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黄河源头为什么有那么多水

更新时间: 2020-11-06 00:00:00     

黄河发源于青藏高原巴颜喀拉山北麓的约古宗列曲,源头是泉水,涓涓细流。越往下游,流域面积增大,汇集大量的支流,水量不断增加。虽然有些河段因为下渗、蒸发和工农业用水增加等导致河流水量有所减少,但是总体来说,黄河从源头到下游,补给水量大于流失的水量,所以水量总体呈增加趋势,到下游已经变成一条水量很大的河流,最大年径流可达938.66亿立方米。

关键词: 黄河 源头 为什么 那么

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