{"id":2028,"date":"2021-01-22T16:21:00","date_gmt":"2021-01-23T00:21:00","guid":{"rendered":"https:\/\/dornsife.usc.edu\/news\/stories\/wetlands-have-saved-australia-27-billion-in-storm-damage-over-the-past-five-decades\/"},"modified":"2024-05-14T17:21:49","modified_gmt":"2024-05-15T00:21:49","slug":"wetlands-prevent-storm-damage","status":"publish","type":"post","link":"https:\/\/dornsife.usc.edu\/news\/stories\/wetlands-prevent-storm-damage\/","title":{"rendered":"Wetlands have saved Australia $27 billion in storm damage over the past five decades"},"content":{"rendered":"\n\n\n    \n            \n\n  \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--article-hero \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--article-hero\"\n    \n      >\n\n    \n<div class=\"inner-wrapper\">\n          \n<div class=\"f--field f--image\">\n\n    \n    \n    \n    \n    \n    \n              \n      <img\n                            data-src=\"https:\/\/dornsife.usc.edu\/news\/wp-content\/uploads\/sites\/7\/2023\/04\/story-3389-768x432.jpg\"\n          data-srcset=\"https:\/\/dornsife.usc.edu\/news\/wp-content\/uploads\/sites\/7\/2023\/04\/story-3389-768x432.jpg 768w\"          data-sizes=\"(min-width:1200px) 75vw, (min-width:768px) 83vw, 100vw\"          class=\"lazyload\"\n        \n                  alt=\"Wetlands have saved Australia $27 billion in storm damage over the past five decades\"\n        \n        \n                                      \/>\n\n    \n    \n  \n  \n\n<\/div>\n  \n      <div class=\"image-caption\">\n          \n<div class=\"f--field f--description\">\n\n    \n  Wetlands such as mangroves, swamps, lakes and lagoons bear the brunt of storm damage. (Photo: David Clode.)\n\n\n<\/div>\n    <\/div>\n  \n  <div class=\"text-wrapper\">\n          <nav aria-label=\"Breadcrumb\" class=\"breadcrumbs\">\n        <ul>\n                      <li><a href=\"\/news\/stories\/\">News<\/a><\/li>\n                      <li><a href=\"\/news\/stories\/\/?category=faculty\">Faculty<\/a><\/li>\n                  <\/ul>\n      <\/nav>\n    \n              \n<div class=\"f--field f--page-title\">\n\n    \n  <h1>Wetlands have saved Australia $27 billion in storm damage over the past five decades<\/h1>\n\n\n<\/div>\n    \n          <div class=\"subtitle\">\n            \n<div class=\"f--field f--description\">\n\n    \n  A study shows that Australia\u2019s wetlands take the brunt of a cyclone&#8217;s power, preventing billions in damage. <strong>[4 min read]<\/strong>\n\n\n<\/div>\n      <\/div>\n    \n           <strong class=\"author-field\"><span >By<\/span><a href=\"mailto:communication@dornsife.usc.edu\">Obadiah Mulder and Ida Kubiszewski<\/a><\/strong>\n    \n          <span class=\"post-date-field\">January 22, 2021<\/span>\n      <\/div>\n<\/div>\n\n\n  <\/div><\/div>\n\n  \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--social-share \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--social-share\"\n    \n      >\n\n    \n  <div class=\"content-wrapper\">\n    <span class=\"a2a_kit a2a_kit_size_32 addtoany_list\" style=\"line-height: 32px;\">\n      <span class=\"title\">\n        Share\n      <\/span>\n                        <a class=\"a2a_button_copy_link\" target=\"_blank\" href=\"\/#copy_link\" rel=\"nofollow noopener\" title=\"Link\">\n            <span class=\"a2a_svg a2a_s__default a2a_s_copy_link\">\n              <svg height=\"19\" viewBox=\"0 0 19 19\" width=\"19\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"m7.43475275 9.52380952-2.17490843 2.26076008c-1.08745421 1.058837-1.68841575 2.518315-1.68841575 4.0350275 0 1.5167124.60096154 2.9475732 1.68841575 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xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"m8.14285714 9.42857143c-.17142857 0-.34285714 0-.51428571.08571428l7.28571427 6.34285719c.3428572.2571428.6857143.2571428.9428572 0l7.2857142-6.34285719c-.0857142-.08571428-.2571428-.08571428-.4285714-.08571428zm-1.28571428 1.11428567v.1714286 8.5714286c0 .6857143.6 1.2857143 1.28571428 1.2857143h14.57142856c.6857143 0 1.2857143-.6 1.2857143-1.2857143v-8.5714286c0-.0857143 0-.0857143 0-.1714286l-7.2 6.3428572c-.7714286.6857143-1.8857143.6857143-2.6571429 0z\" fill-rule=\"evenodd\" transform=\"translate(-6 -9)\"\/><\/svg>\n            <\/span>\n            <span class=\"a2a_label visually-hidden\">Email<\/span>\n          <\/a>\n                  <\/span>\n  <\/div>\n\n  <\/div><\/div>\n \n\n\n\n  \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--rich-text \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--rich-text\"\n    \n      >\n\n    \n      \n<div class=\"f--field f--wysiwyg\">\n\n    \n  <p>Australia is in the midst of tropical cyclone season. As we write, a <a href=\"https:\/\/www.abc.net.au\/news\/2021-01-20\/cyclone-lucas-wa-warning-tourists-urged-to-leave\/13075018\" target=\"_blank\">cyclone is forming<\/a> off Western Australia&rsquo;s Pilbara coast, and earlier in the week Queenslanders were bracing for a cyclone in the state&rsquo;s <a href=\"https:\/\/www.abc.net.au\/news\/2021-01-18\/qld-tropical-cyclone-kimi-category-one-cairns-townsville\/13066832\" target=\"_blank\">far north<\/a> (which thankfully, didn&rsquo;t hit).