An Object-Oriented Intelligent Engineering Design Approach for Lake Pollution Control

ZOU Rui1, ZHOU Jing2, ZHU Xiang3,ZHAO Lei 3, LIU Yong2, YANG Ping-jian2, GUO Huai-cheng2

(1.Tetra Tech, Inc, 10306 Eaton Place, Ste 340, Fairfax, VA 22030, USA; 2.The Key Laboratory of Water and Sediment Sciences, Ministry of Education, College of Environmental Science and Engineering, Peking University, Beijing 100871, China; 3. Yunnan Institute of Environmental Science, Kunming 650034, China)

 Abstract:Regarding to the shortage and deficiency of traditional lake pollution control engineering technical, this paper proposed a new lake pollution control engineering approach based on object-oriented intelligent design from the perspective of intelligent. This can provide a new methodology and idea for controlling lake pollution and improving water quality effectively. This also can help decision-making related to lake pollution control in future. Based on analyzing the differences between the traditional engineering technical and the object-oriented intelligent design approach, this paper proposed the key features of the object-oriented intelligent design approach. That is object perspective, cause and effect foundation, set points into surface, time and space optimization. Blue algae control in lake was taken as a example in this paper. The effect of algae control and water quality improvement were detailed analyzed from the perspective of object-oriented intelligent design based on two engineering technical (vertical hydrodynamic mixer and pumping algaecide recharge). The main results were as follow: It cannot provide scientific and effective guidance for engineering design and decision-making of lake pollution in traditional engineering design paradigm. Intelligent design approach is based on the object perspective and quantitative causal analysis in this case. This approach identified that the efficiency of mixer were much higher than pump for the goal of low to moderate water quality improvement (such as the control objective of peak Chl a concentration was 70μg·L-1 in this experimental water). But when the objective of water quality exceed a certain value (such as the control objective of peak Chl a concentration was exceed 100μg·L-1 in this experimental water), the mixer cannot be achieved this goal. Pump technical can achieve but this also means more cost. The efficiency of combining the two technical together were higher than using one of the two technical alone. Moreover, the quantitative scale control of the two engineering technical had a significant impact on actual project benefits and costs. This showed the importance and potential for applying the object-oriented intelligent design approach.

Key words:  object; intelligent design; lake pollution; control engineering