La Thames Barrier Ita ce babbar shinge na biyu mafi girma a cikin ambaliyar ruwa a duniya (bayan Oosterscheldekering a cikin Netherlands) kuma yana can daga ƙasan daga tsakiyar London.
Manufarta ita ce ta hana ambaliyar ruwa daga ruwan tekun daga ƙarshen teku. Dole ne a ɗaga shi (rufe) kawai a babban igiyar ruwa, a ƙasan za a iya saukar da shi don sakin ruwan da ya taru a bayansa.
Bankin nasa yana arewacin Silvertown a cikin Landan London na Newham kuma bankin kudu yana cikin yankin New Charlton na Charlton a cikin Royal Borough na Greenwich. Rahoton Sir Hermann Bondi kan Tekun Arewa, ambaliyar da ta shafi 1953 da ta shafi wasu sassan mashigar Thames da wasu sassan Landan na da muhimmanci wajen gina katangar.
Ku sani cewa London na iya fuskantar matsalar ambaliyar ruwa. Ana hawan igiyar ruwa ta cikin Tekun Arewa, wanda ya takaita zuwa Tashar Ingilishi wanda ya isa tashar Thames. Idan guguwar ta zo daidai da lokacin bazara, matakan ruwa mai haɗari na iya faruwa a mashigar Thames. Wannan halin da aka haɗu tare da raƙuman ruwa a cikin Thames yana ba da abubuwan da ke haifar da ayyukan kare ambaliyar.
Labarin ya nuna cewa mutane 14 sun mutu a ambaliyar Thames ta 1928, sannan kuma wasu mutane 307 sun mutu a inasar Ingila a Tekun Arewa a cikin ambaliyar 1953.
Thames Barrier, wanda ya ratsa kogin kusa da Woolwich gabas da birnin London, ya buɗe a ranar 8 ga Mayu, 1984. Wannan fasaha ta fasaha; babbar shingen wayar hannu a duniya. Guda tara suka nutse a cikin gadon kogin kuma a tsakaninsu akwai kofofin karfe 10. Raguna masu ɗauke da ƙarfi suna ɗaukar mintuna 30 don matsar da ƙofofin cikin matsayi.
Ba a ba da izinin zuwa shingen masarauta ba, amma akwai kyawawan ra'ayoyi game da yawo kogi. A cikin cibiyar baƙon akwai shirye-shiryen sauti da bidiyo mai ban sha'awa game da gini da aiki na Thames Barrier.