{"id":3994,"date":"2026-02-23T12:48:14","date_gmt":"2026-02-23T11:48:14","guid":{"rendered":"https:\/\/sotrafageo.com\/?p=3994"},"modified":"2026-02-23T12:48:14","modified_gmt":"2026-02-23T11:48:14","slug":"alvatech-geomembrane-highest-reservoir-iberian-peninsula","status":"publish","type":"post","link":"https:\/\/sotrafageo.com\/en\/alvatech-geomembrane-highest-reservoir-iberian-peninsula\/","title":{"rendered":"USE OF ALVATECH 2.00 MM GEOMEMBRANE IN THE HIGHEST STORAGE RESERVOIR IN THE IBERIAN PENINSULA"},"content":{"rendered":"<ul>\n<li><strong><span class=\"a_GcMg font-feature-liga-off font-feature-clig-off font-feature-calt-off text-decoration-none text-strikethrough-none\">Location: <\/span><\/strong><span class=\"a_GcMg font-feature-liga-off font-feature-clig-off font-feature-calt-off text-decoration-none text-strikethrough-none\">Sierra Nevada \u2013 Monachil (Granada), Spain<\/span><\/li>\n<li class=\"cvGsUA direction-ltr align-start para-style-body\"><strong><span class=\"a_GcMg font-feature-liga-off font-feature-clig-off font-feature-calt-off text-decoration-none text-strikethrough-none\">Installed Geomembrane: <\/span><\/strong><span class=\"a_GcMg font-feature-liga-off font-feature-clig-off font-feature-calt-off text-decoration-none text-strikethrough-none\">36.106 m\u00b2<\/span><\/li>\n<li class=\"cvGsUA direction-ltr align-start para-style-body\"><strong><span class=\"a_GcMg font-feature-liga-off font-feature-clig-off font-feature-calt-off text-decoration-none text-strikethrough-none\">Products Used:<\/span><\/strong><\/li>\n<li><strong><span class=\"a_GcMg font-feature-liga-off font-feature-clig-off font-feature-calt-off text-decoration-none text-strikethrough-none\">Upper Layer: <\/span><\/strong><span class=\"a_GcMg font-feature-liga-off font-feature-clig-off font-feature-calt-off text-decoration-none text-strikethrough-none\">ALVATECH COLOR 2.00 mm marr\u00f3n \u2013\u00a0<\/span><span class=\"a_GcMg font-feature-liga-off font-feature-clig-off font-feature-calt-off text-decoration-none text-strikethrough-none\">Geotextil PP 1.000 g\/m\u00b2<\/span><\/li>\n<li><strong><span class=\"a_GcMg font-feature-liga-off font-feature-clig-off font-feature-calt-off text-decoration-none text-strikethrough-none\">Lower Layer: <\/span><\/strong><span class=\"a_GcMg font-feature-liga-off font-feature-clig-off font-feature-calt-off text-decoration-none text-strikethrough-none\">ALVATECH 5002 2.00 mm negra \u2013\u00a0<\/span><span class=\"a_GcMg font-feature-liga-off font-feature-clig-off font-feature-calt-off text-decoration-none text-strikethrough-none\">Geotextil PP 1.000 g\/m\u00b2<\/span><\/li>\n<\/ul>\n<p><strong>Context<\/strong><\/p>\n<p data-start=\"526\" data-end=\"658\">The Zahare\u00f1a Reservoir is part of the strategic water storage system for artificial snow production at the Sierra Nevada ski resort.<\/p>\n<p data-start=\"660\" data-end=\"789\">Located at over 2,600 meters above sea level, it is the highest-altitude water storage reservoir in the entire Iberian Peninsula.