推荐回答(5个)
雅鲁藏布大峡谷,位于西藏林芝地区的米林县和墨脱县境内。大峡谷的入口在米林县的派乡,出口处为墨脱县的巴昔卡村,长度为504.6公里,比美国的科罗拉多大峡谷还多出56公里。极限深度为6009米,无论是深度还是长度雅鲁藏布大峡谷都排在世界几大峡谷的前列,成为名副其实的世界第一大峡谷。
整个峡谷的海拔高度由峡谷入口派乡的2910米到巴昔卡出境处的海拔155米,在直线距离只有短短40多公里的范围内,河床比降陡直降落近三千米,由于这种得天独厚的自然地理条件,使整个雅鲁藏布大峡谷短短五百多公里的长度内却集中了整个雅鲁藏布江水力资源的三分之二,其单位面积内的水能蕴藏量为全世界之最。
我们在电视、杂志上看到最多的大峡谷景色,无疑就是位于大峡谷最北端扎曲村的雅鲁藏布扎曲大拐弯了。雅鲁藏布江在流经林芝地区米林县派区以后,受地质构造线的控制被迫改变方向,向东北流到东经95度左右与帕隆藏布汇合,然后又以世界第十五高峰海拔7782米的南迦巴瓦峰为轴急转作了一个近乎180度角度的急转弯,像一把巨斧将阻挡的东喜马拉雅山脉劈开一道大口后直奔平坦广阔的印度平原,在林芝地区墨脱县境内形成了世界地质构造上极为罕见的“马蹄形”大拐弯峡谷。
峡谷内以地震为代表的现在构造运动频繁强烈,不断地改变着大峡谷地区的地形地貌。本世纪中国大陆最大的一次地震就发生在大峡谷墨脱县境内,这场发生在1950年8月15日的震级为里氏8.5级,烈度达到12度的超级大地震,不仅使山川易容、河道堵塞断流达数日,惊天动地的江水溃决又酿成了下游印度阿萨姆平原的大洪灾。但让我们这些后来者更耿耿于怀的是,那传说中存在的谜一般美丽的“虹霞瀑布”也消失于那场山崩地裂中,只留下一个神秘的传说在莽莽丛林中让人遐想无限。
雅鲁藏布大峡谷的地理位置在哪里?它位于青藏高原,西藏东南部,环绕南迦巴瓦峰,雅鲁藏布江潇洒一甩所作的一个马蹄形大拐弯。大峡谷地区是一个著名山脉交汇处――北倚念青唐古拉,东望横断山,向西,则是喜马拉雅绵绵2500公里的冰峰雪岭。海拔7787米的南迦巴瓦峰正处于这一伟大山脉的东部尾闾,位居东喜马拉雅主峰之尊,为世界第十五高峰。
雅鲁藏布大峡谷位于中国西藏雅鲁藏布江(在故代藏文中意思是“从最高峰上流下来的水”)下游,是一个围绕着喜马拉雅山东端的最高峰——南迦巴瓦峰(海拔7787米)做了一个马蹄形大转弯的奇特峡谷。1998年9月18日国务院代表中国政府将其命名为“雅鲁藏布大峡谷”,它是世界上最深、最长、海拔最高的河流大峡谷。
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