{"id":23005,"date":"2015-08-21T15:40:18","date_gmt":"2015-08-21T19:40:18","guid":{"rendered":"http:\/\/www.fondriest.com\/news\/?p=23005"},"modified":"2021-11-10T16:40:34","modified_gmt":"2021-11-10T20:40:34","slug":"usgs-intermittent-streams-study-finds-correlation-between-climate-flow-regime","status":"publish","type":"post","link":"https:\/\/www.fondriest.com\/news\/usgs-intermittent-streams-study-finds-correlation-between-climate-flow-regime.htm","title":{"rendered":"USGS Intermittent Streams Study Finds Correlation Between Climate, Flow Regime"},"content":{"rendered":"<p>Of all the factors that influence a watershed\u2019s health, intermittent streams might be the easiest to forget. After all, they do come and go without much warning \u2014 but it\u2019s important to keep in mind that these ephemeral waterways do play important roles in regulating watershed hydrology, from supporting ecosystems to recharging aquifers. <\/p>\n<p>A new study from the U.S. Geological Survey analyzed the effects of climate variability on intermittent streams, finding that streamflow regimes in these waterways closely reflects historical climate patterns. The results of the study are published online in River Research and Applications. <\/p>\n<p>\u201cA lot of literature is based on perennial streams; they\u2019re widely monitored,\u201d said Ken Eng, a research hydrologist with the USGS and lead author of the paper. \u201cStreams that cease to flow during certain times of the year tend not to be studied as well. I thought it was about time to take a look at them, as many as I could.\u201d <\/p>\n<p>Eng and his co-authors studied streamflow data across 265 intermittent streams monitored by the USGS over the last 60 years. The researchers split the streams into five different types, each of which had at least a 40-year record of monitoring data and little influence from human sources. They looked at different factors contributing to periods of no flow, including precipitation, soil moisture conditions, snowmelt and evaporation. <\/p>\n<div id=\"attachment_23004\" style=\"width: 630px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-23004\" src=\"https:\/\/www.fondriest.com\/news\/wp-content\/uploads\/2015\/08\/intermittent_stream_comparison-1024x273.jpg\" alt=\"Cedar Creek (shown in August 2013 and 2012, left to right) is a typical intermittent stream with flow rates changing drastically from year to year. (Credit: USGS)\" width=\"620\" height=\"165\" class=\"size-large wp-image-23004\" \/><p id=\"caption-attachment-23004\" class=\"wp-caption-text\">Cedar Creek (shown in August 2013 and 2012, left to right) is a typical intermittent stream with flow rates changing drastically from year to year. (Credit: USGS)<\/p><\/div>\n<p>Analysis revealed that while the duration of wet and dry periods contributed significantly to streamflow regimes, the intensity or volume of rainfall actually had little impact. <\/p>\n<p>Over the relatively limited period examined by the study, the researchers failed to find any long-term changes in precipitation, and were unable to identify any major temporal trends in the streams\u2019 behavior. Or, as Eng put it: \u201cThese streams haven\u2019t changed very much over time.\u201d<\/p>\n<p>But then again, neither have precipitation patterns over the last six decades. However, the strong correlation between precipitation duration and streamflow regimes suggests that a changing climate could seriously affect the formation and flow of these streams in the future. <\/p>\n<p>\u201cIf the climate projections are correct, we will see changes,\u201d Eng said. <\/p>\n<p>Aside from recharging aquifers, Eng said that intermittent streams help distribute organic matter and snowmelt, and provide a shallow habitat where fish can lay their eggs. <\/p>\n<p>Eng plans to continue this research by examining flow regimes on a regional or national scale, and determining \u201chow direct human modifications are impacting intermittent flows.\u201d<\/p>\n<p>\u201cTrying to understand the natural variations of these intermittent streams is kind of the first step,\u201d he said.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A new USGS study analyzing the effects of climate variability on intermittent streams finds their flow regimes closely reflect historical climate patterns.<\/p>\n","protected":false},"author":18,"featured_media":23003,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5,49],"tags":[60,103,348,98],"class_list":["post-23005","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-featured-articles","category-rivers-streams","tag-featured","tag-news-2","tag-rivers-streams","tag-streamflow"],"remote_post_permalink":false,"remote_post_featured_image":false,"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>USGS Intermittent Streams Study Finds Correlation Between Climate, Flow Regime<\/title>\n<meta name=\"description\" content=\"A new USGS study analyzing the effects of climate variability on intermittent streams finds their flow regimes closely reflect historical climate patterns.\" \/>\n<meta name=\"robots\" content=\"index, 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(Credit: USGS)"},{"@type":"WebSite","@id":"https:\/\/www.fondriest.com\/news\/#website","url":"https:\/\/www.fondriest.com\/news\/","name":"Environmental Monitor","description":"Application and technology news for environmental professionals","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.fondriest.com\/news\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/www.fondriest.com\/news\/#\/schema\/person\/26b12e34fff78267b1ccc6c845bed88f","name":"Alex Card","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/68f516a6f621e1e7c3ee835fdfdc36b6b92df79ffd9b51b04a9562f56733b5c4?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/68f516a6f621e1e7c3ee835fdfdc36b6b92df79ffd9b51b04a9562f56733b5c4?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/68f516a6f621e1e7c3ee835fdfdc36b6b92df79ffd9b51b04a9562f56733b5c4?s=96&d=mm&r=g","caption":"Alex Card"},"sameAs":["http:\/\/fondriest.com\/news","AlexCard"],"url":"https:\/\/www.fondriest.com\/news\/author\/alexcard"}]}},"_links":{"self":[{"href":"https:\/\/www.fondriest.com\/news\/wp-json\/wp\/v2\/posts\/23005","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.fondriest.com\/news\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fondriest.com\/news\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.fondriest.com\/news\/wp-json\/wp\/v2\/users\/18"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fondriest.com\/news\/wp-json\/wp\/v2\/comments?post=23005"}],"version-history":[{"count":3,"href":"https:\/\/www.fondriest.com\/news\/wp-json\/wp\/v2\/posts\/23005\/revisions"}],"predecessor-version":[{"id":33564,"href":"https:\/\/www.fondriest.com\/news\/wp-json\/wp\/v2\/posts\/23005\/revisions\/33564"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.fondriest.com\/news\/wp-json\/wp\/v2\/media\/23003"}],"wp:attachment":[{"href":"https:\/\/www.fondriest.com\/news\/wp-json\/wp\/v2\/media?parent=23005"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fondriest.com\/news\/wp-json\/wp\/v2\/categories?post=23005"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fondriest.com\/news\/wp-json\/wp\/v2\/tags?post=23005"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}