{"id":1448,"date":"2014-02-04T15:12:20","date_gmt":"2014-02-04T15:12:20","guid":{"rendered":"http:\/\/www.michiganseagrant.org\/lessons\/?page_id=1448"},"modified":"2021-09-24T14:38:46","modified_gmt":"2021-09-24T14:38:46","slug":"dangerous-currents-dont-get-swept-away","status":"publish","type":"page","link":"https:\/\/www.michiganseagrant.org\/lessons\/lessons\/by-broad-concept\/physical-science\/dangerous-currents-dont-get-swept-away\/","title":{"rendered":"Dangerous Currents: Don\u2019t Get Swept Away"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" class=\"alignright wp-image-1594 \" src=\"https:\/\/www.michiganseagrant.org\/lessons\/wp-content\/uploads\/sites\/3\/2014\/02\/Dave-Benjamin-Dec-26-2010-160-168x300.jpg\" alt=\"Surfing on the Great Lakes\" width=\"160\" height=\"285\" srcset=\"https:\/\/www.michiganseagrant.org\/lessons\/wp-content\/uploads\/sites\/3\/2014\/02\/Dave-Benjamin-Dec-26-2010-160-168x300.jpg 168w, https:\/\/www.michiganseagrant.org\/lessons\/wp-content\/uploads\/sites\/3\/2014\/02\/Dave-Benjamin-Dec-26-2010-160-573x1024.jpg 573w, https:\/\/www.michiganseagrant.org\/lessons\/wp-content\/uploads\/sites\/3\/2014\/02\/Dave-Benjamin-Dec-26-2010-160.jpg 671w\" sizes=\"(max-width: 160px) 100vw, 160px\" \/>It was the day after Christmas 2010. Dave Benjamin, a Great Lakes surfer, was winter surfing on Lake Michigan with some friends when he got into trouble. The leash to his surfboard failed, and he was out in the water, getting hit by wave after wave and was caught in a current. Water had breached his wetsuit. He was losing energy.<\/p>\n<p>\u201cI have been swimming in Lake Michigan all of my life,\u201d said Benjamin. \u201cAll of that experience went out the window when panic set in. I came to a point where I was writing myself off. I came to the resolution that <i>I\u2019m not going home today<\/i>.\u201d<\/p>\n<p>This lesson explores dangerous currents, including rip currents that commonly occur throughout the Great Lakes.<\/p>\n<p><b>Grade Level<\/b>: 9-12<sup>th<\/sup> grades<\/p>\n<p><strong>Performance Expectations:<\/strong><\/p>\n<ul>\n<li>HS-PS4.1 Waves and Their Applications in Technologies for Information Transfer: Use mathematical representations to support a claim regarding relationships among the frequency, wavelength and speed of waves traveling in various media.<\/li>\n<li>HS-ESS3.1 Earth and Human Activity: Construct an explanation based on evidence for how availability of natural resources, occurrence of natural hazards and changes in climate have influenced human activity.<\/li>\n<li>MS-ESS2-2 Earth\u2019s Systems: Construct an explanation based on evidence for how geoscience processes have changed Earth\u2019s surface at varying time and spatial scales.<\/li>\n<li>MS-ESS3-2 Earth and Human Activity: Analyze and interpret data on natural hazards to forecast future catastrophic events and inform the development of technologies to mitigate their effects.<\/li>\n<\/ul>\n<p>For alignment, see: <a href=\"https:\/\/www.michiganseagrant.org\/lessons\/wp-content\/uploads\/sites\/3\/2019\/04\/DontGetSweptAway_NGSS-Summary-FINAL-AP.pdf\">Don&#8217;t Get Swept Away NGSS Summary<\/a><\/p>\n<h2><\/h2>\n<h2>Lesson Objectives<\/h2>\n<ul>\n<li>Learn about the different types of dangerous currents and where they occur.<\/li>\n<li>Understand who is most at risk.<\/li>\n<li>Analyze data about rescues and deaths related to dangerous currents.<\/li>\n<li>Explain actions that will help prevent drowning.