{"id":161,"date":"2023-11-23T12:33:01","date_gmt":"2023-11-23T12:33:01","guid":{"rendered":"https:\/\/www.bgs.ac.uk\/groundwater\/data\/groundwater-levels\/didmarton-1\/"},"modified":"2025-12-17T13:42:56","modified_gmt":"2025-12-17T13:42:56","slug":"didmarton-1","status":"publish","type":"page","link":"https:\/\/www.bgs.ac.uk\/groundwater\/data\/groundwater-levels\/didmarton-1\/","title":{"rendered":"Didmarton 1"},"content":{"rendered":"\t\t\t<section class=\"hero-section hero-section-with-social\">\n\t\t\t\t\t\t\t\t<div class=\"hero-info-wrap\">\n\t\t\t\t\t<div class=\"container\">\n\t\t\t\t\t\t<div class=\"row\">\n\t\t\t\t\t\t\t<div class=\"col-12\">\n\t\t\t\t\t\t\t\t<div class=\"hero-info\">\n\t\t\t\t\t\t\t\t\t<h1>Didmarton 1<\/h1>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\n\t\t\t<div class=\"social-wrap social-wrap-inline-them\">\n\t\t\t\t<div class=\"sea-background-f\">\n\t\t\t\t\t<span>Share this article<\/span><a target=\"_blank\"  href=\"https:\/\/www.facebook.com\/sharer\/sharer.php?u=https:\/\/www.bgs.ac.uk\/groundwater\/data\/groundwater-levels\/didmarton-1\/\"><span class=\"icon-facebook\"><span class=\"hidden\">Facebook<\/span><\/span><\/a><a target=\"_blank\"  href=\"https:\/\/twitter.com\/intent\/tweet?text=Didmarton%201&#038;url=https:\/\/www.bgs.ac.uk\/groundwater\/data\/groundwater-levels\/didmarton-1\/\"><span class=\"icon-twitter\"><span class=\"hidden\">Twitter<\/span><\/span><\/a><a   onclick=\"javascript:void( (function() {var e=document.createElement('script' );e.setAttribute('type','text\/javascript' );e.setAttribute('charset','UTF-8' );e.setAttribute('src','\/\/assets.pinterest.com\/js\/pinmarklet.js?r='+Math.random()*99999999);document.body.appendChild(e)})());\"  href=\"javascript:void(0);\"><span class=\"icon-pinterest\"><span class=\"hidden\">Pinterest<\/span><\/span><\/a><a target=\"_blank\"  href=\"https:\/\/wa.me?text=https:\/\/www.bgs.ac.uk\/groundwater\/data\/groundwater-levels\/didmarton-1\/\"><span class=\"icon-whatsapp\"><span class=\"hidden\">WhatsApp<\/span><\/span><\/a><a   href=\"mailto:?subject=Didmarton%201&#038;body=%20(https:\/\/www.bgs.ac.uk\/groundwater\/data\/groundwater-levels\/didmarton-1\/)\"><span class=\"icon-mail\"><span class=\"hidden\">Email<\/span><\/span><\/a><a href=\"#\" data-copy=\"https:\/\/www.bgs.ac.uk\/groundwater\/data\/groundwater-levels\/didmarton-1\/\" class=\"copy-url-on-click\"><span class=\"icon-link\"><span class=\"hidden\">Copy Link<\/span><\/span><\/a><\/div><\/div>\t\t\t\t\t\t\t<\/section>\n\t\t\t\n\n\n<section class=\"wp-block-bgs-blocks-content-container content-section\"><div class=\"container\"><div class=\"row\"><div class=\"col-12\">\n<p class=\"wp-block-paragraph\">This well is used to monitor water levels in the confined Jurassic-aged <a href=\"https:\/\/webapps.bgs.ac.uk\/lexicon\/lexicon.cfm?pub=INO\">Inferior Oolite Group<\/a> aquifer to the west of Malmesbury, Gloucestershire, England.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.bgs.ac.uk\/about-bgs\/contact-us\/\">BGS Enquiries<\/a> can help you to access data from the National Groundwater Level Archive (NGLA) for this well.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Hydrograph<\/h2>\n\n\n\n<figure class=\"img-central\">\n  <img decoding=\"async\" src=\"https:\/\/resources.bgs.ac.uk\/groundwater\/hydrographs\/bgsfigs\/DIDMARTON 1-allyears.webp\" loading=\"lazy\" class=\"img-fluid\" alt=\"\"> \n<figcaption>\n        Groundwater level timeseries over the full observational record for Didmarton 1. National Groundwater Level Archive, \u00a9 UKRI \u2013 BGS\n    <\/figcaption>\n<\/figure>\n\n<figure class=\"img-central\">\n  <img decoding=\"async\" src=\"https:\/\/resources.bgs.ac.uk\/groundwater\/hydrographs\/bgsfigs\/DIDMARTON 1-recentyears.webp\" loading=\"lazy\" class=\"img-fluid\" alt=\"\"> \n<figcaption>\n        Groundwater level timeseries for the last 5 years of available data for Didmarton 1. National Groundwater Level Archive, \u00a9 UKRI \u2013 BGS\n    <\/figcaption>\n<\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Information about the well<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Hydrogeological setting<\/h3>\n\n\n\t\t\t<div id=\"wysiwyg-656-block_42ce86327809459f16385dafabe4d562\" class=\"  \" >\n\t\t\t<div class=\"col-12 responsive-table\"><table>\n<tbody>\n<tr>\n<th style=\"width: 99.6575%;height: 23px;background-color: #002e40\" colspan=\"2\"><span