Potential contributions to Beijing's water supply from reuse of storm-and greywater  

雨水和中水回用对北京供水的潜在贡献(英文)

作　　者：刘栗[1,2] Marina Bergen Jensen 孟庆一 

机构地区：[1]哥本哈根大学地球科学和自然资源管理系 [2]中国丹麦科研教育中心,北京100191 [3]北京水科学与技术研究院,北京100048

出　　处：《Journal of Southeast University(English Edition)》2014年第2期150-157,共8页东南大学学报（英文版）

摘　　要：In order to find new approaches to alleviating the water crisis in Beijing which is caused by among others dwindling precipitation and rapid growth of population and manifests in a rapidly declining groundwater table this study explores decentralized stormwater harvesting and greywater reuse at household level as a means to reduce groundwater abstraction and water transfer from other regions.Based on a desktop case study two concepts for combined harvesting and reusing of storm-and greywater are presented.With rough pre-assumptions calculations show that a saving of 67.8%of tap water consumption can be achieved with the upgrading concept compared with 5.9% with the simple downgrading concept.The saving with the upgrading concept equals 0.545 ×109 m3 annual water volume if 20 million Beijing people apply this approach.Despite numerous prerequisites such as water treatment technology space demand energy and cost and public acceptance this paper advocates combining stormwater harvesting and greywater reuse in households with other measures for Beijing’s sustainable water management.为寻找新途径以缓解北京市因日趋减少的年降水量和人口快速增长等因素引起的水危机,及地下水位迅速下降的状况,探讨了基于住户的分散式雨水收集和中水回用,作为减少地下水抽取和从其他地区调水的手段.通过案头案例研究,提出了雨水和中水结合式收集再利用的2个理念.基于粗略假设,计算表明采用升级理念可节约生活自来水消费的67.8%,而采用降级理念则节约5.9%.如果2 000万北京市民采用升级理念,将节约相当于0.545×109m3的年供水量.尽管先决条件诸多,如水处理技术、空间需求、能源和成本,以及公众接受能力,主张采用住户雨水收集和中水回用与其他措施相结合,以实现北京可持续的水管理.

关 键 词：urban water cycle water supply water reuse 

分 类 号：TV213[水利工程—水文学及水资源] TU991.11[建筑科学—市政工程]