![\"Ancient](\"https:\/\/www.europesays.com\/italy\/wp-content\/uploads\/2026\/08\/drainage-network-theater-catania-1.jpg\")
<\/a>Ruins of the Greek-Roman theater in Catania. Credit: Matthias S\u00fc\u00dfen, CC BY-SA 4.0<\/a><\/p>\nThe research focused on the orchestra, the open performance area at the center of the theater. Today, groundwater often rises through the floor and damages the marble paving. During wet periods, water covers the lower monument for months.<\/p>\n
The study used Ground Penetrating Radar<\/a>, or GPR, along with geological data from earlier boreholes. The survey traced underground features without disturbing the site.<\/p>\n The results point to at least two drainage channels<\/a> running roughly north to south beneath the orchestra. The channels sit 60 to 70 centimeters below the walking surface. Their outlets are still visible inside a cavity beneath the stage.<\/p>\n One clear feature lies near the center of the orchestra. Radar data show a masonry vault about one meter below the floor, supported by side walls. The team interprets the structure as part of a drainage channel. A second channel appears in the eastern part of the orchestra at a similar depth.<\/p>\n The channels seem to have linked with a larger drain along the northern edge of the orchestra, known as an euripus. From there, water could move into the underground network and away from the theater.<\/p>\n The system likely carried groundwater rising from higher ground and rainwater. The theater also hosted water shows in antiquity, so the drains may have helped remove water used during such performances.<\/p>\n Some parts of the network are now blocked by sediment built up over many centuries. Another possible channel lies beneath the western side of the orchestra, but researchers couldn\u2019t trace it because a 19th-century building covers the area.<\/p>\n The findings also help explain damage seen in the orchestra. Surveys in 2022 and 2023 found areas where the marble paving had sunk. The southeast sector showed some of the worst damage, and one buried channel lies beneath this zone.<\/p>\n Groundwater levels vary sharply at the site. Depending on rainfall, the water table ranges from about 1.8 meters below the orchestra floor to one meter above it. These changes lead to repeated flooding and water movement<\/a> through the paving.<\/p>\n Standing water leaves sediment on stone surfaces. Long periods of moisture also support biological growth and weeds, adding to the damage. Blocked ancient drains could be part of the reason water now stays beneath the theater.<\/p>\n The study also points to major changes in the landscape around the theater. The orchestra floor sits at about 10.4 meters above sea level, while Via Vittorio Emanuele is roughly 13 meters high. Lava from the 1669 eruption, later fills, and 19th-century road work changed the original ground levels.<\/p>\n Boreholes found six to seven meters of fill and wall remains in parts of the area. Researchers therefore propose an older natural outlet near the present street, perhaps linked to an ancient branch of the Amenano River. Water from the theater\u2019s drainage system may once have flowed toward this route and then onward to the sea.<\/p>\n Built over earlier Greek structures during the first century CE, the theater formed a large entertainment complex with the nearby Odeon.<\/p>\n Published in Annals of Geophysics, the study maps a buried drainage network and provides data for future work to track groundwater and protect the theater\u2019s stone floors.<\/p>\n Publication: Tarascio, S., Falco, G., Barreca, G., Gambino, S., & Monaco, C. (2026). GPR survey for the reconstruction of the canalization system beneath the orchestra level of the Ancient Theatre of Catania (Italy).\u00a0Annals of Geophysics,\u00a069(3), SY336. doi:10.4401\/ag-9499<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"A new geophysical study has mapped parts of a buried water network beneath the Ancient Theatre of Catania.…\n","protected":false},"author":2,"featured_media":38910,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[25693,25694,5,7724,5110],"class_list":["post-38909","post","type-post","status-publish","format-standard","has-post-thumbnail","category-italy","tag-ancient-engineering","tag-gpr","tag-italy","tag-roman-archaeology","tag-roman-architecture"],"_links":{"self":[{"href":"https:\/\/www.europesays.com\/italy\/wp-json\/wp\/v2\/posts\/38909","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.europesays.com\/italy\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.europesays.com\/italy\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/italy\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/italy\/wp-json\/wp\/v2\/comments?post=38909"}],"version-history":[{"count":0,"href":"https:\/\/www.europesays.com\/italy\/wp-json\/wp\/v2\/posts\/38909\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/italy\/wp-json\/wp\/v2\/media\/38910"}],"wp:attachment":[{"href":"https:\/\/www.europesays.com\/italy\/wp-json\/wp\/v2\/media?parent=38909"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.europesays.com\/italy\/wp-json\/wp\/v2\/categories?post=38909"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.europesays.com\/italy\/wp-json\/wp\/v2\/tags?post=38909"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}![\"Ancient](\"https:\/\/en.wikipedia.org\/wiki\/File:Catania_roman_theatre_msu2017-9981.jpg\")
<\/a>Drainage channel outlets leading toward the stage beneath the orchestra floor. Credit: University of Catania<\/p>\n<\/a>The theater\u2019s orchestra, which is often flooded. Credit: Luca Aless, CC BY-SA 4.0<\/a><\/p>\n