Research Article
Mapping Pyroclastic Flow Inundation Using Radar and Optical Satellite Images and Lahar Modeling
Table 4
Comparison of the common region between the pyroclastic flow (PF) simulation and Landsat supervised classification hazard zone in Figure
7.
| Pyroclastic flow volume (m3) | Orientation (direction) | Common region between Landsat and PF simulation (pixels) | Pyroclastic flow inundation area from PF simulation (pixels) | Proportion of common region (%) |
| Region A 20,000 | E | Underestimated | Underestimated | Underestimated | SE | SSE | S | Total | — | — | — |
| Region B 27,000 | E | 252 | 284 | 88.73 | SE | 110 | 134 | 82.09 | SSE | 90 | 136 | 66.18 | S | 130 | 138 | 94.20 | Total | 582 | 692 | 84.10 |
| Region C 30,000 | E | 256 | 292 | 87.67 | SE | 110 | 140 | 78.57 | SSE | 60 | 142 | 42.25 | S | 136 | 144 | 94.44 | Total | 562 | 718 | 78.27 |
| Region E 40,000 | E | 272 | 356 | 76.40 | SE | 110 | 170 | 64.71 | SSE | 60 | 174 | 34.48 | S | 144 | 180 | 80.00 | Total | 586 | 880 | 66.59 |
| Region F 50,000 | E | 272 | 402 | 67.66 | SE | 110 | 204 | 53.92 | SSE | 60 | 198 | 30.30 | S | 144 | 204 | 70.59 | Total | 586 | 1008 | 58.13 |
| Region G 60,000 | E | 272 | 474 | 57.38 | SE | 110 | 230 | 47.83 | SSE | 60 | 238 | 25.21 | S | 144 | 226 | 63.72 | Total | 586 | 1168 | 50.17 |
| Region H 70,000 | E | 272 | 500 | 54.40 | SE | 110 | 262 | 41.98 | SSE | 60 | 252 | 23.81 | S | 144 | 258 | 55.81 | Total | 586 | 1272 | 46.07 |
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