2012年黄河1、2号洪峰特点分析

Analysis on the Characteristics of the First and the Second Flood Peaks Occurred in the Yellow River in 2012

对2012年黄河干流1、2号洪峰相应的洪水特点等进行了分析,结果表明:1号、2号洪峰吴堡站次洪水量分别为3.20亿、2.78亿m3,府谷—吴堡区间无控区加水比例分别为43.4%、55.0%;洪水以府谷—吴堡区间来水为主,陡涨陡落,峰高量小;第一次洪水在吴堡—龙门区间的洪峰传播时间较长;小北干流未发生明显漫滩,与历史同量级洪水相比削峰率较小。建议加强对河口镇—龙门区间产汇流机理及演进规律的研究,探索建立无控区洪水预报模型,同时对汛期站网布设的合理性进行深入分析和适当调整。

This paper analyzed the characteristics of No.1 and No.2 flood peaks in the Yellow River in 2012.The results indicate that the flood amount of No.1 and No.2 in Wubao Station is 0.320 billion m3 and 0.278 billion m3 respectively and the flood runoff proportion of inflow from tributaries in Fugu-Wubao region is 43.4% and 55.0% respectively;the flood runoff mainly comes from Fugu-Wubao region with the characteristics of steep rising and steep dropping,high peak and less quantity.The first flood runs over a long period of time in Fugu-Longmen region;Xiaobeiganliu section does not occur overbank flood and the peak clipping rate is small comparing with the same magnitude historical floods.It is suggests to strengthen the study on runoff yield mechanism and evolution laws in Hekou-Longmen region;to establish the flood forecast model in uncontrolled area,and to analyze the rationality of the precipitation monitoring station network of flood season and make appropriate adjustment if necessary.