滨海再生水河道中沉水植物的恢复对水质的改善  

The Restoration of Submerged Macrophytes for Improving Water Quality in A Reclaimed Wastewater River in Tianjin Binhai New Area, China

作　　者：王卫红[1] 季民[2] 

机构地区：[1]天津大学建筑学院,天津300072 [2]天津大学环境科学与工程学院,天津300072

出　　处：《农业环境科学学报》2007年第6期2292-2298,共7页Journal of Agro-Environment Science

基　　金：国家863攻关课题"天津市滨海新区水环境质量改善技术与综合示范"(2003AA601030);中国博士后科学基金资助

摘　　要：通过连续监测河道水质与沉水植物生物量的变化,对天津滨海新区一个景观再生水河道开展了为期2年(2004—2005)的中试规模的研究,以期了解含盐再生水中沉水植被的恢复对水质的影响。结果表明,重建沉水植被后河道水质有显著改善。沿河道水流方向,水体中的营养盐和沉水植物的生物量呈下降趋势,叶绿素a的值则沿河道呈上升趋势,河道水体中的COD基本上没有变化,河道水体中的盐度与河道底泥的盐度在两年之内平衡在4000mg·L-1左右。相关分析发现沉水植物的生物量与叶绿素a呈显著的线性负相关。沉水植物能够通过吸收作用减少底泥对再生水中营养盐的富集,耐盐沉水植物川蔓藻(Ruppia maritima)和篦齿眼子菜(Potamogeton pectinatus)可以作为修复沿海盐水河流水质的先锋植物。The water quality and the biomass of submerged macrophytes were monitored monthly for a 2-year （2004-2005） period to obtain information on the restoration of submerged macrophytes for improving water quality in the pilot scale area of the reclaimed wastewater river in Tianjin Binhai New Area, China. The results showed that the water quality was remarkably improved after the reestablishment of submerged macrophytes. Along the river, nutrients and biomass of submerged macrophytes in the river decreased significantly, but chlorophyll a tended to increase, while, CODCr in the river water body had little change. Salinity of the rive water body and salinity of the bottom mud were in a basic balance at about 4 000 mg·L^-1 within two years. There existed a significantly linear negative correlation between the biomass of submerged macrophytes with chlorophyll a in the river. Submerged macrophytes can reduce the enrichment of the nutrients to the bottom mud in the reclaimed wastewater through absorbing. It is suggested that the saltwater tolerant plants such as Ruppia maritima and Potamogeton pectinatus should be used as the pioneer plants for restoration of urban coastal streams.

关 键 词：沉水植物 恢复 再生水 盐度 水质 天津滨海新区 

分 类 号：X173[环境科学与工程—环境科学]