loss by plants are studied. Changes of dissolved oxygen, ammonia nitrogen, analysis permanganate and TP concentration in water, change of adsorption of heavy metals in water, and the effect of soil and water conservation is analyzed, so that the basic theory of plant to improve water quality is put forward. Long effect mechanism of water ecological restoration and method of soil and water loss control is proposed. Growing plant has the advantages of low cost, low energy consumption, no second pollution. It has a significant effect on water ecological restoration, relatively less investment and simple management, which is suitable for the repair of polluted water.