碩士 / 國立成功大學 / 水利及海洋工程學系碩博士班 / 97 / The purpose of this study is to simulate the aquaculture pond hydrodynamics under various quantities and position of paddlewheels using two-dimensional hydrodynamic numerical model（TW2D1）. First of all, we analyze the collected information of different ponds in the south-western coast, and then select the appropriate culture pond to measure the water depth and the hydrodynamics which can be used to verify the 2-D hydrodynamic model including a paddlewheel driven circulation module.
The 2-D hydrodynamic model is used to simulate the hydrodynamics of aquaculture pond under the same area of rectangular-shaped and square-shaped culture ponds with different quantities and positions of the paddlewheel, respectively. Dead zone was defined as V≤ 0.02m/ sec. The uniformity of flow field was investigated by the ratio of dead zone. The results show that in the case of the improved distribution of paddlewheel in shrimp culture ponds, it is better to use two sets of paddlewheel （N2c）and three paddlewheel （N3f）compared with the original condition. For the same area of the rectangular-shaped and square-shaped culture ponds, the better cases placed one or two of paddlewheel, and three paddlewheel were R1g, R2d, R3a, S1f, S2d and S3a. The dead zone of the square-shaped culture ponds is lower than the narrow-rectangular culture ponds under the same area. If we want to reduce the ratio of dead zone in the existing narrow-rectangular culture ponds（3450 m^2 ）, the aspect ratio less than 0.47,it should be placed at least two or more paddlewheel sets. However, the electricity costs will also rise when the number of paddlewheel increase. The future goal on this model can be used to evaluate the optimum design of the shape of culture pond and optimum position of the paddlewheel.
| Identifer | oai:union.ndltd.org:TW/097NCKU5083040 |
| Date | January 2009 |
| Creators | Ping-Chiao Kuo, 郭平巧 |
| Contributors | Hwung-Hweng Hwung, 黃煌煇 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 85 |
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