Cyclone Amphan and crop damage assessment using Remote Sensing and GIS technology
After any natural catastrophe it is imperative to answer the questions such as how much damage have happened? Locations where the damage is high? This could aid the government and insurance companies in speedy and reasonable payouts to the individuals affected. The satellite imagery from remote sensing is adequately used in crop loss and damage assessments. The combination of microwave (all weather capabilities) and optical satellite data from senitnel-1 and sentinel-2 respectively with 10 meters spatial resolution has huge potential for crops monitoring at parcel to regional level.
Below is the use case developed by SourceTrace™ for crop damage assessment due to super cyclonic storm Amphan. This deadly tropical cyclone caused widespread damage in Eastern India, West Bengal to be specific, and also Bangladesh in May 2020.
Disclaimer: The flood inundation based on 21st and 22nd May 2020 Sentinel-1 satellite imagery. Inundation can vary in other dates. Also the ground validation is not done.
The microwave (sentinel-1) data used to extract the potential flood area and the optical (sentinel-2) data used to map the standing crops in the months of May 2020. We have used the combination of image analytics and machine learning tools in image processing and extraction potential flood area and standing crops. The Geographic Information System (GIS) spatial analysis used in area estimation of storm flood area and standing crops affected.
District wise potential flood area and cropland affected in West Bengal
area in hectares
| Districts | Potential Flood Area | Cropland affected |
|---|---|---|
| EAST MEDINIPUR | 54,394 | 29,681 |
| WEST MEDINIPUR | 24,781 | 16,843 |
| BARDDHAMAN | 5,288 | 4,187 |
| HAORA | 4,913 | 2,550 |
| CHUNCHURA (HUGLI) | 3,706 | 3,306 |
| ALIPUR (SOUTH TWENTY FOUR PARGANAS) | 5,181 | 2,568 |
| BARASAT (NORTH TWENTY FOUR PARGANAS) | 3,750 | 1,737 |
| KRISHNANAGAR (NADIA) | 1,463 | 1,075 |
| BAHARAMPUR | 431 | 81 |
| BALURGHAT | 200 | 18 |
| KOLKATA (CAPITAL) | 119 | 115 |
| Total | 104,225 | 62,165 |
Disclaimer: The flood inundation based on 21st and 22nd May 2020 Sentinel-1 satellite imagery. Inundation can vary in other dates. Also the ground validation is not done.
The parts of Sylhet and Dhaka divisions were flooded due to heavy rain during 21st May 2020. The Sylhet and Dhaka received 55 mm/24 hrs and 67 mm/24 hrs respectively (Bangladesh Meteorological Department).
Division wise potential flood area and cropland affected in Bangladesh
area in hectares
| Divisions | Potential Flood Area | Cropland affected |
|---|---|---|
| SYLHET | 80,844 | 25,709 |
| DHAKA | 62,775 | 42,753 |
| BARISAL | 42,753 | 26,389 |
| KHULNA | 4,913 | 2,550 |
| CHITTAGONG | 15,738 | 12,213 |
| RAJSHAHI | 6,663 | 3,274 |
| RANGPUR | 650 | 361 |
| Total | 225,881 | 120,603 |
Further with this database at farm level standing crop and the area affected due to flooding could be estimated.
SourceTrace is a SaaS (Software as a Service) company that focuses on sustainable agriculture and empowerment of farmers. SourceTrace’s advanced technology platform DATAGREEN provides comprehensive solutions to manage all aspects of the agricultural value chain.
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