Application of System Dynamics to Sustainability Management of Water Quality in Tapeng Bay

  • 鍾 易達

Student thesis: Master's Thesis


The Tapeng bay is the biggest lagoon in Taiwan which located between Donggang town and Linbian township. Water territory within the bay used to have the highest density of oyster farming. After the Tapeng Bay National Scenic Area being established, all kinds of plans and constructions have started to be proceeded. Not only were the oyster-culture racks dismantled, but also a series of environmental improvement constructions were in progress. Also, the tour spots around the Area are united to establish an integrated national-level center of water recreation. However, the exploitation of recreational and tourist facilities may cause excessive impacts or even unrecoverable damages on the sensitive and fragile ecological environment at the bay area. Therefore, the concept of sustainable development should be the fundamental managing principle for the economic development and environmental protection in Tapeng Bay area.
In order to realize the possible influences and feedback effects of tourist development to water quality and environment under different managing strategies, the theories of System Dynamics (SD) were applied to the water quality sustainable management model and Decision Support System (DSS) of Tapeng Bay area. Hence, the purposes of this study are: first, to identify the impacts of tourist development on water quality and environment; second, to establish a simple-operative decision support system of water quality sustainable management; and third, to figure out the proper strategies of water quality sustainable management for the area of Tapeng Bay .
The system modules, numerical model and DSS were developed based on the SD software of VENSIM in consideration of various factors related to the water quality and number of tourists. Then according to different policy considerations, selected multiple scenarios were conducted to simulate, predict, and estimate the long-term effects and possible trends of system behavior in order to effectively assist the decision makers to make judgments upon the most proper management strategy.
In order to achieve the purpose of “water quality sustainable management in Tapeng Bay area,” this study has proposed multiple improvement strategies for scenario simulations, which consist of single scheme and combined schemes on wetland wastewater treatment, treatment of sewage water from tourist areas, efficiency improvement of water convection at lagoon mouth, quantity control of aquaculture wastewater drainage, and quantity control of pasturage wastewater drainage. In addition, in order to improve the user convenience and enhance the manipulating ability of numeric model, this study also established a friendly interface to support decision making. Users are able to adjust the decisive parameters in the module according to their personal experiences and policy consideration.
Date of Award2009
Original languageEnglish
SupervisorZsu-Hsin Chuang (Supervisor)

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