<\/p>\n<p>Australia has always experienced cyclones. But here and around the world, climate change means the cyclone threat <a href=\"https:\/\/www.pnas.org\/content\/117\/22\/11975\" target=\"_blank\">is growing<\/a> &ndash; and so too is the potential damage bill. Disadvantaged populations are often most at risk.<\/p>\n<p>Our <a href=\"https:\/\/www.sciencedirect.com\/science\/article\/pii\/S2212041620301479\" target=\"_blank\">recent research<\/a> shows 54 cyclones struck Australia in the 50 years between 1967 and 2016, causing about A$3 billion in damage. We found the damages would have totalled approximately A$30 billion, if not for coastal wetlands.<\/p>\n<p>Wetlands such as mangroves, swamps, lakes and lagoons bear the brunt of much storm damage to coast, helping protect us and our infrastructure. But over the past 300 years, <a href=\"https:\/\/www.publish.csiro.au\/mf\/mf14173\" target=\"_blank\">85% of the world&rsquo;s wetland area<\/a> has been destroyed. It&rsquo;s clear we must urgently preserve the precious little wetland area we have left.<\/p>\n<p><strong>A critical buffer<\/strong><\/p>\n<p>National disasters cost Australia as much as <a href=\"http:\/\/australianbusinessroundtable.com.au\/assets\/reports\/media-release-nov-11.pdf\" target=\"_blank\">A$18 billion each year<\/a> on average. About one-quarter of this is <a href=\"https:\/\/www.sciencedirect.com\/science\/article\/abs\/pii\/S221242091630440X\" target=\"_blank\">due to<\/a> cyclone damage.<\/p>\n<p>Wetlands can mitigate cyclone and hurricane damage, by absorbing storm surges and slowing winds. For example in August 2020, Hurricane Laura hit the United States&rsquo; midwest. Massive damage was predicted, including a 6.5-metre storm surge extending 65 kilometres inland.<\/p>\n<p>However the surge was one metre at most &ndash; largely because the storm drove straight into a <a href=\"https:\/\/www.theguardian.com\/us-news\/2020\/oct\/02\/weatherwatch-hurricane-laura-storm-surge-that-went-astray\" target=\"_blank\">massive wetland that absorbed most of the predicted flood<\/a>.<\/p>\n<p>In Australia, wetlands are lost through intentional infilling or drainage for mosquito control, or to create land for infrastructure and agriculture. They&rsquo;re also lost due to pollution and upstream changes to water flows.<\/p>\n<p><strong>Putting a price on cyclone protection<\/strong><\/p>\n<p>Our research set out to determine the financial value of the storm protection provided by Australia&rsquo;s wetlands.<\/p>\n<p>We examined the 54 cyclones that struck Australia in the five decades to 2016. We gathered data including:<\/p>\n<ul>\n<li>physical damage wrought in each storm swath (or storm path)<\/li>\n<li>gross domestic product (GDP) in the storm&rsquo;s path<\/li>\n<li>maximum windspeed during each storm, which helps predict damage<\/li>\n<li>total area of wetlands in each swath.<\/li>\n<\/ul>\n<p>Using a powerful type of statistics called Bayesian analysis, we estimated the extent to which GDP, windspeed and wetland area affected total damage. This allowed us to estimate damage caused in the absence of wetlands.<\/p>\n<p>We found for every hectare of wetland, about A$4,200 per year in cyclone damage was avoided. This means the A$3 billion in cyclone damage over the past 50 years would have totalled approximately A$30 billion, if not for coastal wetlands.<\/p>\n<hr>\n<p><em> <strong> Read more: <a href=\"https:\/\/theconversation.com\/restoring-a-gem-in-the-murray-darling-basin-the-success-story-of-the-winton-wetlands-140337\">Restoring a gem in the Murray-Darling Basin: the success story of the Winton Wetlands<\/a> <\/strong> <\/em><\/p>\n<hr>\n<p>Importantly, the percentage of damage averted falls rapidly as wetland area decreases. And the protection afforded by a single hectare of wetland increases drastically if there are fewer other wetlands in the path of the storm. This makes protecting remaining wetland even more critical.