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The Lake Eutrophication is the common concern in the international ecological environment research focus and the frontier. Rich, diverse types of lake resources, the lake with its own rich resources and a huge ecological function can not be ignored is the economic development of the human society has played a major role. Related research data shows that: the lake eutrophication is restricting our lakes, the most important issue of sustainable development, Chaohu Lake is one of the five largest freshwater lakes in China in recent years, due to natural and man-made factors, eutrophication of Lake serious deterioration of water quality exacerbated severely restricted basin sustainable socio-economic development. Shallow Lake Chaohu eutrophication serious study to analyze the distribution characteristics of the wetland sediments in Chaohu organic carbon, nitrogen, and phosphorus content as the main research content, a systematic study of sediments of the nutrients in the wetlands of Chaohu distribution law and the relationship between the various environmental media, reveals the process of Chaohu eutrophication of wetlands and endogenous pollution mechanism to understand and master the wetlands of Chaohu eutrophication source pollution, development and implementation of Chaohu wetlands provide a scientific basis for prevention and repair of eutrophication. The main results achieved in this thesis work are as follows: 1. Wetland sediments in Chaohu, organic carbon, nitrogen and phosphorus content vertical profile distribution characteristics, the highest topsoil sediments in carbon, nitrogen, and phosphorus content, showed significantly rich set phenomenon, with the depth deepened, although the carbon, nitrogen and phosphorus content in the sediments twists and turns but generally showed a decreasing trend, the lowest to the bottom. 2. Chaohu wetland sediment surface organic carbon, nitrogen, phosphorus content is generally high; geographically sediment carbon, nitrogen, phosphorus content is a significant difference, and overall higher than that of the eastern half of the lake on the western half of Lake, the eastern half of the lake individual related to differences in the distribution of carbon, nitrogen, phosphorus and sediments sampling points appear the phenomenon of spatial heterogeneity, which may be related to the sampling point the economic activities of the regional human intervention, the soil geochemical background and mineral composition. Water eutrophication phenomena: the western half of the lake than the eastern half of Lake severe. 3. Chaohu wetland sediments between total organic carbon and total nitrogen good correlation exists, phosphorus is still a limiting nutrient impact of eutrophication; affected by lake sediments power, environmental factors, and the deposition rate, Chaohu The wetland sediment organic matter mixed sources. Surface sediments TN, TP and organic matter particle size effects are more obvious. And silt, clay tablets of the class (IV) gt; very fine sand grade (III), fine sand level (Ⅱ) gt; grain size in the sand over the content of the sequence (Ⅰ). 5. Recent years, with the economic and social development of Chaohu Lake Basin, Chaohu eutrophication within source pollution and non-point source pollution impact, Chaohu water eutrophication situation still further exacerbated the trend.
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