复杂水资源系统调蓄计算的时变耦合模型

Time-variant coupling model for regulation and storage calculation of complex water resources systems

复杂水资源系统的基础结构是供用水网络,网络节点包括供水节点和受水单元,其中供水节点又分为当地地表水、地下水、外调水、再生水等若干类型.水资源系统的供用水过程是一个随时间变化的过程,由于当地地表水、外调水等来水过程随着气象过程的变化而呈现出随机性,而受水单元的需水过程相对稳定(主要取决于单元的人口、经济发展情况和季节特点).要实现水资源系统的供需平衡,往往需要增加调蓄节点,进行调蓄计算.本研究应用复杂系统网络理论,构建了复杂水资源系统调蓄计算的时变耦合模型,建立了多水源、多用户的时变耦合矩阵及其相关算法.模型被用于引汉济渭配水工程的调蓄计算,得到了不同频率年引汉济渭工程的调蓄容量需求,为引汉济渭配水工程调蓄设计奠定了基础.

Complex water resources systems generally consist of a water supply and a utility network that comprises water supply nodes and water receiving units. In such systems, the water supply nodes are divided into local surface water, underground water, transfer water and reclaimed water nodes. Because inflow processes of local surface water and transfer water vary randomly with changes in meteorological processes, the water supply process for water resources systems is time-variant; however, the water demand of receiving units is relatively steady, being primarily dependent on population, economic development and seasonal characteristics. To realize the supply and demand balance of water resources systems, regulation and storage nodes are required. In this study, a time-variant coupling model for regulation and storage calculation of a complex water resources system was constructed based on the complex system network theory, and a time-variant coupling matrix for multiple water resources and multiple users, as well as a relative algorithm was established. The model was then used for regulation and storage calculation of the Hanshui River to Weihe River Water Distribution Project. The annual demand of regulation and storage capacity for the project with different inflow frequencies was obtained, laying a good foundation for regulation and storage design of this project.