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主要论述了河川枯水径流与极值的基本特征——枯水流量、枯水发生时间等，重点分析研究了枯水径流与极值形成的机理，即影响枯水径流极值形成机理的地带性因素——气候、植被等，以及枯水径流产生机理的非地带性因素——地质（包括水文地质）、地形地貌和人为因素。通过综合分析认为：不同地带的降水量对枯水径流产生重要的影响；土壤、植被是影响河川枯水径流不可低估的因素；地形对枯水极值有较大的影响；不同地质岩性，因透水性能等的差异，对枯水量及其变化都有不同程度的作用
Mainly discusses the basic characteristics of the runoff and extreme value of the low water flow - the low flow rate, the time of low water flow, and analyzes the mechanism of the low water runoff and extreme value formation, which is the zone affecting the extremum formation of the low water runoff Sexual factors - Non-zonal factors of climate, vegetation, etc., as well as the mechanisms of runoff generation - geology (including hydrogeology), topography, and human factors. The comprehensive analysis shows that the precipitation in different areas has a significant impact on the runoff. The soil and vegetation are the factors that can not be underestimated in the runoff of the river. The topography has a great influence on the extreme value of the low water. Due to differences in water permeability and other effects on the amount of dry and its changes have varying degrees of effect