云南抚仙湖透明度的时空变化及影响因子分析1.PDFVIP

J. Lake Sci.(湖泊科学), 2008, 20(5): 681-686 . E-mail: jlakes@ ©2008 by Journal of Lake Sciences 云南抚仙湖透明度的时空变化及影响因子分析*1 1,2 2,3 1 4 潘继征 , 熊 飞 , 李文朝 , 李荫玺 (1: 中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室, 南京210008) (2: 中国科学院研究生院, 北京 100049) (3: 江汉大学, 武汉430056) (4: 玉溪市环境监测站, 玉溪653100) 摘 要: 根据 2005 年的综合调查资料和 1980 年以来的常规监测资料, 分析了云南高原深水湖泊抚仙湖透明度的空间分布、 年际变化及影响因子. 2005 年6-7 月抚仙湖水体透明度范围为0.5-6.2 m, 平均值为4.6 m, 透明度分布的总体格局是: 南区 北区, 湖心区沿岸区, 河口区较低. 藻类和悬浮物是影响透明度空间分布的主要因子, 随着水体中藻类和悬浮物的增加, 透 明度下降. 近20 多年来, 抚仙湖透明度呈下降趋势, 藻类增加是直接影响因子, 水体总氮、总磷的增加促进了藻类的增殖, 是 重要的间接影响因子. 关键词: 抚仙湖; 水体透明度; 时空变化; 藻类 Spatial-temporal dynamic changes of the water transparency and their influencing factors in Lake Fuxian, Yunnan Province PAN Jizheng1,2, XIONG Fei2,3, LI Wenchao1 LI Yinxi4 (1: State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P.R.China) (2: Graduate School of Chinese Academy of Sciences, Beijing 100049, P.R.China) (3: Academy of Development , Jianghan University, Wuhan 430056, P.R.China) (4: Yuxi Environmental Monitoring Station, Yuxi 653100, P.R.China) Abstract : The spatial distribution, temporal changes of water transparency and their influencing factors in Lake Fuxian, a deep lake in Yunnan Plateau, were analyzed according to the investigations during June-July in 2005 and the regular monitoring data since 1980. The Secchi disk transparency varied from 0.5-6.2m with an average value of 4.6m in Lake Fuxian during June-July in 2005, The spatial distribution pattern of transparency was: north areasouth area, littoral zonepelagic zone, and very low in the estuary area. Suspended solid and algae were the main influencing factors on spatial distribution of water tra