"Yanzu ne lokacin da za a fara shiri don yuwuwar ambaliyar ruwa a tafkin Mendenhall da kogin."
Basin na kunar bakin wake ya fara kwararowa saman saman dam din kankara kuma ya kamata mutanen da ke gangarowa daga kogin Mendenhall Glacier su kasance suna shirin yin illar ambaliya, amma babu wata alama da tsakar safiyar Juma'a aka sako ruwa daga wata ambaliyar ruwa da ta barke, a cewar jami'an hukumar kula da yanayi ta kasar Juneau.
Basin, wanda ya samu fitowar shekara-shekara da aka fi sani da jökulhlaups tun daga 2011, ya cika kuma "An gano raguwar ruwa daidai da ruwan da ke ambaliya da dam din kankara da sanyin safiyar Alhamis," in ji sanarwar NWS Juneau da aka bayar da karfe 11 na safiyar Alhamis a kan gidan yanar gizon sa ido kan Basin na Suicide. Sanarwar ta ce an dauki kwanaki shida daga lokacin da kwalwar ta cika har zuwa lokacin da aka fara fitar da ruwa a bara.
Sanarwar ta ce "Da zaran an gano shaidar magudanar ruwa a karkashin kasa, za a ba da gargadin ambaliyar ruwa."
Wani sabuntawa da aka buga a karfe 9 na safiyar Juma'a ya ce "matsayin bai canza ba" a cikin ranar da ta gabata.
Andrew Park, masanin yanayi a tashar da ke kusa da glacier, ya ce a cikin wata hira da aka yi da shi da safiyar Alhamis, malalar ruwan "ba ya nufin sakin na faruwa a yanzu."
"Wannan shi ne babban sakon - cewa muna sane da shi kuma muna tsayawa don ƙarin bayani," in ji shi.
Koyaya, ga mutanen yankin "yanzu ne lokacin da za a fara shirye-shiryen yiwuwar tasirin ambaliya," in ji wata sanarwa da NWS Juneau ta fitar.
Tun da safiyar Alhamis, matakin ruwan kogin Mendenhall ya kai ƙafa 6.43, idan aka kwatanta da kusan ƙafa huɗu a farkon sakin bara. Sai dai Park ta ce wani muhimmin abin da ke nuna tsananin duk wata ambaliyar ruwa a wannan shekara shi ne yadda ruwa ke tashi da sauri daga basin idan dam din kankara ya karye.
"Idan kana da ƙaramin ɗigon ruwa ba matsala ba ne," in ji shi. "Amma ka kwashe duk ruwan nan da nan sai ka sami manyan matsaloli."
Cibiyar Nazarin Yanayin Kasa ta Amurka ta shigar da sabbin kayan aikin sa ido a kan gadar Mendenhall da ke titin Back Loop a safiyar ranar Alhamis don taimakawa wajen fitar da shirye-shiryen sakin Basin Kashe. A bara lokacin da rikodin rikodin ruwa ya faru a ranar 5 ga Agusta, USGS ta dogara ne kawai akan ma'aunin ruwan kogin Mendenhall.
Randy Host, masanin ruwa tare da USGS, ya ce ma'aunin saurin zai ba da damar ƙarin sa ido kan ambaliyar ruwa ta cikin kogin.
"Zai yi matakin, abin da muke kira tsayin gage, kamar girman kogin," in ji shi. "Sa'an nan kuma za ta yi saurin sama. Zai auna saurin yadda ruwan ke kan saman."
Yawancin kogin Mendenhall yanzu yana cike da duwatsu don kare gine-gine bayan ambaliyar ruwa ta bara ta yi mugun zamewa a bakin kogin. Ambaliyar wani bangare ko gaba daya ta lalata gidaje uku da wasu gidaje fiye da dozin uku sun samu barna iri-iri.
Amanda Hatch, wacce gidanta ya cika da ruwa inci takwas a cikin rarrafe bara, ta ce an kammala wani gagarumin gyara don kara kare gidan danginta.
"Ba mu damu sosai ba saboda mun ɗaga gidan ƙafa huɗu," in ji ta. "Amma muna da motar lantarki, don haka idan ta yi ambaliya, za mu motsa motar zuwa kan titi zuwa gidan wani abokinmu. Amma mun shirya."
Hatch ya ce, an kuma karfafa filin rarrafe na gidan don kare shi daga ambaliya. Ta ce inshora bai rufe barnar da aka yi a shekarar da ta gabata ba, amma agajin bala’o’i da tallafin kudi da ake nema ta kungiyar Kananan Kasuwancin tarayya ya taimaka wajen gyara da ingantawa.
Bayan haka, Hatch ya ce, babu wani abu da yawa da za a yi sai lura da abin da ke faruwa.
"Babu labarin yadda za a yi, ko?" Ta ce. "Zai iya zama mafi girma. Yana iya zama ƙasa da ƙasa. Yana iya zama a hankali. Dole ne mu jira mu gani. Na yi farin ciki da an gama lissafin mu don kada mu damu da shi."
Marty McKeown, wanda gidansa ya samu barna mai yawa wanda ya bar ramin da ke gefen falon, ya ce har yanzu yana kan gyaran gidan da kuma filin da ya wanke - kuma baya ga lamunin SBA bai samu sassaucin da yake fata daga birnin ko wasu hukumomin gwamnati ba. Ya ce yana da “babban damuwa” game da halin da ake ciki a yanzu, amma bai firgita ba yayin da yake sa ido kan matsayin basin din.
"Za mu kalli kogin kuma mu dauki mataki idan an buƙata," in ji shi. "Ba zan fara ƙaura daga gidana ba, za mu sami lokaci idan wani abu ya faru."
An kafa sabon rikodin ruwan sama na watan Yuli a watan Yuni a cikin watan da ya gabata, inda rahoton farko ya nuna ya kai inci 12.21 na hazo a filin jirgin sama na Juneau idan aka kwatanta da na baya da ya kai inci 10.4 a shekarar 2015. An samu ruwan sama mai aunawa a duk tsawon kwanaki biyu na watan, ciki har da inci 0.77 da aka auna ranar Laraba.
Hasashen da aka yi a farkon mako mai zuwa yana kira don share sararin sama da manyan abubuwan da suka kai shekaru 70.
Robert Barr, mataimakin manajan Birni da Gundumar Juneau, ya ce ruwan sama mai yawa a Juneau ya shafi ruwan sama ne saboda idan kogin ya yi yawa, ana samun karancin sarari don sakin ruwa don cika kogin. Ya ce CBJ yana karɓar rahotannin yanayin yau da kullun daga NWSJ.
"Suna ba mu kyakkyawan zato game da yadda jökulhlaup zai yi kama da matakan saki daban-daban idan za a saki a lokacin wannan rahoton," in ji shi. "Don haka kowace rana muna samun hakan. Kuma ainihin abin da ke gaya mana shine idan aka saki jökulhlaup a yanzu, a kashi 20% zuwa 60% na jimlar Basin Kisa, ga yadda jökulhlaup zai yi kama. 100% zai kasance mafi muni fiye da bara."
Basin ba ya yawan sakin a 100%, in ji Barr. Shekarar da ta gabata ita ce mafi girma da kwandon ya fitar lokaci guda. Amma babu yadda za a iya bayyana saurin fitar da ruwan.
Da fatan za a danna mahaɗin da ke ƙasa don ƙarin bayani
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Lokacin aikawa: Oktoba-08-2024