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The Chattooga River (also spelled Chatooga, Chatuga, and Chautaga, variant name Guinekelokee River) is the main tributary of the Tugaloo River. Its headwaters are located southwest of Cashiers, North Carolina, and it stretches 〔U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data. (The National Map ), accessed April 26, 2011〕 to where it has its confluence with the Tallulah River within Lake Tugalo, held back by the Tugalo Dam. The Chattooga and the Tallulah combine to make the Tugaloo River starting at the outlet of Lake Tugalo. The Chattooga begins in southern Jackson County, North Carolina, then flows southwestward between northwestern Oconee County, South Carolina, and eastern Rabun County, Georgia. The "Chattooga" spelling was approved by the US Board on Geographic Names in 1897. The river was used as a setting for the fictional Cahulawassee River in the book and film ''Deliverance''. The Chattooga River flows into Tugalo Lake where it joins the Tallulah River. After flowing through Tugalo Dam the combined rivers become the Tugaloo River which, along with the Seneca River, becomes the Savannah River below Lake Hartwell. Downstream from that point, the water flows into the Atlantic Ocean near Savannah, Georgia. == Geology == The Chattooga River serves as part of the boundary between Georgia and South Carolina near latitude 35°N. The Chattooga River was not the original boundary line between South Carolina and Georgia. A treaty of 1816 extended the South Carolina boundary to its current location. Prior to 1816, the Chattooga was on the lands of the Cherokee Indian Nation. The Blue Ridge Mountains, where the Chattooga starts, are considered to be ancient, even by geological standards. The rock is mostly granite. Geologists believe that the Chattooga may have made one direction change during its life. Originally, it probably flowed southwesterly into the Chattahoochee riverbed and on to the Gulf of Mexico, but at some point, the Savannah River eroded its northern headland until it intersected the Chattooga and diverted it to the Atlantic. The rocks in the riverbed probably fell from the ridge above, but those rocks do not necessarily remain where they fall. In times of great downpours, high water, and fast currents, rocks can become dislodged and move downstream, taking other rocks and debris with them. During Hurricane Ivan in 2004, the wind force and waters knocked down big boulders off the sides. The hurricane released enough water in the Chattooga watershed to bring the river to its highest recorded flow rate, around to , rivaling the typical flow of the Grand Canyon. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Chattooga River」の詳細全文を読む スポンサード リンク
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