碩士 / 國立臺灣海洋大學 / 海洋環境資訊學系 / 97 / Abstract
Ebb flow enters Nan Wan Bay from the western side and exits from the eastern side during the spring tides. In contrast, flood flow enters from the eastern side and exits from the western. Upwellng is developed by the pumping effect of cyclonic（anti-cyclonic） eddy. The studies of nutrients flow in and out Nan Wan Bay due to upwelling have been presented in many literatures over the years. However, the nutrient flux due to flow entering Nan Wan has not yet been studied systematically. Hence, in this study a vessel survey was designed to measure the nutrient flux of Nan Wan Bay.
This study shows that the net nutrient flux of NO3－, NO2－, and PO43 is sink, which means these nutrients flow into the Bay from outside. One of the reasons is that Nan Wan Bay possesses abundant primary productivity to demand strongly on those three nutrients. Further, the net nutrient flux of SiO2 is source; it means SiO2 flows out from inside Bay. It is revealed that SiO2 is mainly imported mostly from the landmass. Also, the flushing time of Nan Wan Bay is calculated as 1.625 tidal cycle by using the net nutrient flux of SiO2 measured in this study. The net nutrient flux of NH3 is a higher source; it means a larger amount of NH3 flows out from inside bay. The reason is NH3 is decomposed needed a longer duration. Moreover, N/P ratio being greater than 16 indicates that the water quality decreased, maybe due to the influence of anthropogenic effects.
| Identifer | oai:union.ndltd.org:TW/097NTOU5282020 |
| Date | January 2009 |
| Creators | Ching-Ho Su, 蘇清河 |
| Contributors | Hung-Jen,Lee, Pei-Jie,Meng, 李宏仁, 孟培傑 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 101 |
Page generated in 0.0012 seconds