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2012年5月10日,受蒙古低压前部分裂的冷空气和当地高原对流云团的共同影响,岷县山区骤降历史罕见的特大暴雨,导致纳纳河等多条沟道发生暴洪泥石流灾害,给人民生命财产及工农业生产带来严重的危害。本文在收集和调查暴雨资料的基础上,通过典型河段的洪水调查,分析计算了本次暴雨和洪水的量级,探讨了暴雨洪水的变化特性和成因,提出了防治措施,为今后山洪灾害预警和采取有效措施提供技术支持。
On May 10, 2012, due to the combined effect of cold air fracturing in front of the low pressure of Mongolia and the convective cloud over the local plateau, a storms hit rare in the Minxian mountainous area that caused a sudden flash flood, leading to flash floods and mudslides in many channels such as the Nanao River Disasters, to the people’s lives and property and industrial and agricultural production has brought serious harm. Based on the collection and investigation of storm data, this paper analyzes and calculates the magnitude of the heavy rain and flood, analyzes the characteristics and causes of the storm flood, and puts forward the prevention and control measures for future floods and floods Early warning and take effective measures to provide technical support.