【摘要】 20世纪70年代异龙湖实施了围湖造田运动,在湖滨带形成大量农田和连片的鱼塘群,鱼塘群垂直堤坝对湖滨带进行了强烈的切割,破坏了湖泊水体生态系统和陆地生态系统的连续性,使湖滨带原有的天然滩地大量消失,浅水区滩地生境条件急剧恶化,水生植被结构的连续性不复存在,鱼类栖息、索饵、产卵地丧失,湖滨生态系统遭到破坏,自净能力下降,加上鱼塘排污,严重阻碍了异龙湖湖滨带生态修复和水质改善。该文介绍一种全新的湖滨带退塘还湖区挖塘堆岛基底修复工程技术方法,通过对湖滨带39.33 hm2鱼塘群区域进行塘库系统构建、堆岛、滩地、坡地等地形地貌多样性改造基底修复工程示范,为湖滨带生态系统修复创造良好的生境条件,湖滨湿地示范工程区实现了生物多样性保育、入湖河流水质净化和景观美化三大功能。更多还原

【Abstract】 In the 1970 s, large contiguous farmland and fish ponds group were formatted in lakeshore of Yilong Lake because of reclamation of land and pond from the lake. The vertical dam of ponds group produced a strong cutting on the lakeshore,which destroyed the continuity between aquatic and terrestrial ecosystem, reduced the original beach area largely, made a sharp deterioration of habitat conditions in the shallow region, destroy the structure continuity of aquatic vegetation. Mean-while, which also made the ground of fish habitat, feeding and spawning lose, self-purification capacity decrease and structure and function destroy of lake ecosystems. In addition, the fish ponds also discharge of sewage into the lake. All of these were harmful to ecological restoration and water quality improvement of lakeshore. In hence, this paper introduced a new technique of substratum restoration for digging and heaping island in the region of returning pond to lake. This technique was used in an area of 0.33 km2 fish ponds group in Lake Yilong, through basement restoration as pond area system constructing, island heaping, topography reconstructing of fish ponds group to create a good condition for ecosystem restoration, and achieved several excellent effects such as biodiversity conservation of lakeshore, water purification of the river into lake and landscap-ing three functions.更多还原