针对珠三角区域含镉和铬的耕地土壤以S尺度(2 km × 2 km)、N尺度(4 km × 4 km)、M尺度(8 km × 8 km)和L尺度(16 km × 16 km)4种不同采样密度进行调查,采用空间插值表征法、地统计法和Cochran经典公式法等多种方法来确定珠三角区域土壤重金属监测最优网格尺度.通过多种模型分析比较,珠三角区域土壤镉和铬化学因子在M尺度或相当尺度监测是较为合适的.
Research on the Optimal Monitoring Network of Soil Cadmium and Chromium Chemical Factors at Large Scale
Four different sampling densities,namely S-scale(2 km × 2 km),N-scale(4 km × 4 km),M-scale(8 km × 8 km),and L-scale(16 km × 16 km),were used to investigate the soil of cultivated land containing cadmium and chromium in the Pearl River Delta region.Various methods,such as spatial interpolation characterization,geostatistics,and Cochrane formula,were employed to determine the optimal grid scale for soil heavy metal monitoring in the Pearl River Delta region.Through multiple model analyses and comparisons,it is suitable to monitor the chemical factors of cadmium and chromium in the soil of the Pearl River Delta region at the M-scale or equivalent scale.
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