考虑风场作用的城市建筑区产流特征  

Runoff generation characteristics of urban building areas considering the effect of wind fields

作　　者：罗渝复 林凯荣 方煜铭 张靖文 张清涛 庄鲁文 朱涵 陈刚[3] LUO Yufu;LIN Kairong;FANG Yuming;ZHANG Jingwen;ZHANG Qingtao;ZHUANG Luwen;ZHU Han;CHEN Gang(School of Civil Engineering,Sun Yat-Sen University,Guangzhou 510275,China;Guangdong Key Laboratory of Marine Civil Engineering,Guangzhou 510275,China;Guangzhou Branch of Guangdong Hydrology Bureau,Guangzhou 510140,China)

机构地区：[1]中山大学土木工程学院,广州510275 [2]广东省海洋土木工程重点实验室,广州510275 [3]广东省水文局广州分局,广州510140

出　　处：《南水北调与水利科技（中英文）》2024年第4期728-735,共8页South-to-North Water Transfers and Water Science & Technology

基　　金：广东省基础与应用基础研究基金卓越青年团队项目(2023B1515040028);广东省水文局项目(440001-2023-10716)。

摘　　要：为探究风场与建筑物对城市建筑区产流的影响,采取理论与实验相结合的研究方法,考虑风场与建筑区特征,提出一个建筑区产流计算公式。通过降雨径流实验对公式的合理性进行验证,实验结果与公式计算结果相近,表明公式在一定程度上反映建筑区产流特征。对于独栋建筑与松散建筑区,风场对产流有直接影响,建筑区产流量随降雨倾角增大而减小;对于密集建筑区,建筑区产流受风场与建筑区自身特征影响,产流量随建筑密度增加呈先增后减的趋势。在不同降雨倾角与不同建筑密度下,对建筑区产流进行计算,结果表明:降雨倾角不同时,建筑密度对产流量影响也不同;降雨倾角较大时,密集建筑区产流量随建筑密度增大而增大。With the rapid pace of urbanization in the past few decades,both the height and density of buildings within cities experienced a noticeable surge.This transformation not only altered the skyline but also introduced new dynamics to natural processes,notably in the interplay between wind fields and rainfall runoff.This study delved into the intricate relationship between wind fields and their influence on runoff within built environments.Under the action of wind,raindrops tend to fall obliquely with an angle and form inclined rainfall.Inclined rainfall is intercepted by buildings with large heights.Meanwhile,part of the area behind the building is shielded due to the existence of the building.According to the phenomenon discussed above,this study endeavored to improve the existing methods of runoff calculation specific to building areas.The proposed formula includes five terms,which are ground runoff,building wall runoff,roof runoff,ground infiltration and evaporation during rainfall period.To improve the accuracy of the proposed formula,the dynamic characteristics of wind field and the characteristics of building areas were considered.The dynamic characteristics of wind field were reflected by adopting reduction factors.The characteristics of building areas were reflected by including the shielding effect between buildings.The shielding effect between buildings existed when the building distance is smaller than the length of shielded area.Rainfall runoff experiments were conducted to validate the soundness of the improved formula.Different scenarios with different inclined rainfall angle and building environments were designed.The experimental results closely mirrored the outcomes predicted by the formula,underscoring its effectiveness in capturing the flow characteristics unique to building areas.This correlation served as a testament to the formula's reliability.Buoyed by this success,the study embarked on an extended exploration of runoff patterns within urban construction zones.In the case of single-family dwe

关 键 词：建筑区 风场 产流计算 建筑密度 降雨径流实验 

分 类 号：TV122[水利工程—水文学及水资源]