降雨强度对马莲河洪水含沙量的影响

发布时间：2018-03-07 06:18

本文选题：含沙量　切入点：流量　出处：《人民黄河》2017年11期 　论文类型：期刊论文

【摘要】：2016年8月15日,马莲河洪德水文站出现了洪峰流量656 m~3/s、沙峰含沙量916 kg/m~3的洪水。为分析该类洪水发生频率及高含沙洪水产生原因,利用实测资料分析了洪德站1958—2016年最大洪峰流量和沙峰含沙量的变化特点,对洪水频率进行了计算,结果显示马莲河"2016·8"高含沙洪水的重现期为2.1 a,沙峰含沙量在年最大含沙量变化范围内。通过对1977—1990年和2006—2016年日降雨量大于30 mm的61场降雨进行分析,分别建立了洪德站洪峰流量与特征降雨强度、沙峰含沙量与最大1 h降雨强度的关系。结果表明:洪峰流量与特征降雨强度成幂函数关系;降雨强度小于18 mm/h时沙峰含沙量与最大1 h降雨强度成线性正比关系,降雨强度大于18 mm/h时沙峰含沙量保持在900 kg/m~3左右。
[Abstract]:In August 15th 2016, flood occurred in Hongde Hydrological Station of Malian River with Hong Feng discharge of 656mt / s and sediment content of 916 kg/m~3. In order to analyze the frequency of such floods and the causes of high sediment flood, Based on the measured data, the variation characteristics of maximum Hong Feng discharge and sand peak sediment concentration in Hongde station from 1958 to 2016 are analyzed, and the flood frequency is calculated. The results show that the recurrence period of "2016 路8" high sediment flood in Malian River is 2.1 a, and the peak sediment concentration is within the range of maximum annual sediment concentration. 61 rainfall events with daily rainfall of more than 30 mm in 1977-1990 and 2006-2016 are analyzed. The relationships between Hong Feng discharge and characteristic rainfall intensity, sand peak sediment content and maximum rainfall intensity of 1 hour were established respectively. When the rainfall intensity is less than 18 mm/h, the sediment content of the sand peak is linear proportional to the maximum rainfall intensity of 1 h. When the rainfall intensity is greater than 18 mm/h, the sediment content of the peak is kept at about 900 kg/m~3.
【作者单位】：黄河水利科学研究院;
【分类号】：P333;TV122

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