style=\"color: #ffffff\">Didmarton 1<\/span><\/th>\n<\/tr>\n<tr>\n<td><strong>Wellmaster ID<\/strong><\/td>\n<td>ST88\/62A<\/td>\n<\/tr>\n<tr>\n<td><strong>NGR<\/strong><\/td>\n<td>3827 1874<\/td>\n<\/tr>\n<tr>\n<td><strong>Datum<\/strong><\/td>\n<td>113.8\u00a0m AOD<\/td>\n<\/tr>\n<tr>\n<th style=\"width: 99.6575%;height: 23px;background-color: #002e40\" colspan=\"2\"><span style=\"color: #ffffff\">Monitoring details<\/span><\/th>\n<\/tr>\n<tr>\n<td><strong>Type<\/strong><\/td>\n<td>Groundwater level<\/td>\n<\/tr>\n<tr>\n<td><strong>Aquifer<\/strong><\/td>\n<td>Jurassic limestone<\/td>\n<\/tr>\n<tr>\n<td><strong>Confinement<\/strong><\/td>\n<td>Confined<\/td>\n<\/tr>\n<tr>\n<td><strong>Depth<\/strong><\/td>\n<td>112.1 m<\/td>\n<\/tr>\n<tr>\n<th style=\"width: 99.6575%;height: 23px;background-color: #002e40\" colspan=\"2\"><span style=\"color: #ffffff\">Record<\/span><\/th>\n<\/tr>\n<tr>\n<td><strong>Monitored by<\/strong><\/td>\n<td>EA South East<\/td>\n<\/tr>\n<tr>\n<td><strong>Records commence<\/strong><\/td>\n<td>1977<\/td>\n<\/tr>\n<tr>\n<td><strong>Records end<\/strong><\/td>\n<td>Active<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/div>\n\t\t\t<\/div>\n\t\t\t\n\n\n<p class=\"wp-block-paragraph\">The borehole is located near the outcrop of the junction of the <a href=\"https:\/\/webapps.bgs.ac.uk\/lexicon\/lexicon.cfm?pub=FMB\">Forest Marble Formation<\/a> and the <a href=\"https:\/\/webapps.bgs.ac.uk\/lexicon\/lexicon.cfm?pub=CFDO\">Chalfield Oolite Formation<\/a>, both part of the overlying <a href=\"https:\/\/webapps.bgs.ac.uk\/lexicon\/lexicon.cfm?pub=GOG\">Great Oolite Group<\/a> aquifer. Beneath this, the borehole penetrates the <a href=\"https:\/\/webapps.bgs.ac.uk\/lexicon\/lexicon.cfm?pub=FE\">Fuller&#8217;s Earth Formation<\/a>, the Inferior Oolite Group and about 5.5&nbsp;m of the <a href=\"https:\/\/webapps.bgs.ac.uk\/lexicon\/lexicon.cfm?pub=BDS\">Bridport Sand Formation<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The Inferior Oolite aquifer is confined by clays within the Fuller&#8217;s Earth Formation. The underlying Bridport Sand Formation has a high storage coefficient and is generally in hydraulic continuity with the Inferior Oolite Group limestones.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Well or borehole construction<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The borehole has a diameter of 101&nbsp;mm to 85&nbsp;m depth, below which it narrows to 86&nbsp;mm. It has 51&nbsp;mm casing to 80&nbsp;m depth.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Hydrograph response<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The hydrograph shows a smooth sinusoidal pattern. The water level exhibits large seasonal fluctuations but always remains above the base of the confining beds. The maximum water level appears to be constrained.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Acknowledgements<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Groundwater level data are provided to the NGLA by the Environment Agency (EA), Natural Resources Wales &#8211; Cyfoeth Naturiol Cymru (NRW), the Scottish Environment Protection Agency (SEPA) and, for Northern Ireland, the Department for Infrastructure &#8211; Rivers and the Northern Ireland Environment Agency.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Further information about these monitoring networks can be found on these pages:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/timeseriesdoc.sepa.org.uk\/\" target=\"_blank\" rel=\"noreferrer noopener\">Scotland<\/a>&nbsp;(SEPA)<\/li>\n\n\n\n<li><a href=\"https:\/\/environment.data.gov.uk\/hydrology\/landing\" target=\"_blank\" rel=\"noreferrer noopener\">England<\/a>&nbsp;(Defra)&nbsp;<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Contact<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Please&nbsp;<a href=\"https:\/\/www.bgs.ac.uk\/about-bgs\/contact-us\/\">contact BGS Enquiries<\/a>&nbsp;for further information.<\/p>\n<\/div><\/div><\/div><\/section>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":3,"featured_media":0,"parent":30,"menu_order":11,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_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":"1","_relevanssi_noindex_reason":"","footnotes":""},"tags":[],"class_list":["post-161","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - 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