人工湖草型清水态生态系统构建技术研究与实践——以西北某新建人工湖为例

Research and practice on the construction technology of macrophytes-dominated clear water ecosystem in the artificial lake:taking a new artificial lake in the northwest as an example

基于湖泊生态修复理论和已有工程案例成果,提出了新建人工湖草型清水态生态系统构建的方法,即通过生境条件优化,水生动物、水生植物、微生物系统构建,同时定期观测调试和维护管理,形成以沉水植物为核心,具有较强抵抗能力和自我恢复能力的草型清水态生态系统。以西北某新建人工湖为例,采用提出的方法构建了水生态系统,该人工湖运行1年后主要水质指标(除TN外)基本达到GB 3838—2002《地表水环境质量标准》Ⅲ类水质标准;湖内广泛分布有光叶眼子菜、黑藻等5种沉水植物,沉水植物对污染物具有较好的净化效果,形成了较稳定的草型清水态生态系统。

According to the lake ecological restoration theory and engineering practice cases,the construction technology of macrophytes-dominated clear water ecosystem of a new artificial lake was proposed.Through the habitat optimization and the construction of aquatic animals,aquatic plants and microbial systems,as well as regular observation,debugging and maintenance management,a macrophytes-dominated clear water ecosystem was formed with submerged plants as the core,which had strong resistance and self-recovery capabilities.Taking an artificial lake in the northwest as an example,the proposed method was used to construct a water ecosystem.After one year of operation,the main water quality indexes(except TN)reached ClassⅢwater quality standard of Environmental Quality Standards for Surface Water(GB 3838-2002).In the lake,5 submersed aquatic plants were widely distributed,such as Potamogeton lucens Linn and Hydrilla verticillata,and had a good reduction effect on pollutants.And a stable macrophytes-dominated clear water ecosystem was realized.