Bayan shekaru 21 na gano sake farfaɗowa na Coyolatl, wanda ke cikin Sierra Negra, a kudancin jihar Puebla, kuma ya binciko kilomita da yawa, GSAB (gianungiyar Speleological Speciology na Beljiyam) ya yi mafarkin gano magudanar ruwa da yin tafiya a cikin hakan yanki. Haka abin ya kasance.
Gabaɗaya, yayin ziyartar kogo, kun shiga kuma ku fita ta wuri ɗaya, ma'ana, galibi suna da hanya ɗaya ce kawai. Amma akwai na musamman na musamman, wadanda zaka iya shiga daga saman da aka sani da magudanar ruwa da fita daga kasa, ana kiranta farfadowa. Wadannan kogon an san su da "travesías".
A shekarar 1985 sun binciko wasu abubuwan da suka faru a wani bangare na tsaunin, amma daya musamman ya kasance yana da girma sosai, ƙofar tana da tsayin mita 80 kuma ruwan ya ba da Kogin Koyolapa, suna kiranta da Coyolatl (ruwan coyote). A cikin makonni biyar sun binciki fiye da kilomita 19 na hanyoyin wucewa, a cikin dutsen, har suka kai ga matakin mafi girma a + mitoci 240, a cikin mafi nisa da sake fasalta sassan kogon. Don isa gare su, sun kafa wani sansanin karkashin kasa mai nisan kilomita 5 daga mashigar, na tsawon kwanaki hudu. A can an bar wasu hawa masu wahala da nisa sosai a cikin kogon, suna sa masu binciken su yi tunanin cewa mashigar kogon su kasance a cikin wani bangare na tsaunin tsauni don isa wadannan hawa, a can ne mafarkin ya tashi cewa Coyolatl ya zama tafiya. A cikin shekaru 21 na bincike sun sami manyan koguna da yawa.
Ofar shiga cikin Kogon Fata
A karshen balaguron 2003, wani rukuni ya isa ƙofar kogon da ke da tsayin mita 20 mai faɗi da mita 25, sun yi tafiyar mita 150 ta hanyar wani katafaren gidan tarihi wanda a hankali yake taƙaitawa har sai da ya zama layin da ya ƙare da ƙarami daki Da alama bai ci gaba ba, amma ƙaramin taga mai tsawon mita 3 an bar shi ba a bincika ba saboda rashin lokaci, wanda suke kira La Cueva de la Esperanza ko TZ-57.
Don balaguro na 2005 sun sami sabbin koguna waɗanda galibi aka bincika, amma musamman ɗayansu yana cikin tunani. Tafiya na awa daya daga sansanin sansanin shine ƙofar zuwa TZ-57, sun ɗauki ɗan gajeren harbi har sau 60, sun isa wani babban zaure kuma tsakanin wasu shingayen kogon kuma an ci gaba da bincike. Jerin jerin gwano, wucewa, fadada ruwa da kuma rijiyoyi tsakanin faɗuwar mita 10 zuwa 30 sun ba da rami, iska mai gudana ya sa su ci gaba da sanya igiyoyi a kowace rijiya.
Bayan sun kai harbi, sai suka jefa dutse wanda ya dauki sakanni kafin ya kai kasa. Daya ya ce "Yana da fiye da mita 80." Wani kuma ya ce, "To, bari mu sauke ta!"
Fasahar fasaha ta igiyoyi ta fara gangarowa, tunda dole ne a guji adadi mai yawa na duwatsu da duwatsu waɗanda suke kan rijiyar. A ƙasa, wani gallery ya ba da damar harbi na mita 20 na ƙarshe wanda ya jagorantar da su zuwa ramin makaho (ba tare da wata hanyar fita ba). Ya wajaba a hau mitoci 20 don fita daga wannan rijiyar kuma a isa wani gidan balo na 25 mai faɗi da tsayin mita 25. Yawancin taro da tafiye-tafiyen bincike sun zama dole har zuwa wannan lokacin.
Don haka, a waccan shekarar an bar abubuwan da ba a sani ba da yawa, kamar rijiyar mita 20 wacce ba ta sauko ba da wasu ɗakunan hawa masu hawa a cikin TZ-57.
Wani warware ta warware
A cikin 2006, marubuta daga ƙasashe uku sun sake haɗuwa a Saliyo Negra don komawa sassan da ba a san su ba waɗanda suka bari a bara. Daya daga cikin abubuwanda suka fi birgewa shine harbi na mita 20 wanda ba'a saukeshi ba. An san su da nisan mita 20 ne kawai daga yin haɗin tarihi tsakanin kogo biyu. Biyu daga cikin masu binciken da suka kasance a cikin binciken Coyolatl, a cikin 1985, sun sanya igiya, sun gangara zuwa hanyar da ruwa wanda ba su gane shi ba a farkon lamarin kuma suna shakkar cewa suna ko'ina a san su a Coyolatl. Ya dauki awa daya yana tafiya a cikin wannan sabon gidan tarihin har sai da suka sami cukulan cakulan da suka bari da kansu a matsayin tashar binciken shekaru 21 da suka gabata. Wannan yana nufin tunda sun saukar da harbin mai tsawon mita 20 suna cikin daya daga cikin mafi nisa sassan Coyolatl kuma basu tuna da shi ba.
Kwanaki bayan haka, kogwanni takwas suka shirya duk kayan aikin da ake buƙata don ƙetare ƙasar kuma su kasance farkon masu bincike don yin wannan tafiya. Sun yi tafiya cikin duka TZ-57 kuma sau ɗaya a Coyolatl, sun yi mamakin ganin manyan ɗakunan ajiya da suka kai tsayin mita 40 ko 50 da kuma ruwan babban kogin.
Ya ɗauki awanni goma don yin duka hanyar, daga ƙofar TZ-57, wanda ke a kan mita 1,000 sama da matakin teku, zuwa ƙofar a Coyolatl, wanda ke kan tsayin 380 sama da matakin teku. Wannan yana nufin cewa tafiya gaba ɗaya tana da mita 620 na rashin daidaituwa da kuma tafiyar kilomita 7, sanya shi a wuri na uku a Meziko. A ƙasan Tsarin Purificación, wanda ya mamaye wuri na farko da mita 820 na rashin daidaito da kuma tafiyar kilomita 8 (jimlar bambancin mita 953). Hanya mafi zurfin ta biyu ita ce Tepepa System, mai zurfin mita 769 da kuma hanya mai nisan kilomita 8 (jimlar bambancin tsawo shine mita 899).
Akwai dandano mai dadi a bakin duk masu binciken wadannan balaguron, domin bayan shekaru da yawa mafarkin ya cika, bayan yawan balaguro da koguna da aka gano a cikin Sierra Negra, Coyolatl tafiya ce! Shiga daga sama (resumidero) wanda shine Cueva de la Esperanza ko TZ-57 kuma barin ƙasa zuwa Coyolatl (farkawa) ya kasance na kwarai.
