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GEOSTATISTICAL ANALYSIS OF SOIL ARSENIC CONTENT IN TAIWAN

机译:台湾土壤砷含量的地统计分析

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摘要

A combined geostatistical and computergraphic approach was developed for illustrating the soil Arsenic map of Taiwan. Data were collected from the Environmental Protection Administration's study targeting agricultural soils in Taiwan. The range and arithmetic mean of the As contents in the surface soils (0 to 15 cm) of the study samples are as follows: 0.01 to 16.16,5,65 (mg/kg dry soil). Variograms (semivariograms) indicated spatial correlation at distances up to 195.0 km. the data exhibited some anisotropy, but this has little effect on kriging. An exponential variogram model was fitted using least squares and used to krige a grid covering Taiwan. Soils southwest of Taiwan tended to contain higher levels of As than average. The map will be useful in future research to determine the geographic distribution of regional patterns of plants and groundwater As content, the relationship between As and parent soil material, and correlation with of occurrence of blackfoot disease.
机译:为了说明台湾的土壤砷图,开发了一种组合的地统计和计算机方法。数据来自环境保护总署针对台湾农业土壤的研究。研究样品的表层土壤(0至15 cm)中As含量的范围和算术平均值如下:0.01至16.16,5,65(mg / kg干燥土壤)。变异函数图(半变异函数图)表示在距195.0 km处的距离具有空间相关性。数据表现出一定的各向异性,但这对克里金法几乎没有影响。使用最小二乘法拟合了指数变异函数模型,并将其用于克里格覆盖台湾的网格。台湾西南部的土壤中砷含量往往高于平均水平。该图将在未来的研究中,用于确定植物和地下水As含量的区域格局的地理分布,As与母体土壤物质之间的关系以及与黑脚病发生的相关性。

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