调查评价的土壤元素累积趋势预测——以广西南宁市西乡塘区为例
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王磊, 卓小雄, 吴天生, 凌胜华, 钟晓宇, 赵晓孟
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Prediction of the soil element accumulation trends based on 1∶250 000 and 1∶50 000 geochemical surveys and assessments of land quality:A case study of Xixiangtang District, Nanning City, Guangxi zhuang Autonomous Region
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WANG Lei, ZHUO Xiao-Xiong, WU Tian-Sheng, LING Sheng-Hua, ZHONG Xiao-Yu, ZHAO Xiao-Meng
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表15 土壤环境质量分级点位数统计(n=189)
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Table 15 Grade statistical of soil environmental quality at point (n=189)
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评价类别 | 评价对象 | As | Cd | Cr | Hg | Pb | 综合分级 | 优先保护 | 2007年(1∶25万) | 126 | 133 | 152 | 189 | 186 | 99 | 2017年(1∶5万) | 118 | 121 | 103 | 188 | 185 | 75 | 2027年(通量模型) | 115 | 121 | 106 | 188 | 181 | 70 | 2027年(单时段增量) | 107 | 113 | 89 | 187 | 177 | 56 | 安全利用 | 2007年(1∶25万) | 63 | 56 | 37 | 0 | 3 | 90 | 2017年(1∶5万) | 71 | 68 | 86 | 1 | 4 | 114 | 2027年(通量模型) | 73 | 68 | 83 | 1 | 8 | 118 | 2027年(单时段增量) | 81 | 76 | 100 | 2 | 12 | 132 | 严格管控 | 2007年(1∶25万) | 0 | 0 | 0 | 0 | 0 | 0 | 2017年(1∶5万) | 0 | 0 | 0 | 0 | 0 | 0 | 2027年(通量模型) | 1 | 0 | 0 | 0 | 0 | 1 | 2027年(单时段增量) | 1 | 0 | 0 | 0 | 0 | 1 | 优先保护点位占比 | 2007年(1∶25万) | 66.67% | 70.37% | 80.42% | 100.00% | 98.41% | 52.38% | 2017年(1∶5万) | 62.43% | 64.02% | 54.50% | 99.47% | 97.88% | 39.68% | 2027年(通量模型) | 60.85% | 64.02% | 56.08% | 99.47% | 95.77% | 37.04% | 2027年(单时段增量) | 56.61% | 59.79% | 47.09% | 98.94% | 93.65% | 29.63% |
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