Dianchi Lake - A hypereutrophic lake in China
文献类型：期刊论文
| 作者 | Peimin, PU |
| 刊名 | Restoration and Management of Tropical Eutrophic Lakes
 |
| 出版日期 | 2005 |
| 页码 | 423-518 |
| 英文摘要 | Dianchi Lake has water surface area of 298 km(2), mean depth of 4.4 m and catchment area of 2920 km(2), occupying the sixth largest fresh water lake in China. It is located at the elevation of 1886 meters a.s.l. Getting more intensive sunshine, the highland lake has the higher preliminary production and possesses the characteristics of lakes in the lower latitudes-lakes in the tropical zone. It was rich in aquatic vegetation with more than 100 species, in association with abundant biodiversity in history, The water quality of Dianchi Lake was quite good as the safe drinking water source before the 1970ties. It is a notable recreation site and reputed as "a Sparkling Pearl Imbedded in the Yunnan-Guizhou Plateau". Starting from the last years of 1970ties, the degradation of water quality became more rapidly. A lot of conventional measures have been taking for controlling eutrophication especially since 1980. But the problem for in proving water quality, to controlling eutrophication and to reconstructing the health aqua-ecosystem, is still far from its solving. All these aspects, such as the background information on the changes of eoc-environmental situation from healthy to degraded hyper-eutrophic state in Dianchi Lake, the reasons of rapid development of eutrophication in Dianchi Lake, the various measures and their results performed for controlling eutrophication were introduced in the first paragraphs of this Chapter.How can we save Dianchi Lake from progressive environmental deterioration? It needs to develop new strategies and technologies based on the laboratory and field experiments. After the event in 1990 (the direct economic lost was about USD 15 million during a week for Wuxi City, Jiangsu Province, after an event of algae bloom in Taihu Lake in summer 1990), a serial research and experiment projects directly towards for reconstruction of the helath aqua-ecosystem in local area, especially in the intake area of drinking water source was performed under the support of the Chinese State and Provincial Government, the Chinese Academy of Sciences, and the International Organizations as well. The small-scale experiments of a couple of thousands or ten thousands square meters were taken place in different environmental conditions. The research results were summarized in the retral paragraphs of this Chapter.The technology for reconstruction of healthy aqua-ecosystem and improvement of water quality in the surface waters from local to all the surface water systems in the catchment step by step mainly using solar energy was named as "Physic-Ecological Engineering-PEEN. it contains 5 key techniques, namely: i) Soft wall and physic-biological membrane technology, ii) Technology for Removing Algae Plume (TRAP) and Improving Transparency, iii) Mosaic technology and Macrobionics, iv) Technology of Immobilized Nitrogen Cycle Bacteria (INCB), and v) Ecological floating island and 5 M-key taches, namely: a) Macrophyte, b) Microorganism, c) Mollusk, d) Macrobionics, and e) Management.The possibility of rapid decrease of pollutants loading into the lake in the next a few years is very low. The approach of dredging sediment is a costly one, but the theoretical analysis and the practices in Dianchi Lake and other lakes showd that it is neither the sufficient nor the necessary one for controlling eutrophication in lakes. Controlling Eutrophication by enhancing purification capacity in lakes might be the most cost-effective approach. The purification capacity in water body should to be enhanced up to form the concentration, which would be lower the thresholds of the nutrients for preventing the algae bloom. To use the sunshine and solar energy to improve the preliminary production in lake by high efficiently transforming the nutrients in water into the biomass and taking off them from the water body as usable and economic beneficial resources by using PEEN technology. Therefore, to develop the Bio-Environmental Enterprise (BEE) is the perspective way out for controlling eutrophication. The theoretical basis and technical approaches for controlling eutrophication by enhancing purification capacity in lakes and the technology for utilizing the aquatic plant and other resources were dealt in this Chapter. The perspective for controlling eutrophication in the surface waters appears with optimism. Of course, there are a lot of issues in this field still need to be studied and solved in the further. |
| 公开日期 | 2012-03-07 |
| 源URL | [http://159.226.73.51/handle/332005/2857]  |
| 专题 | 南京地理与湖泊研究所_湖泊室 |
| 推荐引用方式 GB/T 7714 | Peimin, PU. Dianchi Lake - A hypereutrophic lake in China[J]. Restoration and Management of Tropical Eutrophic Lakes,2005:423-518. |
| APA | Peimin, PU.(2005).Dianchi Lake - A hypereutrophic lake in China.Restoration and Management of Tropical Eutrophic Lakes,423-518. |
| MLA | Peimin, PU."Dianchi Lake - A hypereutrophic lake in China".Restoration and Management of Tropical Eutrophic Lakes (2005):423-518. |
入库方式： OAI收割
来源：南京地理与湖泊研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。