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h2>Background<\/h2>\n<div id=\"attachment_1597\" style=\"width: 203px\" class=\"wp-caption alignleft\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-1597\" class=\"wp-image-1597 size-medium\" src=\"https:\/\/www.michiganseagrant.org\/lessons\/wp-content\/uploads\/sites\/3\/2014\/02\/Dave-Benjamin-with-surf-board-193x300.jpg\" alt=\"surfer standing with surf board\" width=\"193\" height=\"300\" srcset=\"https:\/\/www.michiganseagrant.org\/lessons\/wp-content\/uploads\/sites\/3\/2014\/02\/Dave-Benjamin-with-surf-board-193x300.jpg 193w, https:\/\/www.michiganseagrant.org\/lessons\/wp-content\/uploads\/sites\/3\/2014\/02\/Dave-Benjamin-with-surf-board.jpg 343w\" sizes=\"(max-width: 193px) 100vw, 193px\" \/><p id=\"caption-attachment-1597\" class=\"wp-caption-text\">Dave Benjamin with his surf board.<\/p><\/div>\n<p>While Dave Benjamin\u2019s story may not resonate at first \u2014 he was surfing in December, after all \u2014 it has all of the elements of a warmer-weather drowning, including exhaustion and panic after getting caught up in a current. Something he learned <i>before<\/i> he got in the water saved his life.<\/p>\n<p>And getting caught in a dangerous current in the Great Lakes happens more than you might think \u2014 to strong swimmers and water novices alike. Since 2002, there have been more than 180 deaths and more than 400 rescues directly attributed to currents in the Great Lakes.<\/p>\n<p>These are conservative numbers \u2014 it is likely that currents contribute to many more deaths and rescues in the Great Lakes than are reported. Many of the deaths happened near structures, like piers and breakwalls, making these areas the most hazardous places.<\/p>\n<p>Dave Benjamin was near a breakwall when he got into trouble in Lake Michigan. He was losing energy.<\/p>\n<p>&#8220;I was very close to the break wall, but I knew immediately that I couldn&#8217;t use it as an escape because it was\u00a0jagged rocks covered in ice,&#8221; he said. &#8220;The waves were smashing my board into the wall and I feared that I would be next to get smashed into the wall.&#8221;<\/p>\n<div id=\"attachment_1599\" style=\"width: 310px\" class=\"wp-caption alignright\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-1599\" class=\"wp-image-1599 size-medium\" src=\"https:\/\/www.michiganseagrant.org\/lessons\/wp-content\/uploads\/sites\/3\/2014\/02\/Dangerous-Currents-breakwall-Dec-26-2010-150-300x153.jpg\" alt=\"breakwall\" width=\"300\" height=\"153\" srcset=\"https:\/\/www.michiganseagrant.org\/lessons\/wp-content\/uploads\/sites\/3\/2014\/02\/Dangerous-Currents-breakwall-Dec-26-2010-150-300x153.jpg 300w, https:\/\/www.michiganseagrant.org\/lessons\/wp-content\/uploads\/sites\/3\/2014\/02\/Dangerous-Currents-breakwall-Dec-26-2010-150-768x390.jpg 768w, https:\/\/www.michiganseagrant.org\/lessons\/wp-content\/uploads\/sites\/3\/2014\/02\/Dangerous-Currents-breakwall-Dec-26-2010-150-1024x521.jpg 1024w, https:\/\/www.michiganseagrant.org\/lessons\/wp-content\/uploads\/sites\/3\/2014\/02\/Dangerous-Currents-breakwall-Dec-26-2010-150-1080x549.jpg 1080w, https:\/\/www.michiganseagrant.org\/lessons\/wp-content\/uploads\/sites\/3\/2014\/02\/Dangerous-Currents-breakwall-Dec-26-2010-150.jpg 1200w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><p id=\"caption-attachment-1599\" class=\"wp-caption-text\">A breakwall in the Great Lakes.<\/p><\/div>\n<p>He was reviewing his life, he said, when an article about drowning came back to him. It was then he did what saved his life: essentially nothing. He stopped struggling against the current, flipped over and began to float on his back, which gave him time to catch his breath and think. He was eventually able to make it back to shore, taking turns resting and swimming. He flipped, floated and followed his way to safety.<\/p>\n<p>To learn more about the science behind dangerous currents, see: <a title=\"Dangerous Currents 101\" href=\"http:\/\/www.michiganseagrant.org\/lessons\/lessons\/by-broad-concept\/physical-science\/dangerous-currents-101\/\">Dangerous Currents 101 Lesson<\/a><\/p>\n<p><strong>Characteristics<\/strong><\/p>\n<p>When examining past current-related incidents, there are several factors that may play a part, including the following:<\/p>\n<ul>\n<li>Wind is most likely toward the shore, at 25 mph or less.