太原市高校不同下垫面条件下降雨径流系数试验研究  

Experimental Study on Rainfall Runoff Coefficient under Different Underlying Surface of Universities in Taiyuan City

作　　者：张凯凯[1] 马娟娟[1] 孙西欢[1] 郭向红[1] 任荣[1] 冯晓波[1] 

机构地区：[1]太原理工大学水利科学与工程学院,太原030024

出　　处：《节水灌溉》2014年第12期29-32,共4页Water Saving Irrigation

基　　金：国家自然科学基金项目(51109154;51249002);山西省青年科技研究基金资助项目(2012021026-2);高等学校博士学科点专项科研基金(20121402110009;20111402120006);山西省科技攻关项目(20110311018-1)

摘　　要：雨水积蓄利用工程是一种可持续性的节水工程。在确定蓄水池规模而进行的可积蓄雨量计算时,为了合理的选取径流系数值,进行了室外实地径流系数模拟试验。本次试验选取了沥青路面、水泥路面、透水性铺装三种下垫面,降雨强度(四个水平)、地面坡降(三个水平)、降雨历时三个变量,研究了径流系数与变量之间的关系。结果表明,水泥路面与沥青路面变化规律基本一致,径流系数均随降雨强度、降雨历时、地面坡降的增大而增大;透水性铺装在雨强较小时,径流系数与坡降成负相关关系,当降雨强度较大时,径流系数与坡降成正相关关系。通过对不同降雨强度、地面坡降、降雨历时条件下径流系数变化规律的研究,可以为雨水积蓄利用工程中确定可积蓄雨量的多少、确定蓄水池规模的大小、集雨工程的推广奠定理论依据。Rainwater harvesting and utilization engineering is a kind sustainable water saving engineering.In the calculation of rainwater harvesting quantity for determination of the reservoir scale,an outdoor field simulation experiment for runoff coefficient is conducted in order to select reasonable runoff coefficient.The experiment selects three kinds of underlying surface,including asphalt pavement,cement pavement and drainage pavement,to study the relationship between runoff coefficient and three variables,namely rainfall intensity（including four levels）,ground slope（including three levels）and rainfall duration.The results show that the change law of cement surface and the asphalt pavement is the same,the runoff coefficients increases with the increases of rainfall intensity,rainfall duration and ground slope;While for drainage pavement,the relationship between runoff coefficient and ground slope is negative for lower rainfall intensity and positive for larger rainfall intensity.The study on change law of runoff coefficient with different rainfall intensity,ground slope and rainfall duration supply theoretical base for the determinations of rainfall harvesting quantity and the reservoir scale and the promotion off rainwater harvesting project.

关 键 词：径流系数 降雨强度 地面坡降 降雨历时 

分 类 号：S275.9[农业科学—农业水土工程]