| 郝易成,师华定,白中科,杨泽栋,秦治恒.土壤污染调查加密布点区域优化及效率研究[J].农业环境科学学报,2019,38(5):1036-1042. |
| 土壤污染调查加密布点区域优化及效率研究 |
| The optimization and efficiency of a detailed soil sampling design |
| 投稿时间：2018-06-27 |
| DOI：10.11654/jaes.2018-0830 |
| 中文关键词: 土壤污染调查 加密布点 指示克里金 布点效率 |
| 英文关键词: soil pollution survey detailed soil sampling indicator kriging distribution efficiency |
| 基金项目:国家重点研发计划项目（2018YFF0213401） |
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| 摘要点击次数: 1902 |
| 全文下载次数: 1939 |
| 中文摘要: |
| 为探究土壤污染调查过程中，在不同区域及不同样本量情况下加密布点的效率问题，并提出高效的加密方式，结合案例验证，在初步调查的基础上，基于指示克里金预测土壤污染概率，在不同概率区间内进行加密布点，分析对比不同概率区间加密布点的效率，并在效率较高的区间内对比不同加密点位数量对结果准确性的影响。结果表明：在0.50~0.95概率区间的区域加密布点对土壤污染范围的估计精度有所提高，其他区域则产生负作用；而加密点数在11.4%（20个）以内时，会提高土壤污染范围的估计精度，加密点数超过11.4%（20个），反而会降低土壤污染范围的估计精度。在非均匀布点的前提下，基于插值估计面积的方法，加密布点不一定能提高土壤污染范围的估计精度，在大概率确定的清洁区域或污染区域加密布点，均会降低整个研究区土壤污染范围的估计精度，应该在疑似污染但不能确定的区域加密布点，才有可能提高土壤污染范围的估计精度；疑似污染区加密布点结果精度随加密点数增加呈先增加后降低的趋势，因此适当加密点位数才有助于估计精度的提高。 |
| 英文摘要: |
| To explore the efficiency of detailed soil sampling in different areas with different sample sizes during the investigation of soil pollution, and to propose an efficient encryption method, based on the preliminary investigation, this study, combined with case validation, predicted the probability of soil contamination by indicator kriging, and compared the efficiency of different probability ranges and different soil sample sizes. The distribution of encrypted sites in the area with a pollution probability between 0.50~0.95 increased the estimation accuracy of contaminated soil, while in other areas it had a negative effect. In addition, when the number of encryption sites was less than 20, the estimation accuracy of the soil contamination range increased. If the number of encryption sites exceeded 20, then the estimation accuracy of the soil contamination range decreased. Under the premise of non-uniform distribution, encrypted sites did not necessarily improve the estimation accuracy of soil contamination. Encrypting sites in clean or contaminated areas and encrypting sites too densely in suspected contaminated areas reduced the estimation accuracy of soil contamination in the entire study area. Only encrypting the appropriate number of points in the suspected contaminated area helped improve the estimation accuracy. |
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