<\/li>\n<li>The most commonly observed wave height range was 3 to 4 feet. This is likely because this is the range of wave heights that most people feel comfortable swimming in, and it is the start of when rip current speeds become dangerous. However, 5 to 6 foot wave heights were also common.<\/li>\n<li>The most common weather pattern observed during rip current incidents was the passage of a cold front. This is to be expected, as cold fronts are frequently accompanied by high winds and waves, which are more supportive of rip current development.<\/li>\n<\/ul>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-14425 size-full\" src=\"https:\/\/www.michiganseagrant.org\/lessons\/wp-content\/uploads\/sites\/3\/2019\/07\/wave-heights-during-current-incidents-2018.png\" alt=\"wave heights during current incidents\" width=\"976\" height=\"579\" srcset=\"https:\/\/www.michiganseagrant.org\/lessons\/wp-content\/uploads\/sites\/3\/2019\/07\/wave-heights-during-current-incidents-2018.png 976w, https:\/\/www.michiganseagrant.org\/lessons\/wp-content\/uploads\/sites\/3\/2019\/07\/wave-heights-during-current-incidents-2018-300x178.png 300w, https:\/\/www.michiganseagrant.org\/lessons\/wp-content\/uploads\/sites\/3\/2019\/07\/wave-heights-during-current-incidents-2018-768x456.png 768w\" sizes=\"(max-width: 976px) 100vw, 976px\" \/><\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-14426 size-full\" src=\"https:\/\/www.michiganseagrant.org\/lessons\/wp-content\/uploads\/sites\/3\/2019\/07\/wave-periods-during-current-incidents-2018.png\" alt=\"wave periods during current incidents\" width=\"1020\" height=\"619\" srcset=\"https:\/\/www.michiganseagrant.org\/lessons\/wp-content\/uploads\/sites\/3\/2019\/07\/wave-periods-during-current-incidents-2018.png 1020w, https:\/\/www.michiganseagrant.org\/lessons\/wp-content\/uploads\/sites\/3\/2019\/07\/wave-periods-during-current-incidents-2018-300x182.png 300w, https:\/\/www.michiganseagrant.org\/lessons\/wp-content\/uploads\/sites\/3\/2019\/07\/wave-periods-during-current-incidents-2018-768x466.png 768w\" sizes=\"(max-width: 1020px) 100vw, 1020px\" \/><\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-14427 size-full\" src=\"https:\/\/www.michiganseagrant.org\/lessons\/wp-content\/uploads\/sites\/3\/2019\/07\/current-related-incidents-by-year-2018.png\" alt=\"current related incidents by year\" width=\"1296\" height=\"737\" srcset=\"https:\/\/www.michiganseagrant.org\/lessons\/wp-content\/uploads\/sites\/3\/2019\/07\/current-related-incidents-by-year-2018.png 1296w, https:\/\/www.michiganseagrant.org\/lessons\/wp-content\/uploads\/sites\/3\/2019\/07\/current-related-incidents-by-year-2018-300x171.png 300w, https:\/\/www.michiganseagrant.org\/lessons\/wp-content\/uploads\/sites\/3\/2019\/07\/current-related-incidents-by-year-2018-768x437.png 768w, https:\/\/www.michiganseagrant.org\/lessons\/wp-content\/uploads\/sites\/3\/2019\/07\/current-related-incidents-by-year-2018-1024x582.png 1024w, https:\/\/www.michiganseagrant.org\/lessons\/wp-content\/uploads\/sites\/3\/2019\/07\/current-related-incidents-by-year-2018-1080x614.png 1080w\" sizes=\"(max-width: 1296px) 100vw, 1296px\" \/><\/p>\n<p>\u00a0(<em>Source: <a href=\"https:\/\/www.weather.gov\/iwx\/beach_season_summaries\">National Weather Service &#8211; Northern Indiana Office<\/a><\/em>)<\/p>\n<h2>Can You Tell if There\u2019s Danger Lurking?<\/h2>\n<p>Strong winds can change quickly and produce severe conditions on any of the Great Lakes \u2014 severe enough to sink even large ships. For example, some wave heights can reach more than 23 feet (7 meters). Such extreme events cause waves so high, most people know to stay out of the water. But what if the waves are 3 to 5 feet tall? While the lower waves may seem more inviting, they can often relate to areas where dangerous currents may be present.