Meirlaen J, Vanrolleghem P A
BIOMATH, Ghent University, Gent, Belgium.
Water Sci Technol. 2002;45(4-5):373-81.
Real time control is one of the possibilities to minimise the impact of the integrated urban wastewater system (sewer system and treatment plant) on the receiving water quality. Integrated control uses information about the river state to act in the sewer system or in treatment plant. In order to test and tune these integrated controllers, a simplified integrated model is needed. Even with these simplified models, the simulation times may be too long and further model reduction is needed. In this paper, dependency-structure based model reduction is proposed as a technique to further reduce model complexity. Three steps are proposed: relocation of the upstream system boundaries to just upstream of the first control point, relocation of the downstream boundaries to just downstream of the last measurement point, and third, a further model simplification based on an analysis of the sensitivity of the control actions on submodel elimination. The effect of applying the different reduction approaches on the control strategy and on the resulting river water quality is discussed on the basis of a case study of the catchment of Tielt.
实时控制是将城市综合污水系统（下水道系统和污水处理厂）对受纳水体水质的影响降至最低的一种可行方法。综合控制利用有关河流状态的信息在下水道系统或污水处理厂中采取行动。为了测试和调整这些综合控制器，需要一个简化的综合模型。即使有了这些简化模型，模拟时间可能仍然过长，还需要进一步简化模型。本文提出基于依赖结构的模型简化作为进一步降低模型复杂性的技术。提出了三个步骤：将上游系统边界重新定位到第一个控制点的上游，将下游边界重新定位到最后一个测量点的下游，第三，基于对控制行动对子模型消除的敏感性分析进行进一步的模型简化。基于蒂尔特集水区的案例研究，讨论了应用不同简化方法对控制策略和最终河流水质的影响。
