{"id":373101,"date":"2020-10-11T14:19:13","date_gmt":"2020-10-11T21:19:13","guid":{"rendered":"https:\/\/www.esri.com\/about\/newsroom\/?post_type=arcwatch&p=373101"},"modified":"2020-10-26T14:46:22","modified_gmt":"2020-10-26T21:46:22","slug":"make-your-own-flood-map-in-a-minute","status":"publish","type":"arcwatch","link":"https:\/\/www.esri.com\/about\/newsroom\/arcwatch\/make-your-own-flood-map-in-a-minute","title":{"rendered":"Make Your Own Flood Map in a Minute"},"content":{"rendered":"","protected":false},"author":1172,"featured_media":0,"menu_order":0,"template":"","format":"standard","meta":{"_acf_changed":false,"sync_status":"","episode_type":"","audio_file":"","podmotor_file_id":"","podmotor_episode_id":"","castos_file_data":"","cover_image":"","cover_image_id":"","duration":"","filesize":"","filesize_raw":"","date_recorded":"","explicit":"","block":"","itunes_episode_number":"","itunes_title":"","itunes_season_number":"","itunes_episode_type":"","footnotes":"","_links_to":"","_links_to_target":""},"categories":[275822,10392],"tags":[151652,163382,8012,289952,137952],"arcwatch_issues":[471382],"class_list":["post-373101","arcwatch","type-arcwatch","status-publish","format-standard","hentry","category-arcgis-living-atlas-of-the-world","category-arcgis-online","tag-arcgis-living-atlas-of-the-world","tag-arcgis-online","tag-flooding","tag-floods","tag-weather","arcwatch_issues-november-2020","arcwatch_sections-the-tip"],"acf":{"short_description":"Esri technology evangelist Bern Szukalski uses content from the Living Atlas to show you how you can make your own flood map in a minute.","pdf":{"host_remotely":false,"file":"","file_url":""},"flexible_content":[{"acf_fc_layout":"content","content":"Use ArcGIS Online and ArcGIS Living Atlas of the World to Create a Map of Flood Locations <\/strong>\r\n\r\nHurricane season, which in the United States officially starts June 1 and ends November 30, often causes devastating floods in both coastal and inland areas.\r\n\r\nFor example, coastal Alabama and the Florida Panhandle experienced massive flooding in September when\u00a0Hurricane Sally<\/a>\u00a0made landfall in Gulf Shores, Alabama. The storm brought wind gusts up to 123 mph and torrential rains."},{"acf_fc_layout":"image","image":373201,"image_position":"center","orientation":"horizontal","hyperlink":""},{"acf_fc_layout":"content","content":"According to the National Oceanic and Atmospheric Administration (NOAA), flooding is the major threat for inland populations. Flash flooding can occur in the blink of an eye due to intense rainfall, often accumulating from some distance away from where the flooding occurs. Flooding along rivers and streams can last for many days after a storm has passed.\r\n\r\nMake a Flood Map<\/strong>\r\n\r\nArcGIS Living Atlas of the World<\/a>\u00a0includes authoritative live feeds and other content that helps you learn more about current and predicted flood conditions. Follow these steps to make your own flood map in a minute.\r\n\r\nStep 1:<\/strong>\u00a0 Sign in to your account and open Map Viewer, click Add, then Browse Living Atlas Layers."},{"acf_fc_layout":"image","image":373251,"image_position":"center","orientation":"horizontal","hyperlink":""},{"acf_fc_layout":"content","content":"Step 2:<\/strong> Enter \u201cflood\u201d in search to locate matching layers from ArcGIS Living Atlas. Locate the\u00a0Live Stream Gauges (Flooding)\u00a0layer and click (+) to add it to the map."},{"acf_fc_layout":"image","image":373331,"image_position":"center","orientation":"horizontal","hyperlink":""},{"acf_fc_layout":"content","content":"Note:<\/strong>\u00a0To learn more about any layer, click the layer title or card to view the item details."},{"acf_fc_layout":"image","image":373351,"image_position":"center","orientation":"horizontal","hyperlink":""},{"acf_fc_layout":"content","content":"Note:<\/strong>\u00a0To learn more about any layer, click the layer title or card to view the item details.\r\n\r\n "},{"acf_fc_layout":"image","image":373381,"image_position":"center","orientation":"horizontal","hyperlink":""},{"acf_fc_layout":"content","content":"From the\u00a0Live Stream Gauges (Flooding)<\/a>\u00a0item details, you will see \u00a0that the layer shows real-time stream gauge measurements and displays the gauges currently reporting\u00a0 flooding. The layer also includes information about the current water flow and the flood stage. \u00a0You also will see information about the source of the data in the layer.\r\n\r\nStep 3:<\/strong>\u00a0 Return to search again using the term \u201cflood\u201d and scroll down to locate the\u00a0National Water Model (Hourly)\u00a0layer and click (+) to add it to the map."},{"acf_fc_layout":"image","image":373401,"image_position":"center","orientation":"horizontal","hyperlink":""},{"acf_fc_layout":"content","content":"From the\u00a0National Water Model (Hourly Forecast)<\/a>\u00a0item details, you will see that the layer presents a time-enabled model from the National Weather Service that forecasts streamflow volume and velocity for the entire United States. The model predicts the flow in every river reach<\/a> of the National Hydrography Dataset.\r\n\r\nStep 4:<\/strong> Adjust the layer order to display the gauges on top of the streams. In Content, select the Live Stream Gauges layer and drag and drop it above the National Water Model layer."},{"acf_fc_layout":"image","image":373421,"image_position":"center","orientation":"horizontal","hyperlink":""},{"acf_fc_layout":"content","content":"In just a few clicks, you will have created a map showing current flood conditions and hourly forecasts for streams. The map below has been zoomed to the Gulf Coast area where you can see the effects of the flooding that was caused by Hurricane Sally.\r\n\r\n "},{"acf_fc_layout":"image","image":373441,"image_position":"center","orientation":"horizontal","hyperlink":""},{"acf_fc_layout":"content","content":"View larger image<\/a>\r\n\r\nSince the National Water Model (Hourly Forecast) layer is time-enabled, a time slider appears at the bottom of the map. Using the time slider you can (a) play or pause the animation, (b) step forward or backward in time intervals, or (c) adjust time settings to set the playback speed, time span, and time display.\r\n\r\n "},{"acf_fc_layout":"image","image":373461,"image_position":"center","orientation":"horizontal","hyperlink":""},{"acf_fc_layout":"content","content":"You also can click a stream to identify it and view forecast flow and deviation from normal flow for the period selected using the time slider.\r\n\r\n "},{"acf_fc_layout":"image","image":373481,"image_position":"center","orientation":"horizontal","hyperlink":""},{"acf_fc_layout":"content","content":"To learn more about the current flow and status, click a stream gauge. Click More info in the pop-up to view details about the gauging station."},{"acf_fc_layout":"image","image":373501,"image_position":"center","orientation":"horizontal","hyperlink":""},{"acf_fc_layout":"content","content":"Improve Your Map<\/strong>\r\n\r\nExperiment with a variety of basemaps to see which one you like best. You can alter layer transparency and symbols to emphasize the content you want. Add additional layers, such as\u00a0Recent Weather Radar Imagery<\/a>,\u00a0USA Weather Local Storm reports<\/a>, or\u00a0USA Weather Watches and Warnings<\/a>\u00a0for additional context.\r\n\r\n \r\n\r\nMore information\r\n\r\nFor more information, see:\r\n