摘要
为了解决硬直驳岸河道水生植物生长条件差、河道自净能力低下等问题,通过挂壁式种植方式模拟河道的生态修复,旨在研究不同流速以及光照条件下沉水植物(苦草)生长情况及水体净化效果来验证该技术应用于苏州城区河道生态修复的可行性。研究结果表明:当城市河道流速在0～0.06 m/s时,苦草的生长不会受到影响,存活率达到95%以上;模拟河道光照条件(1 500～10 000 lx),苦草能较好生长,在高光照条件时(9 000 lx)苦草生长状态明显好于低光照条件(1 500 lx)。同时,苦草挂壁式种植对水体修复效果也较明显,实验期间苦草种植面积达到约0.144 m^3,覆盖率为14.4%,对流动水体中NH^+_4-N,NO^-_3-N和DIP的去除率分别高达86.47%、55.25%和79.2%。
In order to solve the problems of poor growth condition for aquatic plants and low self-purification ability in the hard straight revetment river channel,the ecological restoration of river channel was simulated by hanging wall planting pattern.The purpose of this paper is to study the growth and water purification effect of submerged plants (Vallisneria spp.)on different conditions of flow velocity and light,and to verify the feasibility of the application of this technique in the ecological restoration of Suzhou urban river channel.The research results showed that :when the flow velocity of urban fiver was 0~0.06m/s,the growth of Vallisneria spp.was not affected,and the survival rate was more than 95%;in the experiment of simulated river light condition (1500~10000lx),the Vallisneria spp.could grow well,however,the growth state of Vallisneria spp.under high light condition (9000lx)was significantly better than that under low-light condition (1500lx).Moreover,the effect on water restoration was also obviously with the hanging wall planting of Vallisneria spp.The area of Vallisneria spp.in the experiment was about 0.144m^3,and the coverage rate was 14.4%.The removal rates of NH4^+-N,NO3^--N and DIP in flowing water were as much as 86.47%,55.25%and 79.2%,respectively.
作者
汤春宇
谭梦
石雨鑫
邵留
于克峰
何培民
TANG Chun-yu;TAN Meng;SHI Yu-xin;SHAO Liu;YU Ke-feng;HE Pei-min(College of Marine Ecology and Environment,Shanghai Ocean University,Shanghai 200000,China;Engineering Research Center of Water Environment Ecology,Shanghai Ocean University,Shanghai 200000,China)
出处
《环境工程》
CAS
CSCD
北大核心
2018年第11期13-17,共5页
Environmental Engineering
基金
"十三五"水专项:苏州区域水质提升与水生态安全保障技术及综合示范项目(2017ZX07205)
关键词
挂壁种植
苦草
生态修复
缓流河道
hanging wall planting
Vallisneria spp
ecological restoration
slow-flow river channel
