【摘要】 华北平原特别是北京地区几十年来经济建设发展,使下垫面状况发生了很大变化。本研究以不同下垫面条件下小流域降雨入渗产流规律为基础,应用Nash单位线汇流方法进行排涝模数计算的研究,提出了目前条件下排涝模数计算的解决方案,即以经验排涝模数乘以折减系数0.6～0.7后的数值,可供现今河道排涝设计时应用。更多还原

【Abstract】 The economy development in the North China Plain especially in Beijing area in the lately decades has greatly changed the lower-lying situation of hydrological circle.Based on the rainfall-runoff relationship in small watershed with different lower-lying condition,and by means of Nash’s instantaneous unit curve method,the drainage modulus has been analyzed and the calculation method of drainage discharge has been presented in the study.I.e.the experiential drainage modules multiplied the coefficient 0.6～0.7could be used for the drainage designs of rivers.更多还原