| 黄河下游河型的特性及成因探讨 |
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| 引用本文： | 王随继.黄河下游河型的特性及成因探讨[J].地球学报,2003,24(1):73-78. |
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| 作者姓名： | 王随继 |
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| 作者单位： | 中国科学院地理科学与资源研究所，北京，100101 |
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| 基金项目： | 国家自然科学基金项目(编号:4010003)，中国科学院地理科学与资源研究所知识创新领域前沿项目 |
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| 摘 要： | 黄河下游具有辫状河流、弯曲河流和微弯顺直河流3种河型，从横断面上可见，辫状河段的河道变化最频繁且最不稳定，微弯顺直河段最稳定；而弯曲河段明显向上游延伸，随着输沙量在各河段的阶段性变化，冲淤 状况在各河段也表现出阶段性，但加积升高是各河段发展的总趋势，从河相关系可见，弯曲河段和微弯顺直河段基本相似，但和辫状河段有着本质的区别。辫状河段的演变主要受到中上游来水来沙等自然因素的综合影响，但其更大范围的摆动仍然受到人为作用的影响；弯曲河段是河流自动调整的必然结果，两岸河堤对它的形成及向上游的延伸具有促进作用，但对它侧向迁移的特性具有较大的限制作用；而微弯顺直河段是人力强迫下河流局部调整的产物。
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| 关 键 词： | 河型 河性 沉积作用 河相关系 |
Channel Pattern Specialities and the Formation of the Lower Reaches of the Yellow River |
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| WANG Sui-ji.Channel Pattern Specialities and the Formation of the Lower Reaches of the Yellow River[J].Acta Geoscientia Sinica,2003,24(1):73-78. |
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| Authors: | WANG Sui-ji |
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| Institution: | Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101 |
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| Abstract: | There are three channel patterns along the Lower Yellow River, namely braided, meandering and straight. The cross sections of the three different channel reaches show that the braided channel varies frequently whereas the straight channel seems quite stable. The meandering reach is slowly extended upstream. The sedimentation or erosion is not continuous with the variation of annual transported sediments, but the aggradation is the general trend along the whole Lower Yellow River. The river regimes of the meandering and straight reaches are very similar to each other but are different completely from the regime of the braided reach. The braided channel evolvement results mainly from natural factors such as discharge and sediment supply; nevertheless, man behavior restrains the channel lateral migration in wider range. The meandering channel is the autoregulative result of a stream. The artificial banks accelerate its extension and restrict its continual lateral migration. The formation of the straight channel is mainly caused by man-made banks. |
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| Keywords: | channel pattern river character aggradation river regime |
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