Lal Preet, Prakash Aniket, Kumar Amit
Department of Geoinformatics, Central University of Jharkhand, Ranchi, 835205 India.
Nat Hazards (Dordr). 2020;104(2):1947-1952. doi: 10.1007/s11069-020-04233-z. Epub 2020 Aug 24.
The present study focused on the recent flood inundation (July 2020) that occurred in the lower Indo-Gangetic-Brahmaputra plains (IGBP) using concurrent C-band Sentinel-1A Synthetic Aperture Radar images in Google Earth Engine. The study exhibited that a substantial proportion of IGBP (40,929 km) was inundated primarily in Bangladesh (9.09% of the total inundation), Assam (8.99%), and Bihar (6.29%) during June-July 2020. The severe impact of flood inundation was observed in croplands (4.41% of the total cropland), followed by settlements (20.98% of the total settlements) that affected a large population (~ 10,046,262) in IGBP. The prevailing COVID-19 pandemic has debilitated the efforts of mitigation and responses to flooding risks. The study necessitates adopting an integrated, multi-hazard, multi-stakeholder approach with an emphasis on self-reliance of the community for sustenance with local resources and practices.
本研究利用谷歌地球引擎中同步的C波段哨兵-1A合成孔径雷达图像，聚焦于2020年7月发生在印度河—恒河—雅鲁藏布江下游平原（IGBP）的近期洪水淹没情况。研究表明，2020年6月至7月期间，IGBP的很大一部分区域（40,929平方公里）被淹没，主要集中在孟加拉国（占总淹没面积的9.09%）、阿萨姆邦（8.99%）和比哈尔邦（6.29%）。在农田（占总耕地面积的4.41%）中观察到洪水淹没的严重影响，其次是定居点（占定居点总数的20.98%），这影响了IGBP地区大量人口（约10,046,262人）。当前的新冠疫情削弱了减轻洪水风险和应对洪水的努力。该研究有必要采用一种综合的、多灾害、多利益相关方的方法，强调社区依靠当地资源和做法实现自给自足。
