Kogin Rokel

Kogin Rokel (wanda kuma shi ne Kogin Seli ; a da Kogin Pamoronkoh ) shi ne kogi mafi girma a Jamhuriyar Saliyo a Yammacin Afirka. Kogin yana da girman 10,622 km2 (4,101 sq mi) girmansa, tare da raba magudanar ruwa ta tsaunukan Gbengbe da Kabala da kuma tsaunukan Sula . Kogin da ya mamaye fadinsa ya kai murabba'in kilomita 2,950 km2 (1,140 sq mi) ya zama wurin dausayin Ramsar mai mahimmanci a shekarar 1999. Yanayin ƙasa Rokel ta tashi a 900 metres (3,000 ft) cikin tudun tsaunukan Loma, a cikin tsaunukan Guinea na arewa maso tsakiyar Sierra Leone, yana gudana kudu maso yamma 240 miles (390 km) ta cikin tsaunuka, tare da ƙaramin rafi mai layi ɗaya da ake kira Port Loko Creek, yana ratsawa cikin kogin Rokel kafin ya shiga Tekun Atlantika . Kogin, bayan ya haɗu da Kogin Bankasoka, ana kuma kiransa Kogin Sierra Leone, yana da 25 miles (40 km) tsawonsa kuma yana da faɗin 4–10 miles (6.4–16.1 km) . Freetown da Pepel su ne tashoshin jiragen ruwa guda biyu da ke bakin tekun. Yayin da kogin ke faɗaɗawa kuma ya haɗu da Tekun Atlantika, faɗinsa ya kai kusan 11 kilometres (6.8 mi) . Gabar tekun kudu ita ce mafi zurfi kuma tana samar da tashar jiragen ruwa ta halitta, wacce aka ruwaito cewa ita ce ta uku mafi girma a duniya. Dausayin Mangrove da kuma filayen laka sune suka fi rinjaye a tsarin halittu (wanda ya kai kashi 19% na dajin mangrove a ƙasar) da aka lura a kusa da kogin . Faɗin kogin ya kai 10,622 square kilometres (4,101 sq mi)girmansa , tare da raba magudanar ruwa ta tsaunukan Gbengbe da Kabala da kuma tsaunukan Sula. Rokel ya faɗi 15 metres (49 ft) a magudanar ruwan Bumbuna. Nau'ikan Mangrove da aka rubuta sune Rhizophora, Avicennia, Laguncularia, da Conocarpus, waɗanda suka mamaye yanki mai fadin 34.23 hectares (84.6 acres) . Babban birnin Sierra Leone na Freetown yana kan hanyar shiga Kogin Sierra Leone, kimanin 25 miles (40 km) daga tashar jiragen ruwa ta Pepel. An bayyana Kogin Rokel da magudanan ruwansa a matsayin "Rukunin Kogin Rokel" don nazarin ƙasa. An ruwaito cewa samuwar ƙasa a cikin wannan rukunin ta samo asali ne daga Tabe tare da laka mai ƙanƙara da ke mamaye gefen gabas kuma suna fallasa a gefen kogin a wasu wurare; samuwar ƙasa da aka lura a cikin kogin duwatsu ne na dutse. Tsarin ya kasance a cikin nau'ikan duwatsu masu lanƙwasa. An kuma ruwaito cewa asalinsa ya kasance na zamanin thermo-tectonic na Pan African na kimanin shekaru 550 Ma. A fannin ƙasa, wani kwarin da ke sarrafa shi ta hanyar tectonically tare da samuwar zamanin Precambrian, Infra-Cambrian da Pleistocene . Kogin yana kewaye da tsaunukan Sula a kudu maso gabas da tuddai masu launin grantoid na tsaunukan Gbengbe da Kabal a yamma. Babban magudanar ruwa a cikin kogin ana kiransa da ruwan Bumbuna inda kogin ya faɗi da 15 metres (49 ft) samar da aikin gina aikin wutar lantarki na ruwa. Tarihi John MacCormac, wani ɗan kasuwa ɗan ƙasar Ireland, ya zauna a Tsibirin Timbo a shekarar 1816 kuma ya fara fitar da itacen oak na Afirka daga Kogin Rokel. Cinikin ya kasance mai matuƙar muhimmanci na ɗan lokaci amma daga ƙarshe ya ragu. Haƙar ma'adinai da zinare aluvial sun fara ne a ƙarshen shekarun 1920 da farkon shekarun 1930, yayin da ake ci gaba da aikin samar da wutar lantarki a Bumbuna Falls. Mutanen Yalunka sun kafa babban birninsu, Falaba, kusa da tushen Rokel. Kogin da ke kewaye da bakin teku, wanda ya mamaye faɗin 2,950 square kilometres (1,140 sq mi), an lissafa shi a matsayin wurin Ramsar mai mahimmancin dausayi a shekarar 1999. Wurin yana da iyaka da Cape Point a gefen yamma na Freetown, da Kogin Bunce a ɗaya daga cikin gaɓar sa, da kuma Tagrin Point inda yankunan Rokel suka haɗu a ƙarshen kudu na bakinsa. A watan Fabrairun 2025, Thomas Mariee ya kammala gangarar jirgin ruwa mai nisan kilomita 365 daga kogin Rokel cikin kwanaki 17. Ci gaba An auna kwararar kogin Rokel a tashoshin aunawa guda uku. An ruwaito cewa matsakaicin da mafi ƙarancin fitarwa a Magbass, ɗaya daga cikin tashoshin uku, su ne 1,905 cubic metres (67,300 cu ft) da kuma 2 cubic metres (71 cu ft) bi da bi. Akwai ayyuka da yawa da aka gina a cikin kogin wanda ke samo buƙatun samar da ruwansu daga wannan kogin. Haƙar ma'adinan ƙarfe a Marampa ya dogara ne da ruwan famfo da ake samu daga kogin. An sanya hannu kan Dokar Haƙƙin Ruwa ta Kogin Rokel (Tabbatarwa) tare da masu haɓaka ma'adinan; ma'adinan suna aiki tun daga 1933 zuwa 1975 ta Kamfanin Ci Gaban Sierra Leone (DELCO) da Astro Minerals daga 1983. Yarjejeniyar ruwa ta ba da "haƙƙoƙin musamman da fifiko ga amfani da ruwan Rokel ta hanyar yarjejeniya ta musamman" na tsawon shekaru 89 daga 1 ga Janairu 1938. Ba a magance tasirin muhalli ga masu amfani da ke ƙasa da zubar da wutsiya daga ayyukan haƙar ma'adinai ba. Baƙin da aka cire ya haifar da rage tsayin ɗaya daga cikin tuddai masu ɗauke da ma'adinan da 24.4 metres (80 ft) . manazarta