<\/p>\n<p>If the average cyclone path in Australia were to contain around 30,000 hectares of wetlands, it would avert about 90% of potential storm damage. If the wetland area dropped to 3,000 hectares, only about 30% of damage would be averted.<\/p>\n<p>Climate change is making cyclones worse. By 2050, Australia&rsquo;s annual damage bill could be as <a href=\"https:\/\/www.sciencedirect.com\/science\/article\/pii\/S2212041620301479\" target=\"_blank\">high as A$39 billion<\/a>, assuming current levels of wetlands are maintained.<\/p>\n<p>Seawalls and other artificial structures can be built along the coast to protect from storms. However, research in China has found wetlands are more cost-effective and efficient than man-made structures at <a href=\"https:\/\/www.sciencedirect.com\/science\/article\/pii\/S0048969718347648\" target=\"_blank\">preventing cyclone damage<\/a>.<\/p>\n<p>Unlike man-made structures, wetlands maintain themselves. Their only &ldquo;cost&rdquo; is the opportunity cost of not being able to use the land for something else.<\/p>\n<p><strong>Keeping wetlands safe<\/strong><\/p>\n<p>According to recent analysis by the authors, which is currently under peer review, global wetlands provide US$447 billion (A$657 billion) worth of protection from storms each year.<\/p>\n<p>Of course, wetlands provide benefits beyond storm protection. They store carbon, regulate our climate and control flooding. They also absorb waste including pollutants and carbon, provide animal habitat and places for human recreation.<\/p>\n<p>Wetlands are an incredibly important resource. It&rsquo;s critical we protect them from development and keep them healthy, so they can continue to provide vital services.<\/p>\n<hr>\n<p><em> <strong> Read more: <a href=\"https:\/\/theconversation.com\/our-new-model-shows-australia-can-expect-11-tropical-cyclones-this-season-146318\">Our new model shows Australia can expect 11 tropical cyclones this season<\/a> <\/strong> <\/em><\/p>\n<hr>\n<p><em>This story is part of a series The Conversation is running on the nexus between disaster, disadvantage and resilience. You can read the rest of the stories <a href=\"https:\/\/theconversation.com\/au\/topics\/disaster-and-resilience-series-97537\">here<\/a>.<\/em><!-- Below is The Conversation's page counter tag. Please DO NOT REMOVE. --><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/counter.theconversation.com\/content\/153638\/count.gif?distributor=republish-lightbox-basic\" alt=\"The Conversation\" style=\"border: none !important; box-shadow: none !important; margin: 0 !important; max-height: 1px !important; max-width: 1px !important; min-height: 1px !important; min-width: 1px !important; opacity: 0 !important; outline: none !important; padding: 0 !important; text-shadow: none !important;\" width=\"1\" height=\"1\"><!-- End of code. If you don't see any code above, please get new code from the Advanced tab after you click the republish button. The page counter does not collect any personal data. More info: https:\/\/theconversation.com\/republishing-guidelines --><\/p>\n<p><span><a href=\"https:\/\/theconversation.com\/profiles\/obadiah-mulder-1199437\">Obadiah Mulder<\/a>, PhD Candidate in Computational Biology, <em><a href=\"https:\/\/theconversation.com\/institutions\/university-of-southern-california-1265\">University of Southern California<\/a><\/em> and <a href=\"https:\/\/theconversation.com\/profiles\/ida-kubiszewski-142545\">Ida Kubiszewski<\/a>, Associate Professor, <em><a href=\"https:\/\/theconversation.com\/institutions\/crawford-school-of-public-policy-australian-national-university-3292\">Crawford School of Public Policy, Australian National University<\/a><\/em><\/span><\/p>\n<p>This article is republished from <a href=\"https:\/\/theconversation.com\">The Conversation<\/a> under a Creative Commons license. Read the <a href=\"https:\/\/theconversation.com\/wetlands-have-saved-australia-27-billion-in-storm-damage-over-the-past-five-decades-153638\">original article<\/a>.<\/p>\n\n\n\n<\/div>\n\n\n  <\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>A study shows that Australia\u2019s wetlands take the brunt of a cyclone&#8217;s power, preventing billions in damage. <strong>[4 min read]<\/strong><\/p>\n","protected":false},"author":52,"featured_media":2031,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[10],"tags":[83],"class_list":["post-2028","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-faculty","tag-the-conversation"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Wetlands have saved Australia $27 billion in storm damage 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