摘要
针对目前护坡生态修复多注重技术本身,缺少工程实施后的评估问题。选取太湖流域某河道采取砌块式生态护坡案例,提出了护坡适用的植物群落组合,探明砌块式生态护坡对控制降雨地表径流污染削减效果,SS、TN、NH3-N、TP和COD去除率分别为60%、48%、37%、51.6%、35%。同时通过调查护坡示范区和非示范区地段浮游动物和底栖生物情况,评价护坡修复后效果,发现修复后护坡植物覆盖度和种类明显增加,生物多样性更加丰富,群落结构将逐渐趋于稳定,生态稳定性提高,生物生长、栖息、繁衍的环境趋于变好,为评价砌块式生态护坡实施效果提供科学依据。
Considerable stream-bank restoration constructions of different types have been built; however, post-evaluation of these ecological slope-protection structures was overlooked though attention was attached to the assessment of technology itself. This paper introduced a type of ecological slope-protection by laying blocks made of eco-concrete, a composite of silt and cement, which was integrated with vegetation of plant community combinations in Taihu Lake watershed. As a case study, the effects of surface runoff pollution reduction of the ecological slope-protection were investigated, which proved the removal rates of SS, TN, NH3-N, TP and COD were 60%, 48%, 37%, 51.6% and 35% respectively. At the same time, through probing into species of zooplankton and benthos, it was found that the species and coverage of slop plants increased, biodiversity became abundant, the structural stability of riverbanks enhanced. In conclusion, results of the case study provide a scientific basis for evaluating the ecological effects of riverbank restoration
出处
《环境科学与技术》
CAS
CSCD
北大核心
2014年第4期26-30,123,共6页
Environmental Science & Technology
基金
国家水专项(2012ZX07506-001)
江苏省科技支撑(BE2011809)
江苏省水利科技项目(2011009)
关键词
生态护坡
效果评价
污染物削减
生态稳定性
生态多样性
ecological slope protection
effect evaluation
pollutant reduction
ecological stability
ecological diversity
