随着城市化进程加快,城市内涝问题越来越突出。为解决因下垫面硬化引起的城市内涝问题,探求建设项目中雨水池容积计算方法。本文以北京市房地产建设项目为研究对象,从北京市1953—2012年降雨数据中选取降雨量最大、平均和最小年的日降雨数据,并拟定中水同时用于绿化和道路浇洒,应用日水量平衡模型方法,对比分析雨水池可利用率和中水补给率变化趋势,综合考虑经济效益因素,确定雨水池适宜容积。应用多项式拟合法,得到雨水池适宜容积简易计算模型。结果表明:随着雨水池容积增加,雨水池可利用率增大(0~1),中水补给率减小(1~0);当雨水池容积增至一定程度,其可利用率与中水补给率的变化趋于平缓;3种年况的雨水池可利用率的关系为最大>平均>最小,中水补给率的关系为最大<平均<最小,为互补趋势;效益费用比随着雨水池容积增大而减小。经验证,模型符合工程建设要求,且具普遍性,可投入应用。为提高模型可靠性,应用时宜将模型计算结果与规范最低建设标准进行校核比对。本研究为今后雨水池设计提供了一种新的快捷简便算法,丰富了设计理论。 As the process of urbanization accelerates, the problem of waterlogging in cities becomes more and more prominent. In order to solve the problem of urban waterlogging caused by the under-surface hardening, the method of calculating the volume of rainwater pool in construction projects is explored. In this paper, Beijing real estate construction projects as the research object, from the Beijing 1953-2012 rainfall data, select the maximum rainfall, the average and minimum annual rainfall data, and the development of water at the same time for greening and road irrigation, the application date Water balance model method, comparative analysis of rainwater pool availability and water recharge rate trends, considering the economic benefits, to determine the appropriate volume of the stormwater pool. Applying the polynomial fitting method, a simple calculation model of suitable volume of rainwater pool is obtained. The results showed that with the increase of rainfall pool, the availability of rainwater pool increased (0 ~ 1) and the recharge rate decreased (1 ~ 0). When the stormwater pool volume increased to a certain degree, The change of water recharge rate tends to be gentle. The relation between the availability of rainwater pool and the recharge rate of the three kinds of years is maximum> average> Rainpool volume increases and decreases. It is verified that the model conforms to the requirement of project construction and is universal and can be put into application. In order to improve the reliability of the model, the calculation results of the model should be checked and compared with the minimum construction standards. This study provides a new quick and easy algorithm for the design of stormwater basin in the future and enriches the design theory.