摘要
研究了滇池东北沿岸带生态修复区去除水体中污染物和营养盐的能力．对修复区在重富营养水体迎风岸、无陆源污染情况下通过收获水生植物和促进悬浮物沉降方式去除的湖泊内源污染物质进行了定量的监测分析．结果显示,修复区对外来的悬浮物质具有强大的凝集、固定作用,植被区内每平方米湖面平均年沉积量达118．9 kg(干重),其中的氮、磷、有机碳含量分别达120 g／(m2·a)、70 g／(m2·a)、1080 g／(m2·a):修复区内的底质环境得到明显改善,表层沉积物中氮和有机碳含量比原初提高了4倍以上;修复区内水生植被具有极高的生产能力,仅2002年修复区就收割打捞水生植物113t(干重),由此去除氮、磷分别为30．0 g／(m2·a)和4．8 g／(m2·a).因此,沿岸带生态修复完全可以作为湖泊内源污染净化的一项工程措施在滇池东北沿岸或类似重污染水体推广应用．
The effects of removing the pollutants by aquatic plants in the restoration zone in the northeastern of Dianchi Lake were investigated in this paper. The volume of the pollutants removed from the lake by the aquatic plant harvesting and the sedimention had also been estimated. The result showed that the restoration zone had a remarkable accelerative effect on silting-up of the restoration. In the whole restoration zone, the average sedimentation flux was 118.9kg/（m^2·a）. There fore it means about 120g/（m^2·a） TN, 70g/（m^2·a） TPand 1080g/（m^2·a） TOC can be removed from lake. The situation of the sedimention in the zone has been improved a lot, as the concentration of TN and TOC in the surface sediment was 4 times as high as before. The amount of harvested aquatic plants was about 113000 kg in 2002, which means that 30.0 g/（ m^2·a） TN and 4.8 g/（ m^2·a） TP were removed from lake. Therefore, it can be concluded that the restoration of aquatic plants in the littoral may be used as an effective engineering measure for lake＇s pollution control especially the algae bloom control at the northeastern Dianchi Lake, and in other severely polluted water bodies.
出处
《湖泊科学》
EI
CAS
CSCD
北大核心
2006年第6期579-584,共6页
Journal of Lake Sciences
基金
科技部重大项目"滇池污染治理技术研究"(K99-05-35-01)
中国科学院知识创新工程领域前沿项目(CXNI-GLAS-A02-04)共同资助.
关键词
滇池
沿岸带
生态修复
污染净化
D ianchi Lake
aquatic plants
ecological restoration
removing pollutant
