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英语翻译
环境方面的外文文献,求高手帮翻译,重谢
The Rio São Francisco basin,with an area of 631,133km2,covers 7.4% of Brazil.It is situated between 21°and 7°S latitudes and receives precipitation ranging from 350 to 1,900 mm in average years.The Rio São Francisco has an average annual discharge of 100 ×109 m3 with an average flow of 3.150 m3/s at its mouth(PLANVASF 1986).The 2,900-km river crosses fiveBrazilian states and is the 31st longest river in the world (Welcomme 1985).Its water is used for electricity generation,irrigation,urban and industrial supplies,navigation,and fisheries (Diegues 1994).
The Rio das Velhas is the longest tributary in the São Francisco basin.It is oriented in a southwest to northeast direction and extends 761 km from its headwaters,
at an altitude of 1,520 m,to its confluence with the São Francisco River,at an altitude of 478 m.The estimated average annual flow is 300 m3/s (Q95%= 103.69 m3/s) with a drainage area of 29,173 km2 and a mean width of 38.3 m (CETEC 1983).
The headwaters of the Rio das Velhas are located in a transition zone between the Atlantic rainforest and cerrado,which is a common savanna-like vegetation of central Brazil.Both biomes are identified as world biodiversity hotspots because they have exceptional concentrations of endemic species undergoing rapid habitat loss (Myers et al.2000).Below its headwaters to its mouth,it flows only through cerrado.Another vegetation formation occurs near high elevation headwaters:the“campos rupestres,” or rocky shrublands,such as seen in the Rio Cipó,one of its most important tributaries.This formation is very rich in floral and faunal species,with high diversity and endemism (Costa et al.1998).
环境方面的外文文献,求高手帮翻译,重谢
The Rio São Francisco basin,with an area of 631,133km2,covers 7.4% of Brazil.It is situated between 21°and 7°S latitudes and receives precipitation ranging from 350 to 1,900 mm in average years.The Rio São Francisco has an average annual discharge of 100 ×109 m3 with an average flow of 3.150 m3/s at its mouth(PLANVASF 1986).The 2,900-km river crosses fiveBrazilian states and is the 31st longest river in the world (Welcomme 1985).Its water is used for electricity generation,irrigation,urban and industrial supplies,navigation,and fisheries (Diegues 1994).
The Rio das Velhas is the longest tributary in the São Francisco basin.It is oriented in a southwest to northeast direction and extends 761 km from its headwaters,
at an altitude of 1,520 m,to its confluence with the São Francisco River,at an altitude of 478 m.The estimated average annual flow is 300 m3/s (Q95%= 103.69 m3/s) with a drainage area of 29,173 km2 and a mean width of 38.3 m (CETEC 1983).
The headwaters of the Rio das Velhas are located in a transition zone between the Atlantic rainforest and cerrado,which is a common savanna-like vegetation of central Brazil.Both biomes are identified as world biodiversity hotspots because they have exceptional concentrations of endemic species undergoing rapid habitat loss (Myers et al.2000).Below its headwaters to its mouth,it flows only through cerrado.Another vegetation formation occurs near high elevation headwaters:the“campos rupestres,” or rocky shrublands,such as seen in the Rio Cipó,one of its most important tributaries.This formation is very rich in floral and faunal species,with high diversity and endemism (Costa et al.1998).
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