<\/p>\n<p data-start=\"791\" data-end=\"836\">Operating conditions are extremely demanding: <img loading=\"lazy\" decoding=\"async\" class=\"wp-image-3978 alignright\" src=\"https:\/\/sotrafageo.com\/wp-content\/uploads\/2026\/02\/PHOTO-2025-11-03-08-03-13-300x122.jpg\" alt=\"\" width=\"510\" height=\"219\" \/><\/p>\n<ul data-start=\"838\" data-end=\"1016\">\n<li data-start=\"838\" data-end=\"871\">\n<p data-start=\"840\" data-end=\"871\">Continuous freeze\u2013thaw cycles<\/p>\n<\/li>\n<li data-start=\"872\" data-end=\"908\">\n<p data-start=\"874\" data-end=\"908\">Ice thicknesses of up to 1 meter<\/p>\n<\/li>\n<li data-start=\"909\" data-end=\"952\">\n<p data-start=\"911\" data-end=\"952\">Rapid water level drawdowns (1\u20132 m\/day)<\/p>\n<\/li>\n<li data-start=\"953\" data-end=\"994\">\n<p data-start=\"955\" data-end=\"994\">Temperature variations exceeding 25\u00b0C<\/p>\n<\/li>\n<li data-start=\"995\" data-end=\"1016\">\n<p data-start=\"997\" data-end=\"1016\">High UV radiation<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"1018\" data-end=\"1215\">Following repeated loss of watertightness in the original system, a complete rehabilitation of the waterproofing system was undertaken, prioritizing structural reliability and long-term durability.<\/p>\n<p data-start=\"1018\" data-end=\"1215\"><strong>Challenge<\/strong><\/p>\n<p data-start=\"1238\" data-end=\"1306\">The repair of this reservoir presented several technical challenges:<\/p>\n<h3 data-start=\"1308\" data-end=\"1338\">High-Mountain Conditions<\/h3>\n<p data-start=\"1339\" data-end=\"1462\">The geomembrane had to withstand friction from ice sheets, stresses caused by thermal contraction, and extreme UV exposure.<\/p>\n<h3 data-start=\"1464\" data-end=\"1489\">Aggressive Subgrade<\/h3>\n<p data-start=\"1490\" data-end=\"1599\">Presence of outcropping rock (mica schists and quartzites) and sharp-edged gravels, increasing puncture risk.<\/p>\n<h3 data-start=\"1601\" data-end=\"1623\">Hydraulic Safety<\/h3>\n<p data-start=\"1624\" data-end=\"1709\">Freeboard had to be improved and the spillway adapted to guarantee structural safety.<\/p>\n<h3 data-start=\"1711\" data-end=\"1740\">Critical Infrastructure<\/h3>\n<p data-start=\"1741\" data-end=\"1863\">The reservoir is essential for the operation of the ski resort, requiring maximum reliability of the waterproofing system.<\/p>\n<h3 data-start=\"1865\" data-end=\"1892\">Landscape Integration<\/h3>\n<p data-start=\"1893\" data-end=\"1996\">As the site is located within a protected natural environment, minimizing visual impact was a priority.<\/p>\n<p data-start=\"1893\" data-end=\"1996\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone  wp-image-3984\" src=\"https:\/\/sotrafageo.com\/wp-content\/uploads\/2026\/02\/PHOTO-2026-01-09-10-29-52-300x225.jpg\" alt=\"\" width=\"208\" height=\"158\" \/>\u00a0<img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-3976 \" style=\"color: #333333; font-style: normal; font-weight: 300;\" src=\"https:\/\/sotrafageo.com\/wp-content\/uploads\/2026\/02\/PHOTO-2025-10-24-14-24-05-e1771847048768-300x241.jpg\" alt=\"\" width=\"200\" height=\"162\" srcset=\"https:\/\/sotrafageo.com\/wp-content\/uploads\/2026\/02\/PHOTO-2025-10-24-14-24-05-e1771847048768-300x241.jpg 300w, https:\/\/sotrafageo.com\/wp-content\/uploads\/2026\/02\/PHOTO-2025-10-24-14-24-05-e1771847048768-1024x822.jpg 1024w, https:\/\/sotrafageo.com\/wp-content\/uploads\/2026\/02\/PHOTO-2025-10-24-14-24-05-e1771847048768-768x617.jpg 768w, https:\/\/sotrafageo.com\/wp-content\/uploads\/2026\/02\/PHOTO-2025-10-24-14-24-05-e1771847048768-500x402.jpg 500w, https:\/\/sotrafageo.com\/wp-content\/uploads\/2026\/02\/PHOTO-2025-10-24-14-24-05-e1771847048768.jpg 