南湖富营养化与气象影响因子的关系研究
Study on the Relationship Between Eutrophication and Meteorological Impact Factors of the Nanhu Lake
中文摘要：
基于2004—2018年南湖的水质监测数据，利用湖泊综合营养状态指数（TLI(Σ)）对南湖水质营养状况进行综合评价，然后对南湖的TLI(Σ)与各气象因子的关系进行研究。结果表明：2004—2008年南湖水质富营养化程度呈明显的上升趋势，2008年达到峰值，呈中度富营养状态，并且首次暴发蓝藻水华；自2010年开始，两监测点总体呈下降趋势。两监测点夏季TLI(Σ)最高，春季为次高，冬季最低，均呈明显的季节性波动。两监测点月TLI(Σ)峰值均出现在7月，谷值出现在10月。南湖水体富营养化程度麦子港比湖心高，其可能原因是麦子港的人类活动影响更强。南湖TLI(Σ)与气温、日照时数、风速呈现显著的正相关关系，与气压呈现显著的负相关关系。春夏季，气温与日照为形成南湖富营养化的主导因子。
中文关键词：
南湖，水质评价，富营养化，气象因子
KeyWords：
Nanhu Lake, water quality evaluation, eutrophication, meteorological factor
Abstract：
Based on the method of Lakes comprehensive nutrition state index TLI(Σ), water quality monitoring data of Nanhu Lake from 2004 to 2018 was used to evaluate water quality of nutritional status in Nanhu Lake and then analyze its relationship with meteorological factors. It was shown that TLI(Σ) in Nanhu Lake had an increase trend during the years of 2004 to 2008, and the TLI(Σ) reached the maximum in 2008 when an outbreak of algae blooms first occurred, then there was a decrease trend after 2010. The TLI(Σ) showed obvious seasonal fluctuations with the maximum in summer and the minimum in winter. For the monthly TLI(Σ), it reached the maximum in July and the minimum in October. Compared with the Huxin station in the center of Nanhu Lake, the Maizigang station had higher TLI(Σ). It should be related with stronger human activities. TLI(Σ) and air temperature, sunshine time, wind speed had significantly positive correlation, but the air pressure was significantly negatively correlated with the TLI(Σ). In spring and summer, temperature and sunshine were the dominant factors for causing the eutrophication of Nanhu Lake.