家庭单元是水资源与能源的消费终端，作为水与能源消费的基本载体，系统解析家庭单元水与能源相互关系是研究水与能源纽带关系的重要内容。在气候变化和城市化发展背景下，近20年我国城市生活水与能源消费分别增加1.3倍和2.5倍，合理控制城市水与能源消费过快增长是当前城市管理工作的重要任务。本项目将以北京市为例，通过问卷调查结合典型家庭用水用能观测实验，试图（1）从家庭生命周期阶段解析个体用水、用能的行为机制，从活动链角度识别家庭对水与能源的需求关系；（2）通过实证研究和要素需求理论，阐述家庭微观尺度水与能源纽带关系；（3）基于系统动力学理论和方法，建立具有物理机制的家庭生活水与能源耦合模型，对家庭内部进行水能仿真模拟，并在典型小区进行实例研究，以促进家庭水资源与能源的高效利用。研究成果可为城市水资源管理、能源管理提供理论支撑和工具。

Household unit is the basic carrier of water and energy consumption, it is an important content to analyze the relationship between water and energy in the household units as a part of the water-energy nexus research. In the context of climate change and urbanization, the consumption of urban domestic water and energy in China has increased by 1.3 times and 2.5 times respectively in the past 20 years. It is an important task of urban management to control the excessive growth of urban water and energy consumption. This project will take Beijing as an example, through questionnaire survey and typical household water and energy use observation experiment, try to (1) analyze the behavior mechanism of individual water use and energy use in different family life cycle stages, and identify the relationship between household demand for water and energy from the perspective of activity chain. (2) Through empirical research and factor demand theory, elaborate the micro scale water-energy nexus within household. (3) Based on the theory and method of system dynamics, a coupled model of domestic water-energy system is planned to be established to simulate the household water-energy system. A case study will carried out in a typical residential area to promote the efficient utilization of domestic water and energy resources. The research results will provide theoretical support and supporting tools for urban water resources management and energy management.