Sediment discharge to the ocean from small mountainous rivers: The New Guinea example
Sediment discharge to the ocean from small mountainous rivers: The New Guinea example
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DOI：
10.1007/bf01204453
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发表时间：
1995-09
影响因子：
2.1
通讯作者：
J. Milliman
中科院分区：
文献类型：
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作者：
J. Milliman
流经新几内亚大岛（面积= 800，000平方公里）的小型山区河流每年排放约1.7 × 109吨泥沙，与流经北美的河流的估计总负荷大致相同。新几内亚东部高山地区的河流的泥沙量特别高，因为那里的流域高，流域面积小。由于新几内亚东部大陆架一般较窄（宽不到10公里），许多河流沉积物可能直接流到邻近的深海，沉积物填充的海沟就是证明。相比之下，许多流经该岛中南部的河流流入一个相当广阔的大陆架，那里可能残留着大量沉积物，也许是沉积的泥楔。
The small mountainous rivers draining the large island of New Guinea (area = 800,000 km2) discharge approximately 1.7 × 109t of sediment annually, about the same as the combined estimated loads of rivers draining North America. Sediment yields are particularly high for rivers that drain the high mountains of eastern New Guinea, where drainage basins are high and drainage areas small. Owing to the generally narrow (<10 km wide) shelf off eastern New Guinea, much of the fluvial sediment may escape directly to the adjacent deep sea, as evidenced by the presence of sediment-filled trenches. In contrast, many of the rivers draining the south—central part of the island discharge onto a fairly broad shelf, where much of the sediment presumably remains, perhaps as prograding mud wedges.