城市景观水体水质改善的生态修复效果研究
2017-07-13韩璐
韩璐



摘要 以上海曲阳公园中心湖水体为研究对象,通过分析其污染成因、污染状况和湖体水质,结合水质改善及景观功能定位,确定中心湖生态修复技术。通过对湖底的生境营造及对水生植物系统、水生动物系统及微生态系统的修复,使水体具备自我净化能力,并维持水中湖生态系统的平衡。研究结果表明,水生态系统建成1年后,中心湖水体透明度、化学需氧量(COD)、氨氮(NH3-N)、总磷(TP)等指标均较构建前有显著改善。该研究结果对城市景观水体的水质改善、生态建设和后期管理均具有一定的指导性意义。
关键词 城市景观水体;水质改善方法;生态修复;曲阳公园
中图分类号 S181 文献标识码 A 文章编号 0517-6611(2017)13-0068-04
Effect of Ecological Restoration on Water Quality Improvement of Urban Landscape Water—Taking Central Lake of Shanghai Quyang Park as an Example
HAN Lu
(Shanghai Water Source Construction Development Co. Ltd., Shanghai 200092)
Abstract Taking Central Lake water of Shanghai Quyang Park as the research object, through analyzing the causes of pollution, pollution and lake water quality, combined with the improvement of water quality and landscape function, the ecological restoration technology of central lake was determined. By creating a lake habitat for aquatic plants and systems, aquatic systems and micro-ecosystem restoration, water bodies have the ability to self-purification, and maintain the balance of aquatic ecosystems. The results showed that aquatic ecosystems completed after one year, the central water transparency, chemical oxygen demand (COD), ammonia nitrogen (NH3-N), total phosphorus (TP), etc. than before to build a significant improvement. The results of this study have some guiding significance for the improvement of the water quality, ecological construction and later management of the urban landscape water.
Key words Urban landscape water;Water quality improvement method;Ecological restoration;Quyang Park
自20世紀80年代以来,随着经济的迅猛发展,人口的急剧膨胀,城市各种景观水体的纳污量大幅增加。多年来,大量工业废水、生活污水未经处理严重超标直接排入水体,使得水体水质变差,呈现富营养化状态。虽然近几年已做出努力,但水质改善仍然有限,而且处于不稳定状态。
公园水体作为城市水生态环境的主要组成部分,对人们的生活发挥着重要作用。它不仅能美化居住环境,还可以改善局部小气候,优化生态环境。
城市水体污染主要是污染源的侵入,如天然降雨、大气中的扬尘、生活垃圾的侵入,长期积累的水底淤泥及淤泥释放的有害物质。加上水体溶解氧过低,缺少水生动、植物生存的环境,使水体逐渐失去自净能力,底泥不断释放分解为氮、磷等营养盐,导致水体富营养化,水体逐渐变绿,藻类疯长,最终导致“水华”现象。……
