Using system engineering theory and method, system model and simulation method, the paper analyses the conflict between supply and demand of water resources within the system.
文章用系统工程的理论和方法，用系统模型和模拟的方法，分析系统内水资源的供给与需求。
Used for industrial and civil architecture roofing, basement, tunnel, tunnels, water supply and drainage pool, water pumping station, etc have waterproof impermeable concrete engineering requirements.
用于工业与民用建筑的屋面、地下室、隧道、巷道、给排水池、水泵站等有防水抗渗要求的混凝土工程。
Abstract: : building water supply and drainage engineering construction and installation of the project is an important part, its installation quality of will directly affect people's use.
䧝摘要：建筑给排水工程是建筑安装工程的重要组成部分，其安装质量的好坏将直接影响人们的使用。
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