<\/p>\n<p>&nbsp;<\/p>\n<div id=\"attachment_1508\" style=\"width: 636px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-1508\" class=\"wp-image-1508 \" src=\"https:\/\/www.michiganseagrant.org\/lessons\/wp-content\/uploads\/sites\/3\/2014\/02\/GrandHaven-Rip-2010.jpg\" alt=\"Rip currents and other dangerous currents often form in or near the &quot;surf zone&quot; which typically is where people are swimming.\" width=\"626\" height=\"579\" srcset=\"https:\/\/www.michiganseagrant.org\/lessons\/wp-content\/uploads\/sites\/3\/2014\/02\/GrandHaven-Rip-2010.jpg 957w, https:\/\/www.michiganseagrant.org\/lessons\/wp-content\/uploads\/sites\/3\/2014\/02\/GrandHaven-Rip-2010-300x277.jpg 300w, https:\/\/www.michiganseagrant.org\/lessons\/wp-content\/uploads\/sites\/3\/2014\/02\/GrandHaven-Rip-2010-768x710.jpg 768w\" sizes=\"(max-width: 626px) 100vw, 626px\" \/><p id=\"caption-attachment-1508\" class=\"wp-caption-text\">Rip currents and other dangerous currents often form in or near the &#8220;surf zone&#8221; which typically is where people are swimming.<\/p><\/div>\n<p>As seen in the image to the right (provided by Guy Meadows, a rip current researcher based at Michigan Technological University), currents happen in what is called the &#8220;surf zone.&#8221; They can also show up when the waves are not too high, 3-4 feet, but approaching the shore quickly. Currents in the Great Lakes can be particularly treacherous because Great Lakes storms and waves can build with alarming speed, giving a swimmer in trouble less time to recover between waves.<\/p>\n<p><b>Signs of Rip Currents:<\/b><\/p>\n<ul>\n<li>Low spots along the shore, can often be found near river mouths<\/li>\n<li>A break in the incoming wave pattern<\/li>\n<li>A channel of churning, choppy water<\/li>\n<li>A line of foam or debris moving seaward<\/li>\n<li>A difference in water color<\/li>\n<\/ul>\n<p>Some beaches have a sign system to signal when the conditions may be ripe for dangerous currents. Yet, every year, people die because they ignored warnings, like yellow or red warning flags and water safety signs. Please pay attention to the signs!<\/p>\n<p>&nbsp;<\/p>\n<h2><b>Who\u2019s at Risk?<\/b><\/h2>\n<p>The short answer: You are.<\/p>\n<p>The longer answer: Any swimmer can get caught in a current. However, according to National Weather Service statistics, between 2002-2013 a high percentage of the rescues and fatalities involved young males (aged 24 and under). Of the 21 rescues and recoveries that took place in 2013, 11 were for males, while 7 were females and 3 the sex was not reported.<\/p>\n<p>Since 2002, nearly 600 incidents directly related to dangerous currents have been collected. As of 2013, an estimated 47 percent of those incidents included males, while only 22 percent included females and in 31 percent of the incidents, the sex of the victim was not reported.<\/p>\n<p>Research has shown that younger males may be more at risk because of their involvement in higher-risk situations and the influence of peer pressure, like jumping off of piers and breakwalls. Structures present multiple hazards, like rocks and persistent currents that often prevent swimmers from reaching safety.<\/p>\n<p>While younger males may be at the top of the risk pyramid, other statistics stand out as well. For example, many of the rescues and fatalities can be older adults, who have gone in the water to help save a child. Children are also at risk. This can be further explored in the activity below: Who is Drowning in the Great Lakes?<\/p>\n<h2><b>What Happens?<\/b><\/h2>\n<p>People drown when they are unable to keep themselves afloat and get to safety or wait for help. Often a combination of fear, panic, exhaustion and lack of swimming skills contribute to death or near drownings. However, as noted at the beginning of this lesson, even experienced swimmers can get into trouble, depending on the conditions at the time.