A spatial variability structure of the environmental background values for element calcium of the topsoil in China was analysed.
应用地统计学方法研究了中国土壤表层钙元素背景值的空间变异结构，并借此进行了钙元素背景值的地域估值。
Some groundwater environmental background values were suggested to be the important reference index of groundwater oil pollution.
提出地下水环境对照值可以作为地下水是否受到油类污染的重要参考指标。
With Zhenezhou area as an example, this paper discusses the application of geochemical exploration to the study of environmental background values and environmental evaluation.
本文以郑州地区为例，讨论了冲积平原区用地球化学勘查方法进行环境背景值和环境评价方面的研究。
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