{"id":2697,"date":"2014-06-23T10:51:04","date_gmt":"2014-06-23T09:51:04","guid":{"rendered":"https:\/\/www.ultraflux.net\/mesure-debit-reserve-2-2\/"},"modified":"2018-06-14T14:52:14","modified_gmt":"2018-06-14T12:52:14","slug":"minimum-acceptable-flow-measurement","status":"publish","type":"page","link":"https:\/\/www.ultraflux.net\/en\/applications\/rivers-and-natural-environments\/minimum-acceptable-flow-measurement\/","title":{"rendered":"Minimum acceptable flow measurement"},"content":{"rendered":"<ul class=\"gallery\"><li class=\"active image-1\"><p><img width=\"1000\" height=\"1000\" src=\"https:\/\/www.ultraflux.net\/wp-content\/uploads\/2014\/06\/Mesure-de-d\u00e9bit-r\u00e9serv\u00e9-de-La-Vire.jpg\" class=\"attachment-large size-large\" alt=\"\" decoding=\"async\" loading=\"lazy\" srcset=\"https:\/\/www.ultraflux.net\/wp-content\/uploads\/2014\/06\/Mesure-de-d\u00e9bit-r\u00e9serv\u00e9-de-La-Vire.jpg 1000w, https:\/\/www.ultraflux.net\/wp-content\/uploads\/2014\/06\/Mesure-de-d\u00e9bit-r\u00e9serv\u00e9-de-La-Vire-150x150.jpg 150w, https:\/\/www.ultraflux.net\/wp-content\/uploads\/2014\/06\/Mesure-de-d\u00e9bit-r\u00e9serv\u00e9-de-La-Vire-300x300.jpg 300w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/p><\/li><\/ul><nav id=\"gallery-nav\"><ul class=\"gallery-nav\"><li class=\"active image-1\"><p><\/p><\/li><\/ul><\/nav>\n<div class=\"block\"><div class=\"title\">BACKGROUND<\/div><div class=\"text\"><div class=\"text-container\"><p>\nMinimum acceptable flow is the minimum flow rate to be maintained in a water course perpendicular to a structure to preserve biological balance and water usage downstream. Consequently, sampling authorisations are limited. Minimum acceptable flow is not a hydrological concept; it is a regulatory requirement in Europe.<\/p>\n<\/div><\/div><\/div>\n<div class=\"block\"><div class=\"title\">DESCRIPTION OF THE APPLICATION<\/div><div class=\"text\"><div class=\"text-container\"><p>\nTo meet this regulatory requirement, we were asked to install a flow meter on the Vire River, slightly upstream of the &#8220;La Maugeauti\u00e8re&#8221; pumping station. The water course at this point is around 7 to 8m wide. During low water periods, the depth of the water barely exceeds 30cm. Furthermore, the only available place to install the flow meter is located just after a large bend.<\/p>\n<\/div><\/div><\/div>\n<div class=\"block\"><div class=\"title\">EQUIPMENT USED<\/div><div class=\"text\"><div class=\"text-container\"><\/p>\n<table>\n<tbody>\n<tr>\n<td colspan=\"2\">FLOW METER<\/td>\n<\/tr>\n<tr>\n<td>Uf 322 CO converter<\/td>\n<td>SM 1527 wetted probes<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/www.ultraflux.net\/applications\/rivers-and-natural-environments\/minimum-acceptable-flow-measurement\/uf-821-co3-3\/\" rel=\"attachment wp-att-7708\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-7708\" src=\"https:\/\/www.ultraflux.net\/wp-content\/uploads\/2018\/06\/uf-821-co3-2.jpg\" alt=\"\" width=\"220\" height=\"233\" \/><\/a><\/td>\n<td><a href=\"https:\/\/www.ultraflux.net\/applications\/rivers-and-natural-environments\/minimum-acceptable-flow-measurement\/sm-1527-3\/\" rel=\"attachment wp-att-7710\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-7710\" src=\"https:\/\/www.ultraflux.net\/wp-content\/uploads\/2018\/06\/SM-1527-3-1.jpg\" alt=\"\" width=\"200\" height=\"251\" \/><\/a><\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\"><a href=\"https:\/\/www.ultraflux.net\/en\/products\/flowmeters-free-surface-flows\/uf-821-corv\/\">\u00a0Uf 821 CO<\/a><\/td>\n<td>They make it possible to create two interwoven measurement chords.<br \/>\nTheir clever installation means that they are well protected and require little maintenance.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>The equipment is completed with a pressure level measuring device.<\/p>\n<p>\n<\/div><\/div><\/div>\n<div class=\"block\"><div class=\"title\">RESULTS<\/div><div class=\"text\"><div class=\"text-container\"><p>\nAccurate and continuous measurement, as expected by our client.<\/p>\n<\/div><\/div><\/div>\n<div class=\"block\"><div class=\"title\">ADVANTAGES<\/div><div class=\"text\"><div class=\"text-container\"><p>\nHere, the ultrasound transit time flow measurement means that:<\/p>\n<ul>\n<li>The full measurement scope can be covered, from low to high water levels,<\/li>\n<li>Reliable and mean measurements can be taken across the entire length of the chord, even though the velocity profile is not stable during low water periods.<\/li>\n<\/ul>\n<p>\n<\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":3,"featured_media":0,"parent":5739,"menu_order":5,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.1 - 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