The source of the Blue Nile was also reached in 1629 by the Portuguese Jesuit missionary Jerónimo Lobo and in 1770 by James Bruce.
Although a number of European explorers contemplated tracing the course of the Blue Nile from its confluence with the White Nile to Lake Tana, its gorge, which begins a few miles inside the Ethiopian border, has discouraged all attempts since Frédéric Cailliaud's attempt in 1821. The first serious attempt by a non-local to explore this reach of the river was undertaken by the American W.W. Macmillan in 1902, assisted by the Norwegian explorer B.H. Jenssen; Jenssen would proceed upriver from Khartoum while Macmillan sailed downstream from Lake Tana. However, Jenssen's boats were blocked by the rapids at Famaka short of the Sudan-Ethiopian border, and Macmillan's boats were wrecked shortly after they had been launched. Macmillan encouraged Jenssen to try to sail upstream from Khartoum again in 1905, but he was forced to stop 300 miles short of Lake Tana.[7] R.E. Cheesman, who records his surprise on arriving in Ethiopia at finding that the upper waters of "one of the most famous of the rivers of the world, and one whose name was well known to the ancients" was in his lifetime "marked on the map by dotted lines", managed to map the upper course of the Blue Nile between 1925–1933. He did this not by following the river along its banks and through its impassable canyon, but following it from the highlands above, travelling some 5,000 miles (8,000 km) by mule in the adjacent country.[8]
In 1968 at the request of Emperor Haile Selassie of Ethiopia, a team of 60 British and Ethiopian servicemen and scientists made the first descent of the Blue Nile from Lake Tana to a point near the Sudan border led by the eminent explorer Captain (now Colonel) John Blashford-Snell.[9] The team used specially built Avon inflatables and modified Royal Engineer assault boats to navigate the formidable rapids. This expedition made many important scientific discoveries[citation needed]. They also had to fight off two attacks by bandits.
In 1999, writer Virginia Morell[10] and photographer Nevada Wier made the journey by raft from Lake Tana to the Sudan, afterwards publishing a documentary about their journey.[11] In 2000, American and National Geographic reader, Kenneth Frantz, saw a photo taken by Nevada Wier for National Geographic which would lead him to found the charity Bridges to Prosperity. This photo showed a bridge broken during World War II, with 10 men on either side of the broken span pulling each other across the dangerous gap by rope. This historic bridge was built by Emperor Fasilides of Ethiopia in approximately 1660 with Roman bridge technology brought to Ethiopia by Portuguese soldiers during the battle with the Muslim invaders in 1507.[12] In both 2001 and 2009, Bridges to Prosperity volunteers travelled from the USA to Ethiopia to repair the broken bridge across the Blue Nile river, and later build a new cable suspended span not susceptible to flood. Bridges to Prosperity has now built over 93 footbridges in 13 countries.[13]
On April 28, 2004, geologist Pasquale Scaturro and his partner, kayaker and documentary filmmaker Gordon Brown, became the first people to navigate the Blue Nile. Though their expedition included a number of others, Brown and Scaturro were the only ones to remain on the expedition for the entire journey. They chronicled their adventure with an IMAX camera and two handheld video cams, sharing their story in the IMAX film Mystery of the Nile and in a book of the same title.[14] Despite this attempt, the team was forced to use outboard motors for most of their journey, and it was not until January 29, 2005, when Canadian Les Jickling and New Zealander Mark Tanner reached the Mediterranean Sea, that the river had been paddled for the first time in recorded history with human power from source to sea.
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