Southeast Yunnan is a transition zone between Yunnan-Kweichow Plateau and the dissolution plain in east Cuangxi, is the main part of karat in east Yunnan. It is where the new Pula reservoir of Malipo county established. The reservoir is on the stage of design and site selection. On the basis of collection on regional geological information, southeast Yunnan as the background and the reservoir as supporter are choosed, in order to analyse the environgeology features. Starting from the engineering geology, the decisive factor of engineering geological problems about the reservoir is summarized. It provides theory evidence for site selection of the reservoir, safety in production , maintenance and management It indicates that the character of rock, the regional tectonic and karst distribution has the decisive effect for engineering geological conditions of the small reservoir in southeast Yunnan.%滇东南位于云贵高原向桂东溶原过度地带,是滇东岩溶区的主体,新建云南省麻栗坡县普腊水库位于该区域.在收集了区域基础资料的基础上,立足于水库设计选址阶段,以滇东南为背景,以普腊水库为载体,分析了地处滇东南普腊水库的环境地质特点.从工程地质的角度出发,分析总结了水库工程地质问题的决定性因素.为滇东南新建小型水库选址、安全生产、水库维护管理提供了可借鉴的理论依据.分析认为,岩土体性质、区域构造及岩溶分布对滇东南小型水库的工程地质条件有决定性作用.
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