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通在黄河三门峡水文站进行1 a的连续采样分析和调水调沙期间的密集采样分析,揭示了三门峡水库水沙调控对黄河有机碳输送过程的影响。结果表明,在水库调水调沙期间,三门峡站POC含量与TSS含量同步增加,而DOC含量变化趋势不明显;在1 a内,DOC和POC含量均有明显的季节变化。三门峡站POC年通量为124.8万t,其中调水调沙期间POC输送量约占POC年通量的38%,水库敞泄期间(8~9月)的POC输送量约占POC年通量的60%;三门峡站DOC年通量为7.6万t,其中7~9月DOC输送量约占DOC年通量的52%。
Through continuous sampling analysis of 1 a at Sanmenxia Hydrology Station of the Yellow River and intensive sampling analysis during water and sediment regulation, the effect of water and sediment regulation of Sanmenxia Reservoir on organic carbon transport in the Yellow River was revealed. The results showed that during the period of water and sediment regulation in the reservoir, POC content and TSS content of Sanmenxia Station increased synchronously, but the trend of DOC content was not obvious. Within 1 year, DOC and POC content had obvious seasonal changes. The annual POC flux of Sanmenxia Station is 1,248,000 tons, of which the POC transportation volume accounts for about 38% of the POC annual flux during the period of water and sediment adjustment and the POC annual transportation volume (from August to September) Of the total annual output of DOC. The DOC annual throughput of Sanmenxia Station is 76,000 tons, of which 7 to 9 months, the DOC transportation volume accounts for about 52% of the annual flux of DOC.