Distribution of Different Species of Mercury in Baihua Lake, Guizhou Province

Abstract

均匀布点采集百花湖表层水样44个,对水样不同形态汞含量进行了分析,并现场测定水质参数。采用经典统计学与半变异函数拟合相结合的方法,研究了百花湖表层水中不同形态汞含量的空间变异性。根据半变异函数拟合的结果,在ArcGIS软件的支持下进行克立格插值,以此来揭示百花湖表层水中不同形态汞含量的空间分布规律。研究表明:百花湖表层水中的汞污染主要来自上游,随水体流动汞污染减少;但也有一些区域可能因富营养化而使颗粒态汞和总汞含量增加。;Forty-four surface water samples were collected in Baihua Lake, Guizhou Province.The different species of mercury and water quality parameters, such as reactive mercury, dissolved mercury, particulate mercury, were tested.The spatial variability of different species of mercury in the surface water of Baihua Lake were studied based on the mathematical statistics and Geostatistics methods (Kriging).On the basis of the models of semivariance fitness, we used ArcGIS software to proceed Kriging interpolator to reveal the distribution patterns of different species of mercuiy in the surface water of Baihua Lake.The results indicate that mercury contamination in the surface water of Baihua Lake is due to headwaters, then mercury contents will decrease with the direction of flowing water.But in the region of eutrophication, the contents of particulate mercury and total mercury increase.