Flood Detection and Susceptibility Mapping Using Sentinel-1 Time Series, Alternating Decision Trees, and Bag-ADTree Models

Table 1

The floods-affecting parameters, source, classes, and scale.

Layers	Source	Number of classes	Scale (m)
Slope	DEM	0°–5.8°, 5.9°–13°, 14°–21°, 22°–30°, and 31°–71°.	30 30
Elevation	DEM	522–778, 778.1–910, 910.1–1080, 1081–1313, and 1314–1936.	30 30
Aspect	DEM	Flat (−1), north (0–22.5 and 337.5–360), northeast (22.5–67.5), east (67.5–112.5), southeast (112.5–157.5), south (157.5–202.5), southwest (202.5–247.5), west (247.5–292.5), and northwest (292.5–337.5).	30 30
Curvature	DEM	Concave, flat, and convex.	30 30
SPI	DEM	0–600, 600.1–2000, 2001–4000, 4001–8000, and >8000.	30 30
TWI	DEM	2.4–5.8, 5.9–7.4, 7.5–9.6, 9.7–13, and 14–24.	30 30
Lithology	Geology map	Crystal tuff, diabase, Eocene flysch, piedmont fan, gabbro, valley terrace deposits, limestone, pelagic limestone, peridotite, sedimentary mélange, tectonic mélange, tectonized, thinly bedded sandstone, and undifferentiated limestone.	1 : 100.000
Rainfall	TRMM	513–562, 563–593, 594–616, and 617–669 mm.	0.2 0.25
NDVI	Sentinel-2	-0.28–0.052, 0.053–0.083, 0.084–0.14, 0.15–0.29, and 0.3–0.87.	10 10
River density	DEM	0.04–1.3, 1.4–2.1, 2.2–3, 3.1–4.1, and 4.2–6.2 km/km^2.	30 30
Distance to river	DEM	0–132.4, 132.5–280.1, 280.2–438, 438.1–626.4, and 626.5–1,299 m.	30 30
Soil type	Soil map	Entisols/aridisols, rock outcrops/entisols, and rocky lands.	1 : 100.000