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非洲水能资源
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非洲水能资源
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Africa hydropower resources
非洲水能资源
非洲为高原型大陆,平均海拔750米。非洲的气候特点是大部分地区高温、干燥、少雨,降水量一般从赤道向南北侧减少。全洲1/3的地区降水量不足200毫米,只有刚果盆地和几内亚湾沿岸一带及山地的风向坡年降水量为300~1000毫米。非洲大陆内流河的流域面积占全洲面积的31%,内流区基本没有水能资源。外流区的河流大部分属于大西洋水系,如扎伊尔河、尼日尔河、沃尔特河等。尼罗河流入地中海,赞比西河流入印度洋。
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grouting methods for tunnel and underground engineering
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