{"id":912,"date":"2024-08-21T09:53:17","date_gmt":"2024-08-21T07:53:17","guid":{"rendered":"https:\/\/lehrpfad.umwelt-campus.de\/rain-is-precious\/"},"modified":"2025-09-10T08:10:19","modified_gmt":"2025-09-10T06:10:19","slug":"rain-is-precious","status":"publish","type":"page","link":"https:\/\/lehrpfad.umwelt-campus.de\/en\/rain-is-precious\/","title":{"rendered":"Rain is precious"},"content":{"rendered":"\n<div class=\"wp-block-uagb-container uagb-block-ddf63a6a alignfull uagb-is-root-container\"><div class=\"uagb-container-inner-blocks-wrap\">\n<div class=\"wp-block-uagb-container uagb-block-d71b3bf5\">\n<h2 class=\"wp-block-heading\">Clever use and channelling of rainwater<\/h2>\n\n\n\n<figure class=\"wp-block-audio\"><audio controls src=\"https:\/\/lehrpfad.umwelt-campus.de\/wp-content\/uploads\/2025\/09\/119_1_eng.mp3\"><\/audio><\/figure>\n\n\n\n<p>Global water resources consist of approximately 97.5% saltwater and only about 2.5% freshwater, of which only a small fraction is accessible for human use. Freshwater is a rare and essential resource for human survival, but it is becoming increasingly scarce due to climate change impacts.<\/p>\n\n\n\n<p>To minimize potable water consumption, the Environmental Campus is equipped with an extensive rainwater collection, storage, and retention system. The collected rainwater is used for toilet flushing, adsorption systems and wetland biotopes. Combined with additional efficiency measures, such as waterless urinals and water-saving taps and sanitary ware, this system covers around one-third of the campus\u2018s water needs, saving 800 to 1,000 m3 of drinking water annually.<\/p>\n\n\n\n<figure data-wp-context=\"{&quot;imageId&quot;:&quot;69e90026bc1e1&quot;}\" data-wp-interactive=\"core\/image\" data-wp-key=\"69e90026bc1e1\" class=\"wp-block-image size-large wp-lightbox-container\"><img decoding=\"async\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" src=\"https:\/\/lehrpfad.umwelt-campus.de\/wp-content\/uploads\/2025\/08\/119_grafik-1024x523.webp\" alt=\"\" style=\"box-shadow:none\"\/><button\n\t\t\tclass=\"lightbox-trigger\"\n\t\t\ttype=\"button\"\n\t\t\taria-haspopup=\"dialog\"\n\t\t\taria-label=\"Enlarge\"\n\t\t\tdata-wp-init=\"callbacks.initTriggerButton\"\n\t\t\tdata-wp-on--click=\"actions.showLightbox\"\n\t\t\tdata-wp-style--right=\"state.imageButtonRight\"\n\t\t\tdata-wp-style--top=\"state.imageButtonTop\"\n\t\t>\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewBox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\" \/>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n\n\n\n<figure class=\"wp-block-audio\"><audio controls src=\"https:\/\/lehrpfad.umwelt-campus.de\/wp-content\/uploads\/2025\/09\/119_2_eng.mp3\"><\/audio><\/figure>\n\n\n\n<p><strong>Water collection system<\/strong><br>The roofs of buildings 9916, 9917, 9924, and 9925 (approximately 2,000 m2) collect rainwater and direct it into two underground tanks with a total capacity of 36 m3. Before further use, the water is filtered and disinfected using UV light. The remaining roofs of the buildings channel the rainwater into troughs and trenches distributed across the campus.<\/p>\n\n\n\n<p><strong>Flood protection and prevention<\/strong><br>Since rainwater infiltrates into swales and infiltration trenches or evaporates, the sewer system is not overwhelmed during heavy rainfall events, making a significant contribution to flood protection. Additionally, evaporation helps to<br>mitigate \u201eheat stress\u201c during summer. Overflow water is directed to ponds and retention areas, creating wetlands that enhance biodiversity on the campus.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-uagb-container uagb-block-e9c5f59b\">\n<div class=\"wp-block-uagb-info-box uagb-block-a99f778a uagb-infobox__content-wrap  uagb-infobox-icon-above-title uagb-infobox-image-valign-top hinweisbox\"><div class=\"uagb-ifb-content\"><div class=\"uagb-ifb-icon-wrap\"><div class=\"uagb-iconbox-icon-wrap uagb-infobox-shape-circle\"><svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 384 512\"><path d=\"M112.1 454.3c0 6.297 1.816 12.44 5.284 17.69l17.14 25.69c5.25 7.875 17.17 14.28 26.64 14.28h61.67c9.438 0 21.36-6.401 26.61-14.28l17.08-25.68c2.938-4.438 5.348-12.37 5.348-17.7L272 415.1h-160L112.1 454.3zM191.4 .0132C89.44 .3257 16 82.97 16 175.1c0 44.38 16.44 84.84 43.56 115.8c16.53 18.84 42.34 58.23 52.22 91.45c.0313 .25 .0938 .5166 .125 .7823h160.2c.0313-.2656 .0938-.5166 .125-.7823c9.875-33.22 35.69-72.61 52.22-91.45C351.6 260.8 368 220.4 368 175.1C368 78.61 288.9-.2837 191.4 .0132zM192 96.01c-44.13 0-80 35.89-80 79.1C112 184.8 104.8 192 96 192S80 184.8 80 176c0-61.76 50.25-111.1 112-111.1c8.844 0 16 7.159 16 16S200.8 96.01 192 96.01z\"><\/path><\/svg><\/div><\/div><div class=\"uagb-ifb-title-wrap\"><h3 class=\"uagb-ifb-title\">Tips and measures<\/h3><\/div><div class=\"uagb-ifb-separator\"><\/div><p class=\"uagb-ifb-desc\">Collect rainwater in rain barrels, cisterns, etc.<br><br>Use rainwater for watering the garden, for toilet flush or for the washing machine<br><br>If possible, do not seal green areas, otherwise the rain can no longer seep into the ground<br><br>Take measures to save water at home, such as water-saving taps and water-efficient household appliances (e.g. dishwasher, washing machine)<\/p><\/div><\/div>\n\n\n\n<h4 class=\"wp-block-heading\">Rainwater utilisation and storage<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>conserves drinking water resources.<\/li>\n\n\n\n<li>saves costs by reducing drinking water consumption.<\/li>\n\n\n\n<li>saves stormwater drainage fees.<\/li>\n\n\n\n<li>protects against flooding.<\/li>\n\n\n\n<li>is used for groundwater recharge.<\/li>\n<\/ul>\n<\/div>\n<\/div><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">Your location:<\/h2>\n\n\n    <div id=\"map_69e90026cac8a\" style=\"height: 400px; margin: 20px 0;\"><\/div>\n    <script>\n    document.addEventListener('DOMContentLoaded', function () {\n        var map = L.map('map_69e90026cac8a').setView([49.607665916682286, 7.16747988164957], 15);\n\n        \/\/ OSM Layer\n        L.tileLayer('https:\/\/{s}.tile.openstreetmap.org\/{z}\/{x}\/{y}.png', {\n            attribution: '&copy; OpenStreetMap contributors'\n        }).addTo(map);\n\n        \/\/ Icon f\u00fcr aktuelles Schild (blau, normal)\n        var currentIcon = L.icon({\n            iconUrl: 'https:\/\/unpkg.com\/leaflet@1.9.4\/dist\/images\/marker-icon.png',\n            shadowUrl: 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