CAJ | 학술논문

提北京城市内涝数值模型（BUW）根据北京复杂地形和大城市特点，将各类空间信息剖分为6458个网格及相应的通道，围绕城市地表、河道沟渠、排水管网等城市主要水文水动力学物理过程，模拟积水深度变化情况。以精细化的降水监测为驱动条件，BUW 可以较好地模拟出“7·21”城市内涝积水的空间分布，对重点桥区的积水深度，积水过程的模拟也比较贴近实际，具有良好的模拟性能。360 min 历时的2年重现期降雨情景下，北京四环内就会产生一定的积水，以孤立的积水点为主。10和50年重现期下，积水的深度和范围都有所增加，且开始呈片状。100年重现期，整个五环内都出现严重的城市积水，南部出现大片超过50 cm 的积水区域，部分地区积水超过80 cm。面对“7·21”级别的降水，排水管网直径拓宽20％并不能明显改善城市排水能力。拓宽60％时，四环到五环之间的积水明显减弱，四环以内的大部分积水减弱。拓宽100％时，仅在二环到四环之间还有一些较浅的积水，拓宽140％时，六环内大部分积水消失。
제북경성시내로수치모형（BUW）근거북경복잡지형화대성시특점，장각류공간신식부분위6458개망격급상응적통도，위요성시지표、하도구거、배수관망등성시주요수문수동역학물리과정，모의적수심도변화정황。이정세화적강수감측위구동조건，BUW 가이교호지모의출“7·21”성시내로적수적공간분포，대중점교구적적수심도，적수과정적모의야비교첩근실제，구유량호적모의성능。360 min 력시적2년중현기강우정경하，북경사배내취회산생일정적적수，이고립적적수점위주。10화50년중현기하，적수적심도화범위도유소증가，차개시정편상。100년중현기，정개오배내도출현엄중적성시적수，남부출현대편초과50 cm 적적수구역，부분지구적수초과80 cm。면대“7·21”급별적강수，배수관망직경탁관20％병불능명현개선성시배수능력。탁관60％시，사배도오배지간적적수명현감약，사배이내적대부분적수감약。탁관100％시，부재이배도사배지간환유일사교천적적수，탁관140％시，륙배내대부분적수소실。
Based on the complex terrain and large city characteristics,the geographic information of Beijing was cut into 6458 grids and corresponding channels.Focused on the urban hydrodynamic and hydrographic process,the Beijing Urban Waterlogging (BUW)numerical model was built to simulate the ponding depth.Driven by high-resolution precipitation observation,BUW can simulate the spatial distribution of the 21 July 2012 urban ponding in Beijing well,and the variation and max depth under concave bridges are close to actual condition too.In the scene of 2-yr Return Period (2-RP),there are some isolated ponding points inside the 4-Ring Road.The depth and range of ponding increase in 10-RP and 50-RP.Under 100-RP,there is servere pondings within the whole 5-Ring Road with most exceeding 50 cm in the south.Fa-cing the rainfall at the 21 July 2012 level,urban drainage will not be improved obviously with 20% of pipe diameter (20%+PD)broadening.The ponding gets relieved distinctly between the Roads of 4-Ring and 5-Ring and slightly inside the 4-Ring in 60%+PD experiment.When the pipe diameter is broadened continu-ously,there is only shallow ponding between the 2-Ring and the 4-Ring in 100%+PD experiment and no ponding insides the 6-Ring in 140%+PD experiment.