1290w\" sizes=\"auto, (max-width: 200px) 100vw, 200px\" \/><img loading=\"lazy\" decoding=\"async\" class=\"alignnone  wp-image-3982\" style=\"font-weight: 300;\" src=\"https:\/\/sotrafageo.com\/wp-content\/uploads\/2026\/02\/PHOTO-2025-12-22-09-47-49-300x225.jpg\" alt=\"\" width=\"225\" height=\"172\" \/><span style=\"font-weight: 300;\">\u00a0<\/span><\/p>\n<p data-start=\"1893\" data-end=\"1996\"><strong>Solution<\/strong><\/p>\n<p data-start=\"2018\" data-end=\"2178\">To address these challenges, a double-barrier waterproofing system was designed and installed using <strong>ALVATECH 5002<\/strong> and<strong> ALVATECH COLOR BROWN<\/strong> 2.00 mm geomembranes.<\/p>\n<p data-start=\"2180\" data-end=\"2213\">The installed system consists of:<\/p>\n<ul data-start=\"2215\" data-end=\"2459\">\n<li data-start=\"2215\" data-end=\"2268\">\n<p data-start=\"2217\" data-end=\"2268\">PP Geotextile 1,000 g\/m\u00b2 as base protection layer<\/p>\n<\/li>\n<li data-start=\"2269\" data-end=\"2330\">\n<p data-start=\"2271\" data-end=\"2330\">ALVATECH 5002 2.00 mm black geomembrane (primary barrier)<\/p>\n<\/li>\n<li data-start=\"2331\" data-end=\"2370\">\n<p data-start=\"2333\" data-end=\"2370\">PP Geotextile 1,000 g\/m\u00b2 interlayer<\/p>\n<\/li>\n<li data-start=\"2371\" data-end=\"2459\">\n<p data-start=\"2373\" data-end=\"2459\">ALVATECH COLOR 2.00 mm brown geomembrane (secondary barrier and landscape integration)<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"2461\" data-end=\"2499\">The double-liner configuration allows:<\/p>\n<ul data-start=\"2501\" data-end=\"2721\">\n<li data-start=\"2501\" data-end=\"2546\">\n<p data-start=\"2503\" data-end=\"2546\">Significant increase in the safety factor<\/p>\n<\/li>\n<li data-start=\"2547\" data-end=\"2623\">\n<p data-start=\"2549\" data-end=\"2623\">Integration of an interlayer leak detection system connected to drainage<\/p>\n<\/li>\n<li data-start=\"2624\" data-end=\"2681\">\n<p data-start=\"2626\" data-end=\"2681\">Reduced puncture risk under structural ice conditions<\/p>\n<\/li>\n<li data-start=\"2682\" data-end=\"2721\">\n<p data-start=\"2684\" data-end=\"2721\">Extended service life of the system<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"2723\" data-end=\"2876\">The upper brown geomembrane enhances visual integration with the high-mountain environment, reducing landscape impact compared to conventional solutions.<\/p>\n<p data-start=\"2723\" data-end=\"2876\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-3986\" src=\"https:\/\/sotrafageo.com\/wp-content\/uploads\/2026\/02\/Captura-de-pantalla-2026-02-20-151705-300x140.png\" alt=\"\" width=\"300\" height=\"140\" srcset=\"https:\/\/sotrafageo.com\/wp-content\/uploads\/2026\/02\/Captura-de-pantalla-2026-02-20-151705-300x140.png 300w, https:\/\/sotrafageo.com\/wp-content\/uploads\/2026\/02\/Captura-de-pantalla-2026-02-20-151705-1024x477.png 1024w, https:\/\/sotrafageo.com\/wp-content\/uploads\/2026\/02\/Captura-de-pantalla-2026-02-20-151705-768x358.png 768w, https:\/\/sotrafageo.com\/wp-content\/uploads\/2026\/02\/Captura-de-pantalla-2026-02-20-151705-1536x716.png 1536w, https:\/\/sotrafageo.com\/wp-content\/uploads\/2026\/02\/Captura-de-pantalla-2026-02-20-151705-500x233.png 500w, https:\/\/sotrafageo.com\/wp-content\/uploads\/2026\/02\/Captura-de-pantalla-2026-02-20-151705.png 