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引用本文:李文朝,潘继征,陈开宁,胡耀辉,刘正文.滇池东北部沿岸带生态修复技术研究及工程示范——生态修复目标的确定及其可行性分析.湖泊科学,2005,17(4):317-321. DOI:10.18307/2005.0406
LI Wenchao,PAN Jizheng,CHEN Kaining,HU Yaohui,LIU Zhengwen.Studies and Demonstration Engineering on Ecological Restoration Technique in the Littoral Zone of Lake Dianchi:the Target and Feasibility. J. Lake Sci.2005,17(4):317-321. DOI:10.18307/2005.0406
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滇池东北部沿岸带生态修复技术研究及工程示范——生态修复目标的确定及其可行性分析
李文朝, 潘继征, 陈开宁, 胡耀辉, 刘正文
中国科学院南京地理与湖泊研究所, 南京 210008
摘要:
作为"滇池沿岸带生态修复技术研究及工程示范"系列研究论文之一,主要分析研究了滇池东北部沿岸带原有生态状况、现有环境基础、实施局部岸段生态修复的有限目标、实现这一目标的主要限制性环境因子及其可控性.结果显示,滇池东北部沿岸带入湖河流密集,发育良好的湖滩湿地原本是拦截净化入湖河水的生态屏障;湖滩湿地被围垦之后,人工岸堤前风浪侵蚀强烈,水生植物和水生动物消失,但沙质沉积物淤积形成了次生浅滩;在次生沙滩上创建挺水植被,仍然可以发挥沉积掩埋污染物、捕获分解漂浮性蓝藻的污染控制功效;实施生态修复所面临的限制性环境因子主要为风浪的强烈冲刷和水质严重污染,这些因素都可以通过相应的环境改造与控制措施加以解决,因而实现生态修复目标是可能的.
关键词:  滇池  沿岸带  生态修复  限制性环境因子
DOI:10.18307/2005.0406
分类号:
基金项目:中国科学技术部专项(K99-05-35-01-02)中国科学院知识创新工程领域前沿项目(CXNIGLAS-A02-04)
Studies and Demonstration Engineering on Ecological Restoration Technique in the Littoral Zone of Lake Dianchi:the Target and Feasibility
LI Wenchao, PAN Jizheng, CHEN Kaining, HU Yaohui, LIU Zhengwen
Nanjing Institute of Geography & Limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. China
Abstract:
As part of the series studies on ecological restoration technique in the littoral zone of Lake Dianchi, this paper investigated the primary wetland environment and vegetation in the northeastern bank littoral zone of Lake Dianchi, the present environmental bases, the target and feasibility for ecological restoration, the key limiting environmental (actors and their controllability. It resulted that, there were four inflow rivers in the research area which took large amount of soil into the lake and formed 4 km2 wetland in the littoral zone. The reed-vegetated wetland worked as an ecological barrier to keep the lake from pollution. When the concrete dike was built up, the wetland was made into paddy field and fish pond. In front of the dike the aquatic plants and animals, and even the soil were washed out by strong wind waves. Only sand from the nearby rivers was moved here and formed a sand beach, witch was growing up at the rate of 20mm/a. For the effect of both wind waves and water pollution, no any plant growing on the sand beach. It's possible, feasible and reasonable to establish new wetland vegetation on the sand beach in front of the dike. The key limiting factors, both wind waves and water pollution were controllable. It was confirmed lhat the new wetland vegetation could be established, stabilized and will work for pollution control.
Key words:  Lake Dianchi  littoral zone  ecological restoration  limiting environmental factors
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