{"id":66651,"date":"2015-03-18T11:00:40","date_gmt":"2015-03-18T11:00:40","guid":{"rendered":"http:\/\/www.esri.com\/arcgis-blog\/products\/product\/uncategorized\/new-learn-arcgis-lesson-no-dumping-drains-to-ocean\/"},"modified":"2018-03-26T21:04:41","modified_gmt":"2018-03-26T21:04:41","slug":"new-learn-arcgis-lesson-no-dumping-drains-to-ocean","status":"publish","type":"blog","link":"https:\/\/www.esri.com\/arcgis-blog\/products\/analytics\/analytics\/new-learn-arcgis-lesson-no-dumping-drains-to-ocean","title":{"rendered":"New Learn ArcGIS Lesson: No Dumping – Drains to Ocean"},"author":4331,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","format":"standard","meta":{"_acf_changed":false,"_searchwp_excluded":""},"categories":[23341,22771,23051],"tags":[24981,22821,24811,23391,28881,24831,24841,23081,23101,35951],"industry":[],"product":[36551],"class_list":["post-66651","blog","type-blog","status-publish","format-standard","hentry","category-analytics","category-natural-resources","category-water","tag-hydro","tag-oceans-and-maritime","tag-pollution","tag-spatial-analytics","tag-stormwater","tag-trace","tag-trace-downstream","tag-utilities","tag-water-utilities","tag-watersheds","product-arcgis-online"],"acf":{"short_description":"By Aileen Buckley, Esri Cartographer\n\nA new try-it-yourself-for-free project been posted on the Learn ArcGIS web site! In the No Dumping ...","flexible_content":[{"acf_fc_layout":"content","content":"

By Aileen Buckley, Esri Cartographer<\/strong><\/p>\n

\"NoA new try-it-yourself-for-free project been posted on the Learn ArcGIS web site<\/a>! In the No Dumping – Drains to Ocean project<\/a>, you\u2019ll learn how to find the area that contributes to a storm drain and the route that pollutants will take if they are dumped or washed into the drain. You’ll find the upstream drainage area, called a watershed, for a storm drain near Blackman Elementary School in Tennessee. Then you\u2019ll find the downstream flow path, called a trace, to where it empties into the Gulf of Mexico. Knowing how to find these, you can experiment to find the watersheds and flow paths for other storm drain locations.<\/p>\n

Project Workflow:\u00a0Create a point layer for the storm drain using Map Notes. Create a default \u00a0watershed. Note that it is small, so rerun the analysis using the search distance setting to find the larger upstream watershed. Explore the map to see where the watershed is located. Create\u00a0the downstream flow path (trace). Examine the table to see its length in miles. Add a field and calculate it to show the length in kilometers. Explore the map to see where the trace flows.<\/p>\n