<\/p>\n<h2><b>ACTIVITIES<\/b><\/h2>\n<ul>\n<li><a title=\"Activity: Who is drowning in the Great Lakes?\" href=\"http:\/\/www.michiganseagrant.org\/lessons\/lessons\/by-broad-concept\/physical-science\/dangerous-currents-dont-get-swept-away\/activity-drowning-great-lakes\/\">Who is Drowning in the Great Lakes?<\/a><i> <\/i><\/li>\n<\/ul>\n<p><b>Summary:<i> <\/i><\/b>Using Great Lakes incident statistics from the National Weather Service, students use real data to research rescues and deaths in the Great Lakes.<\/p>\n<p><b>Time:<\/b> One 50-minute class period<\/p>\n<ul>\n<li><a title=\"Activity: What does Drowning Look Like?\" href=\"http:\/\/www.michiganseagrant.org\/lessons\/lessons\/by-broad-concept\/physical-science\/dangerous-currents-dont-get-swept-away\/activity-drowning-look-like\/\">What Does Drowning Look Like? <\/a><\/li>\n<\/ul>\n<p><b>Summary:<\/b> Students explore and discuss how to recognize the signs of drowning and how to help someone else.<\/p>\n<p><b>Time:<\/b> One 50-minute class period<\/p>\n<h2><b>Lesson Sources<\/b><\/h2>\n<ul>\n<li>Michigan Technological University, Guy Meadows<\/li>\n<li>National Weather Service, Marquette Office, Megan Dodson and Keith Cooley<\/li>\n<li>Great Lake Surf Rescue, Bob Pratt and Dave Benjamin<\/li>\n<li>Michigan Department of Environmental Quality, Matt Warner and Rhonda Wycheck<\/li>\n<li>Michigan Department of Natural Resources, Mike Evanoff<\/li>\n<\/ul>\n<p><b>\u00a0<\/b><b>Resources<\/b><\/p>\n<ul>\n<li>Great Lakes Water Safety Consortium website: <a href=\"https:\/\/www.greatlakeswatersafety.org\/\">www.greatlakeswatersafety.org<\/a><\/li>\n<li><a href=\"https:\/\/www.michiganseagrant.org\/dcd\/dcdsearch.php\">Dangerous Currents Database<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>It was the day after Christmas 2010. Dave Benjamin, a Great Lakes surfer, was winter surfing on Lake Michigan with some friends when he got into trouble. The leash to his surfboard failed, and he was out in the water, getting hit by wave after wave and was caught in a current. Water had breached [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":21,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","_relevanssi_hide_post":"","_relevanssi_hide_content":"","_relevanssi_pin_for_all":"","_relevanssi_pin_keywords":"","_relevanssi_unpin_keywords":"","_relevanssi_related_keywords":"","_relevanssi_related_include_ids":"","_relevanssi_related_exclude_ids":"","_relevanssi_related_no_append":"","_relevanssi_related_not_related":"","_relevanssi_related_posts":"","_relevanssi_noindex_reason":"","_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":"","_links_to":"","_links_to_target":""},"class_list":["post-1448","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.michiganseagrant.org\/lessons\/wp-json\/wp\/v2\/pages\/1448","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.michiganseagrant.org\/lessons\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.michiganseagrant.org\/lessons\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.michiganseagrant.org\/lessons\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.michiganseagrant.org\/lessons\/wp-json\/wp\/v2\/comments?post=1448"}],"version-history":[{"count":9,"href":"https:\/\/www.michiganseagrant.org\/lessons\/wp-json\/wp\/v2\/pages\/1448\/revisions"}],"predecessor-version":[{"id":14630,"href":"https:\/\/www.michiganseagrant.org\/lessons\/wp-json\/wp\/v2\/pages\/1448\/revisions\/14630"}],"up":[{"embeddable":true,"href":"https:\/\/www.michiganseagrant.org\/lessons\/wp-json\/wp\/v2\/pages\/21"}],"wp:attachment":[{"href":"https:\/\/www.michiganseagrant.org\/lessons\/wp-json\/wp\/v2\/media?parent=1448"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}