This paper takes the debris flow in Mier River as an research object.Based on topography, geological and meteorological conditions in Mier River, it analyzes the geological environment conditions, and makes a detailed description of the characteristics and type of debris flow through field trips.%咡以云南省彝良县咪河沟泥石流为研究对象，通过对该沟所处地形地貌、地质构造、气象条件三个方面分析了该沟所处的地质环境条件，并通过实地考察详细描述了泥石流的特征和类型。
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