摘要
据统计,融雪洪水约占新疆洪水总数的39%,受连续高温天气影响时部分融雪洪水会形成较大洪峰流量;例如2015年7月23日库玛拉克河最大洪峰流量达到2090 m3/s,是有记录以来的第三大洪峰流量;故在工程设计中需对融雪洪水和暴雨洪水进行统筹考虑,避免由于遗漏项造成工程隐患。目前已经有SWAT模型、SRM模型、SHE模型等一系列的融雪洪水计算模型,但模型输入数据较多,在实际工程中的应用性较差;本文对文献和工程中常用的经验公式以及推理公式方法进行了分析和案例应用,希望能为新疆地区涉及中、高山区洪水影响的电力工程中设计洪水的分析、计算提供参考。应用结果表明,由于索科洛夫斯基公式中参数较为简单,限制因素较为单一,在某些工程中应用时可能会产生较大误差;同时推理公式中径流系数对最终结果的影响较大,最好能够通过区域实测洪水资料反推出径流系数,作为公式的输入参考。故建议在工程中应用时选取多种计算方法进行计算,应用当地实测的洪水资料对计算结果和选用的参数进行校核,选取最接近实测成果的计算方法进行工程应用。
With continuous high temperature weather, some snowmelt flood can form high peak flow. For example, in July 2015 23,the flood peak of Kumalake River is upto 2090 m3/s,being thethired recorded peak flow. So snowmelt flood and rainstorm should all be considered in the engineering design. There are SWAT, SRM, SHE and other models for snowmelt flood calculation, but they all need a large number of input data. This article has carried on the analysis and application of some calculating formulas, the result of which canprovide a reference for calculation method of snow melting flood in the middle and high mountain area for power engineering in Xinjiang provience.The accuracy of Sokolovsky formulais relatively poor because the parameters are few.Runoff coefficient in reasoning formula has large influence in the result accuracy, so it is better to calculate the coefficient according to measured flood data in the area. It is suggested that various calculation methods are used in the engineering application and the parameters should be calculated and checked according to measured flood data, and select the result which is closest to the measured results for calculation in engineering application.
出处
《电力勘测设计》
2016年第S2期72-75,共4页
Electric Power Survey & Design
