Table 1 Comparison of migration speed of three Barchan dunes interpreted by carbon-14 dating method and remote sensing images
沙丘位置 | 现代碳 比值 | 死亡年份 T0 | 沙丘长度 L/m | 利用14C测年法确定的 移动速率v1/(m·a-1) | 遥感影像解译的移动 速率v2/(m·a-1) | 移动速率相对误差 (|v1-v2|×100/v2)/% |
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38.789°N, 102.989°E | 1.236 | 1983 | 99.85 | 2.56 | 2.48 | 3.24 |
38.773°N, 102.997°E | 1.106 | 1997 | 97.85 | 3.91 | 4.08 | 4.07 |
38.641°N, 102.875°E | 1.088 | 1999 | 117.29 | 5.10 | 5.37 | 5.04 |