Flood potential in Yilan City, Yilan County
Yilan City covers 30.6 km². Under 24 h / 350 mm, 5.3 km² (17.3%) is simulated to flood above 0.3 m; under 24 h / 650 mm, 17.7 km² (57.7%). The table gives all ten scenarios and five depth classes.
Among the 12 townships of Yilan County, the 24 h / 350 mm simulated share ranks 4 (county average 2.4%) and the 24 h / 650 mm share ranks 3 (average 5.7%). Nationally, 16 and 4 of 368.
| Scenario | 0.3–0.5 m | 0.5–1 m | 1–2 m | 2–3 m | >3 m | Total flooded km² | Share |
|---|---|---|---|---|---|---|---|
| 6 h / 150 mm | 0.6 | 0.2 | 0.0 | 0.0 | 0.0 | 0.8 | 2.6% |
| 6 h / 250 mm | 1.8 | 1.5 | 0.5 | 0.3 | 0.1 | 4.2 | 13.8% |
| 6 h / 350 mm | 2.8 | 3.4 | 1.5 | 0.5 | 0.5 | 8.8 | 28.8% |
| 12 h / 200 mm | 1.3 | 0.8 | 0.1 | 0.0 | 0.0 | 2.2 | 7.3% |
| 12 h / 300 mm | 2.3 | 3.1 | 1.0 | 0.3 | 0.0 | 6.8 | 22.2% |
| 12 h / 400 mm | 2.7 | 4.0 | 2.9 | 0.5 | 0.3 | 10.3 | 33.8% |
| 24 h / 200 mm | 0.4 | 0.4 | 0.0 | 0.0 | 0.0 | 0.8 | 2.5% |
| 24 h / 350 mm | 2.5 | 2.0 | 0.7 | 0.1 | 0.0 | 5.3 | 17.3% |
| 24 h / 500 mm | 2.8 | 5.4 | 3.7 | 0.5 | 0.0 | 12.5 | 40.7% |
| 24 h / 650 mm | 2.5 | 5.1 | 6.2 | 2.3 | 1.5 | 17.7 | 57.7% |
Areas are sums of 40 × 40 m cells. Nationally the cell sums run 0.3–0.5% above the original polygon areas (measured per scenario); the error is larger for small townships. A scenario is a design rainfall: total over the duration, not per hour. The depth class is the maximum simulated depth in the cell.
Road accidents in Yilan City — the same township in the road accident heatmap: casualty accidents by hour, cause and vehicle type.
Other townships in Yilan County
Zhuangwei Township Wujie Township Luodong Township Dongshan Township Jiaoxi Township Su'ao Township Yuanshan Township Toucheng Township Sanxing Township Nan'ao Township Datong Township