Low-Cost Solutions for Assessment of Flash Flood Impacts Using Sentinel-1/2 Data Fusion and Hydrologic/Hydraulic Modeling: Wadi El-Natrun Region, Egypt

Table 1

Error matrices showing the accuracy of both polarisations.

Reference-Sentinel-2
SAR-Sentinel-1	No flood	Flood	Row total	%
VV
No flood	120	21	141
Flood	17	150	167
Column total	137	171	308
Kappa	0.75		Overall accuracy	88
VH
No flood	120	27	147
Flood	20	150	170
Column total	140	177	317
Kappa	0.70		Overall accuracy	85