普通克里格法在乌梁素海水体富营养化研究中的应用

The application of ordinary kriging in the study of water eutrophication of Wuliangsuhai Lake

以位于我国北方半干旱地区的河套灌区中草型浅水湖泊乌梁素海为研究对象,将实测数据与空间数据应用普通克里格法的理论与方法,尝试研究乌梁素海水质参数空间分布特性。结果显示,乌梁素海水质参数的空间结构变异性是客观存在的,各水质参数都具有块金效应;并对乌梁素海水质参数进行克立格插值,为进行水体富营养化评价可以提供更为直观的水环境信息。研究表明乌梁素海水体富营养化程度十分严重,属于中、重度富营养化,研究结果对乌梁素海的湖泊水环境管理具有一定的参考价值。

Wuliangsuhai Lake(WL),which is a typical shallow weedy lake lies in Hetao Irrigation Area in the north of China,is the research lake.The ordinary kriging were used to characterize the spatial distribution of water quality parameters of Wuliangsuhai Lake with the measured spatial water quality data.The variability of spatial structure of the water quality parameters of Wuliangsuhai Lake is revealed and each parameter shows the effect of nugget.Interpolation with ordinary kriging was applied to identify the different levels of water pollution,which gives more distinguishable information about the water quality.The results showed that the eutrophication of Wuliangsuhai lake is in a very serious and severe state;the conclusions are of important menaing to the environmental management of Wuliangsuhai Lake.