韓璐



摘要 以上海曲陽公園中心湖水體為研究對象,通過分析其污染成因、污染狀況和湖體水質,結合水質改善及景觀功能定位,確定中心湖生態修復技術。通過對湖底的生境營造及對水生植物系統、水生動物系統及微生態系統的修復,使水體具備自我凈化能力,并維持水中湖生態系統的平衡。研究結果表明,水生態系統建成1年后,中心湖水體透明度、化學需氧量(COD)、氨氮(NH3-N)、總磷(TP)等指標均較構建前有顯著改善。該研究結果對城市景觀水體的水質改善、生態建設和后期管理均具有一定的指導性意義。
關鍵詞 城市景觀水體;水質改善方法;生態修復;曲陽公園
中圖分類號 S181 文獻標識碼 A 文章編號 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年代以來,隨著經濟的迅猛發展,人口的急劇膨脹,城市各種景觀水體的納污量大幅增加。多年來,大量工業廢水、生活污水未經處理嚴重超標直接排入水體,使得水體水質變差,呈現富營養化狀態。雖然近幾年已做出努力,但水質改善仍然有限,而且處于不穩定狀態。
公園水體作為城市水生態環境的主要組成部分,對人們的生活發揮著重要作用。它不僅能美化居住環境,還可以改善局部小氣候,優化生態環境。
城市水體污染主要是污染源的侵入,如天然降雨、大氣中的揚塵、生活垃圾的侵入,長期積累的水底淤泥及淤泥釋放的有害物質。加上水體溶解氧過低,缺少水生動、植物生存的環境,使水體逐漸失去自凈能力,底泥不斷釋放分解為氮、磷等營養鹽,導致水體富營養化,水體逐漸變綠,藻類瘋長,最終導致“水華”現象?!?br>