Abstract：
The growing generation of construction and demolition waste (CDW) has emerged as a prominent challenge on global environmental agendas. However, the effectiveness of CDW management (CDWM) strategies varies among cities. Existing literature predominantly evaluates the effectiveness of CDWM at the project level, offering a localized perspective that fails to capture a city\'s comprehensive CDWM profile. This localized focus has certain limitations. To fill this gap in city-scale evaluations, this study introduces a novel model for assessing CDWM effectiveness at the municipal level. An empirical investigation was conducted across 11 cities within the Guangdong-Hong Kong-Macao Greater Bay Area (GBA) to operationalize this model. The model defines five distinct levels of CDWM effectiveness. Findings indicate that Hong Kong consistently achieves the highest level (level I), while the majority of cities fall within levels III and IV. This pattern suggests that CDWM effectiveness in the GBA is moderately developed, with uneven progress in CDW management outcomes and supporting systems. Essentially, there is a lack of synchronous development of CDWM results and guarantee systems. The proposed evaluation model enriches existing CDWM research field and offers a framework that may inform future studies in other countries.
摘要：
越来越多的建筑和拆除废物(CDW)已成为全球环境议程上的一个突出挑战。然而,CDW管理(CDWM)策略的有效性因城市而异。现有文献主要评估CDWM在项目层面的有效性，提供本地化视角，无法捕获城市的全面CDWM配置文件。这种局部聚焦具有某些局限性。为了填补城市规模评估的这一空白，这项研究引入了一种新的模型来评估市一级的CDWM有效性。在粤港澳大湾区（GBA）内的11个城市进行了实证调查，以实施该模型。该模型定义了CDWM有效性的五个不同级别。调查结果显示，香港一贯达到最高水平(一级)，而大多数城市属于三级和四级。这种模式表明CDWM在GBA中的有效性是适度发展的，CDW管理成果和支持系统的进展不平衡。本质上,缺乏CDWM结果和保障体系的同步开发。拟议的评估模型丰富了现有的CDWM研究领域，并提供了一个框架，可以为其他国家的未来研究提供信息。
