再生水补给的城市景观水体富营养化和生态防治

采用卫星定位方式,在S湖面选取五个观测点,对再生水补给的城市景观水体富营养化状况进行研究。结果显示,湖水中主要指标营养源CODcr.、TP、TN含量由原来的天然河水补给时9月份的峰值220、2.6、2.19（mg·L-1）分别下降到180、2.1、1.83（mg·L-1）,NH3-N含量由5月的峰值1.92（mg·L-1）下降到1.68（mg·L-1）;叶绿素和水体的PH也基本成良性发展态势,水体的富营养化得到一定的缓解。同时使用生态漂移岛为主的立体生态学复技术,对再生水补给的城市景观水体富营养化生态防治效果进行研究。研究结果表明,所选择的修复植物对水体中的富营养化指标物蓝藻和各种营养源的去除和控制率达到97%以上,实验点水质有较大改观,基本可避免城市景观水体因再生水补给带来的二次深度污染。

Eutrophication and Ecological Restoration of Urban Landscape Water Supplemented by Reclaimed Water

Taking Lake S as the research subject, using the GIS to fix 6 points in the lake to study the eutrophication and ecological restoration effect of the urban landscape water. The result exposes that the top highest record of the indices nutrient sources such as CODcr., TP and TN falls from 220, 2.6 and 2.19 （mg-L-1） to 180, 2.1, and 1.83 （mg＇L-1） separately in September, and the content of NH3-N descents from 1.92 （mg.L-1） to 1.68 （mg.L-l）; and the Chlorophyll and the PH of the water present the normal trend after supplemented by the reclaimed water, namely, the eutrophication states of the lake can be relieved temporarily. But in order to eliminate high TP, TN in the lake from the reclaimed water ,the author tried to apply the ecological floating artificial island technology to treat the eutrophication nutrition and the index blue green algae, the controlled and restricted rate of the chosen plants in the artificial island is about 97%, the quality in the experimental area meets the urban life water standard gradually, that is to say. It is possible to control and eliminate the eutrophication nutrient sources from the supplemented reclaimed water in the urban landscape water by the ecological technology and escaping the second further water environment pollution.