I have done flood mapping with Sentinel 1 data for 3 districts of India (West Bengal) i.e. North Pargana, South pargana and East Medinipur. North and South Pargana are showing increasing trend in the water inundation area after the cyclone. But East Medinipur is showing decreasing trend in the water inundation area which is quite unlikely, because after the cyclone the water inundation area should be increased. Now my question is that why is the decreasing trend shown in the East Medinipur district after the cyclone. Please help me to understand this.
May be depend upon drainage network and high infiltration capacity of soil
It is impossible to say without more data. As Saurabh Gupta noted, it might be a function of drainage. And relative elevation may be a factor. So, too, may be local programs for water management in different areas. So when one sees an apparent anomaly in the mapped data it's time to find out data that might help explain it.
Prakash Biswakarma if possible you can communicate with Pro. Ashis kumar paul, Vidyasagar university. I think he will help you.
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