RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2005, Vol. 14 >> Issue (4): 475-480.

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HUMAN IMPACT RECORDED IN THE SEDIMENT OF HONGHU LAKE

YAO Shu-chun(1,2), XUE Bing(1), XIA Wei-lan(1)   

  • Received:1900-01-01 Revised:1900-01-01 Online:2005-07-20
  • Contact: Yao Shu-chun

Abstract: Two short sedimentary cores were collected from Honghu lake named HN and HS. The total organic carbon, total nitrogen, phosphorus, susceptibilities, elements and partial size were analyzed. Combining with 137Cs dating, the results indicated that nutrient evolution succession of historical period can be divided into three stages. Before 1840 the lake was characterized with lower productivity, during about 1840~1950 there was an obvious increase of organic production because of population increase. Since 1950, human impacts have accelerated the lake′s trophic status. Large amounts of carbon, nitrogen, phosphorus have accumulated in the sediment. The accumulation of these nutrients is considered to be the discharge of sewage water from multiple sources and cultivation of the lake. The comparison of indices of the two cores shows that district difference does exist due to the inlet water flow, matter source and human impacts. It can be concluded that the human impacts have greatly disturbed the process of natural environmental evolution of Honghu lake.

Key words: Honghu lake, historical period, human impact, lake deposit

[1] HUANG Yingsheng,, CHEN Shijian,WU Houjian,| ZHU Mingyong,. ANALYSIS OF EVOLUTION FACTORS AND ECOLOGICAL PROTECTION STRATEGIES FOR HONGHU LAKE [J]. RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN, 2007, 16(4): 504-504.
[2] YAO Shu-chun, XUE Bin, LI Shi-jie, LIU Ji-feng, XIA Wei-lan. SEDIMENTATION RATES IN HONGHU, CHAOHU AND TAIHU LAKES IN THE MIDDLE AND LOWER REACHES OF THE YANGTZE RIVER [J]. RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN, 2006, 15(5): 569-573.
[3] DU Yun,CHEN Ping, Kieko SATO, Hajime AOE, HE Bao-yin. CURRENT WATER ENVIRONMENTAL STATUS AND DOMINANTFACTOR ANALYSIS IN HONGHU LAKE [J]. RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN, 2005, 14(4): 481-485.
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