1701w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"Location: Sierra Nevada \u2013 Monachil (Granada), Spain Installed Geomembrane: 36.106 m\u00b2 Products Used: Upper Layer: ALVATECH COLOR 2.00 mm marr\u00f3n \u2013\u00a0Geotextil PP 1.000 g\/m\u00b2 Lower Layer: ALVATECH 5002 2.00 mm negra \u2013\u00a0Geotextil PP 1.000 g\/m\u00b2 Context The Zahare\u00f1a Reservoir is part of the strategic water storage system for artificial snow production at the Sierra Nevada ski resort. Located at over 2,600 meters above sea level, it is the highest-altitude water storage reservoir in the entire Iberian Peninsula. Operating conditions are extremely demanding: Continuous freeze\u2013thaw cycles Ice thicknesses of up to 1 meter Rapid water level drawdowns (1\u20132 m\/day) Temperature variations exceeding 25\u00b0C High UV radiation Following repeated loss of watertightness in the original system, a complete rehabilitation of the waterproofing system was undertaken, prioritizing structural reliability and long-term durability. Challenge The repair of this reservoir presented several technical challenges: High-Mountain Conditions The geomembrane had to withstand friction from ice sheets, stresses caused by thermal contraction, and extreme UV exposure. Aggressive Subgrade Presence of outcropping rock (mica schists and quartzites) and sharp-edged gravels, increasing puncture risk. Hydraulic Safety Freeboard had to be improved and the spillway adapted to guarantee structural safety. Critical Infrastructure The reservoir is essential for the operation of the ski resort, requiring maximum reliability of the waterproofing system. Landscape Integration As the site is located within a protected natural environment, minimizing visual impact was a priority. \u00a0\u00a0 Solution To address these challenges, a double-barrier waterproofing system was designed and installed using ALVATECH 5002 and ALVATECH COLOR BROWN 2.00 mm geomembranes. The installed system consists of: PP Geotextile 1,000 g\/m\u00b2 as base protection layer ALVATECH 5002 2.00 mm black geomembrane (primary barrier) PP Geotextile 1,000 g\/m\u00b2 interlayer ALVATECH COLOR 2.00 mm brown geomembrane (secondary barrier and landscape integration) The double-liner configuration allows: Significant increase in the safety factor Integration of an interlayer leak detection system connected to drainage Reduced puncture risk under structural ice conditions Extended service life of the system The upper brown geomembrane enhances visual integration with the high-mountain environment, reducing landscape impact compared to conventional solutions.","protected":false},"author":2,"featured_media":3980,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[79],"tags":[81,84,85],"class_list":["post-3994","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-alvatech-color","tag-alvatech","tag-geomembranes","tag-reservoir-waterproofing"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>ALVATECH 2.00 mm Geomembrane in the Highest Reservoir<\/title>\n<meta name=\"description\" content=\"Technical case study: ALVATECH 2.00 mm geomembrane installed in the highest reservoir in the Iberian Peninsula under extreme high-altitude conditions.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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