吴保生, 刘可晶, 申红彬, 周丽艳. 黄河内蒙古河段输沙量与淤积量计算方法[J]. 水科学进展, 2015, 26(3): 311-321. DOI: 10.14042/j.cnki.32.1309.2015.03.002
引用本文: 吴保生, 刘可晶, 申红彬, 周丽艳. 黄河内蒙古河段输沙量与淤积量计算方法[J]. 水科学进展, 2015, 26(3): 311-321. DOI: 10.14042/j.cnki.32.1309.2015.03.002
WU Baosheng, LIU Kejing, SHEN Hongbin, ZHOU Liyan. Calculation methods for sediment load and deposition volume in the Inner Mongolia reach of the Yellow River[J]. Advances in Water Science, 2015, 26(3): 311-321. DOI: 10.14042/j.cnki.32.1309.2015.03.002
Citation: WU Baosheng, LIU Kejing, SHEN Hongbin, ZHOU Liyan. Calculation methods for sediment load and deposition volume in the Inner Mongolia reach of the Yellow River[J]. Advances in Water Science, 2015, 26(3): 311-321. DOI: 10.14042/j.cnki.32.1309.2015.03.002

黄河内蒙古河段输沙量与淤积量计算方法

Calculation methods for sediment load and deposition volume in the Inner Mongolia reach of the Yellow River

  • 摘要: 基于多沙河流"多来多排"输沙基本公式,建立了考虑上站来沙量、前期累计淤积量、临界输沙水量及干支流泥沙粒径影响的输沙量一般表达式。进而根据黄河内蒙古河段1953—2010年实测水沙资料,得到了内蒙古巴彦高勒—头道拐全河段及巴彦高勒—三湖河口和三湖河口—头道拐分河段的年输沙量公式,并根据输沙率法采用建立的输沙量公式计算了各河段1953—2010年的逐年冲淤量。选取三湖河口—头道拐河段的计算结果分析表明,在输沙基本公式基础上增加前期累计淤积量、临界输沙水量及干支流泥沙粒径参数,所得公式计算的年冲淤量与实测值之间的相关系数R2由基本公式的0.41依次提高到0.50、0.75和0.80,说明在基本公式基础上进一步考虑这些参数的必要性。此外,全河及分河段输沙公式计算所得输沙量及各河段冲淤量和累计淤积量与实测值的符合程度均较好,表明建立的输沙公式能够用于不同水沙条件下的输沙量和冲淤量计算,可为分析内蒙古河段的输沙特性和长期淤积趋势提供参考。

     

    Abstract: Based on the basic sediment transport equation that reflects the characteristics of "more input, more output" for sediment-laden flow rivers, a general sediment transport expression was developed, which can take into account the effects of upstream sediment input, previous cumulative sediment deposition, critical water volume for sediment initiation, and sediment sizes of mainstem and tributary. Then annual sediment load equations for the whole Inner Mongolia reach from Bayangaole to Toudaoguai and for the sub-reaches from Bayangaole to Sanhuhekou and from Sanhuhekou to Toudaoguai were obtained based on measured data for the Inner Mongolia reach of the Yellow River from 1953 to 2010. And then annual deposition volumes at each river reach were calculated using the proposed equations for years from 1953 to 2010 according to the principle of sediment conservation. Analysis of results for the selected river reach from Sanhuhekou to Toudaoguai shown that the determination coefficient R2 between measured and calculated annual amount of erosion and sedimentation was raised from 0.41 for using the basic transport equation to 0.50, 0.75 and 0.80, respectively, by successively adding the parameters of upstream sediment input, previous cumulative sediment deposition, critical water volume for sediment initiation, and sediment sizes of mainstem and tributary. This indicated the necessity of including these parameters at top of the basic transport equation. In addition, annual deposition and cumulative deposition volumes calculated using the proposed sediment transport load equations for the whole reach and the sun-reaches were in good agreement with measurements. This indicated that the proposed methods can be used for calculation of annual sediment load and deposition volume under different flow and sediment load conditions and for analysis of sediment transport and long-term trend of sediment deposition in the Inner Mongolia reach of the Yellow River.

     

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