碩士 / 國立臺灣大學 / 農業工程學系 / 82 / A mathematical model to describe the vertical temperature
distributions in shallow aquaculture ponds is presented from
the viewpoint of discrete, completelymixed, and horizontal
volume lumps assumptions. The theoretical and empirical
relationships applied to heat balance calculations in lakes,
reservoirs and waste treatment ponds are used to calculate the
energy exchange between pond surface and atmosphere. Energy
transfer between volume lumps is derived via the turbulent
mixing and the temperature gradient. A field measurement is
implemented in a milk fish pond during September 8-15, 1993.
Measurements included water temperature at different pond
depths and various meteorological factors (solar irradiance,
air temperature, relative humidity and wind velocity) in which
24-hr variations were analyzed. The responses from the model
solved by 4th-order Runge-Kutta method are found to compare
favorably with that from field measured results (the errors of
upper volume lumps are .plmin. 0.5℃, while .plmin. 1.5℃ for
the lower volume lumps). Therefore, the model is capable of
predicting water temperature at each volume lumps.
| Identifer | oai:union.ndltd.org:TW/082NTU00404031 |
| Date | January 1994 |
| Creators | Lin,Shang-Chyi, 林尚祺 |
| Contributors | LIao,Chung-Min, 廖中明 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 72 |
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