Remote Sensing Application in Mapping Agricultural Crop Areas and Monitoring Rice Maturity
Science, Technology & Public Policy
Volume 4, Issue 1, June 2020, Pages: 34-43
Received: Apr. 17, 2020;
Accepted: May 5, 2020;
Published: May 19, 2020
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Nguyen Quoc Hiep, Center for Water Resources Software, Vietnam Academy for Water Resources, Hanoi, Vietnam
Nguyen Anh Hung, Center for Water Resources Software, Vietnam Academy for Water Resources, Hanoi, Vietnam
Pham Quang Loi, Center for Water Resources Software, Vietnam Academy for Water Resources, Hanoi, Vietnam
Pham Thi Thu Hien, Center for Water Resources Software, Vietnam Academy for Water Resources, Hanoi, Vietnam
Nguyen Duy Khanh, Center for Water Resources Software, Vietnam Academy for Water Resources, Hanoi, Vietnam
Climate change has evolved in an unpredictable trend and droughts have occurred more and more severely in the central provinces of Vietnam. Determining the irrigated area and water requirement for various crops and the growth stage of each crop is an urgent need as water resources for irrigation are getting scarce year by year. This research examines the application of Sentinel-2 and Sentinel-1 images to map crop areas and identify the current development stage of paddy rice areas. The images are collected and pre-processed from 2017 to 2018 for Ha Tinh Province in Vietnam. The Maximus Likelihood method is used to interpret Sentinel-2 imagery for mapping agricultural crop distribution status. The research presents a new approach for identifying rice maturity using the Sentinel-1 image series. The Overall Accuracy (OA) and Kappa coefficient methods are used to evaluate the generated maps of the agricultural crop’s distribution status. This study shows the relationship between the Sentinel-1 VH band and the growth of rice. From the image bands, we could calculate the slope of the line correlating between the VH backscattering value and the growth time of rice. Along with the local planting schedule, rice life cycle, and simple deduction, we could determine the rice growth stage at each time of image acquisition. The results identifying the rice maturity progression are illustrated for Cam Hoa commune in Cam Xuyen district and Thach Hoi commune in Thach Ha district, Ha Tinh Province.
Nguyen Quoc Hiep,
Nguyen Anh Hung,
Pham Quang Loi,
Pham Thi Thu Hien,
Nguyen Duy Khanh,
Remote Sensing Application in Mapping Agricultural Crop Areas and Monitoring Rice Maturity, Science, Technology & Public Policy.
Vol. 4, No. 1,
2020, pp. 34-43.
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