Advances in Constructional Engineering

With the promotion of green building concepts, the collaborative design of rainwater harvesting and water supply and drainage systems has gradually become a critical issue in architectural design. By studying the integration of rainwater harvesting systems with water supply and drainage systems, this paper proposes a design approach for their synergistic operation. It analyzes the interaction mechanisms between rainwater harvesting systems and internal and external building water supply and drainage systems, and explores how to optimize water resource utilization efficiency and enhance building sustainability. The design considers the linkage of rainwater storage, purification, utilization, and drainage systems, thereby achieving the green building goals of water conservation and emission reduction. The results indicate that reasonable collaborative design can not only significantly improve water resource utilization but also reduce building operating costs, providing practical technical support for green building development.

Green building; Rainwater harvesting; Water supply and drainage system; Collaborative design; Water resource management