{"id":46919,"date":"2022-06-21T19:35:07","date_gmt":"2022-06-21T19:35:07","guid":{"rendered":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=46919"},"modified":"2022-06-23T18:05:58","modified_gmt":"2022-06-23T18:05:58","slug":"viirs-flood-product-over-bangladesh-and-india","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/46919","title":{"rendered":"VIIRS composite flood products over Bangladesh and India"},"content":{"rendered":"\n<p>The five-day composite of the VIIRS flood product is just one flood product that can be viewed in <a href=\"https:\/\/floods.ssec.wisc.edu\/?products=RIVER-FLDglobal-composite.75,RIVER-FLDglobal-composite1.100&amp;center=19.973348786110613,84.83642578125001&amp;zoom=5&amp;width=1181&amp;height=732&amp;basemap=satellite&amp;labels=google&amp;view=leaflet&amp;timeproduct=RIVER-FLDglobal-composite&amp;timespan=-6t&amp;animationspeed=50\">RealEarth<\/a>. VIIRS is an instrument aboard SNPP and NOAA-20, which are low earth orbiting satellites. This means that while only two daytime observations may be retrieved per day over a given region, the spatial resolution of 375-m is quite highly resolved. VIIRS flood composites, such as the five-day composite, provide the &#8220;maximal flood extent&#8221; during flood events. More information about VIIRS and other satellite flood products can be found <a href=\"https:\/\/www.ssec.wisc.edu\/flood-map-demo\/.\">here<\/a>.<\/p>\n\n\n\n<p>In areas of Bangladesh and northwest India, persistent rains have caused recent heavy flooding. <a href=\"https:\/\/www.bbc.com\/news\/world-asia-india-61670666\">Millions of people have already been displaced and the flooding is forecast to continue.<\/a> The VIIRS five-day flood product composite over a six-day time period can be seen below, with the 7-day CMORPH2 satellite-derived precipitation accumulation product. Comparing the images, the spatial placement of flooding with accumulated precipitation coincides well. <\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2022\/06\/viirs_flood_gif.gif\"><img loading=\"lazy\" decoding=\"async\" width=\"1200\" height=\"657\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2022\/06\/viirs_flood_gif.gif\" alt=\"\" class=\"wp-image-46924\" \/><\/a><figcaption>Daily images of the five-day VIIRS flood product composite from 6-15-2022 to 6-20-2022 over Bangladesh and Northeastern India. The product estimates the severity of river flooding over the last five days [click to enlarge].<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2022\/06\/precip_accum_0621-1024x560.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"560\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2022\/06\/precip_accum_0621-1024x560.jpg\" alt=\"\" class=\"wp-image-46926\" srcset=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2022\/06\/precip_accum_0621-1024x560.jpg 1024w, https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2022\/06\/precip_accum_0621-300x164.jpg 300w, https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2022\/06\/precip_accum_0621-768x420.jpg 768w, https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2022\/06\/precip_accum_0621.jpg 1440w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption>CMORPH2 accumulate precipitation from 6-20-2022 over the same area. This product represents the approximate precipitation (rainfall) accumulation over the last seven days [click to enlarge].<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-video\"><video height=\"2140\" style=\"aspect-ratio: 2356 \/ 2140;\" width=\"2356\" controls muted src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2022\/06\/HIMAWARI-8_AHI_bangladesh_20220619.mp4\"><\/video><figcaption>Convective storms occurring over Bangladesh and Northeast India on 6-19-2022 from 00:00Z to 15:50Z as seen from the Advanced Himawari Imager (AHI). This animation was created using CSPP&#8217;s <a href=\"http:\/\/cimss.ssec.wisc.edu\/csppgeo\/geo2grid_v1.0.0.html\">geo2grid<\/a> software. <\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>The five-day composite of the VIIRS flood product is just one flood product that can be viewed in RealEarth. VIIRS is an instrument aboard SNPP and NOAA-20, which are low earth orbiting satellites. This means that while only two daytime observations may be retrieved per day over a given region, the spatial resolution of 375-m [&hellip;]<\/p>\n","protected":false},"author":27,"featured_media":46929,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[16,35,48],"tags":[],"class_list":["post-46919","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-heavy-rain-flooding","category-hydrology","category-viirs"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/46919","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/users\/27"}],"replies":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/comments?post=46919"}],"version-history":[{"count":7,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/46919\/revisions"}],"predecessor-version":[{"id":46970,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/46919\/revisions\/46970"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/46929"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=46919"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=46919"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=46919"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}