Table 3. Detection changes with buried depth and root size by GPR 700 MHz.

Depth(m) Model-root size(cm) Total capture rate(%)
1.5 2.2 3
0.2 77.8(7/9) 100(9/9) 100(9/9) 92.6
0.5 77.8(7/9) 88.9(8/9) 100(9/9) 88.9
0.8 44.4(4/9) 88.9(8/9) 100(9/9) 77.7
Total capture rate(%) 66.7(18/27) 92.6(25/27) 100(27/27) 86.4