Application of Geostatistics and Upscaling Methods on Pollution Area Characteristics Analysis and Guideline for Verifying the Attainment of Soil Remediation for Heavy Metal Contaminated Sites in Taiwan
Date Issued
2006
Date
2006
Author(s)
Cheng, Bai-You
DOI
zh-TW
Abstract
Finite Mixture Model (FMM) was used to analyze the characteristics of soil heavy metal pollution source around the 2nd and 3rd East-West irrigation systems in Chang-Hua County. The result shown that this method is more effective than other methods used before when dealing with the pollution source identification. And three statuses can be classified as point pollution, diffused pollution and normal region.
Combining Moving Windows Regression (MWR) with FMM, the soil As content in Taiwan can be divided into three categories area, this may reflects the soil formed from different mother rocks.
Besides, we use upscaling method to describe two different sampling scales in Chang-Hua. The result shows that As concentration in two scale are about the same in the whole study field, except in Nan-Shin village, Nan-May village and ping-He village. The different is caused by the polluted irrigation water.
The guideline for Verifying the attainment of Soil Remediation for heavy metal contaminated site includes four parameters: first, the concentration of every sample should be less than the control standard; second, the concentration of 97.5% probability of cumulative curve should not exceed the control standard; third, the median concentration of sampling should be below the monitoring standard; and fourth, the indicator of evenness for the remediation works should be less than two. In comparison with traditional methods, our proposed guideline is shown to be effective in verifying remediation results.
Subjects
土壤
重金屬
有限混合分佈模式
移動視窗迴歸法
復育驗收準則
地理統計
空間尺度轉換
Soil
heavy metal
Finite Mixture Model
Moving Windows Regression
Remediation
Verification method
Geostatistics
Geographic Information Systems
Upscaling.
Type
thesis
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