碩士 / 國立臺灣大學 / 土木工程學研究所 / 87 / 3D Advection-Dispersion Model Research for the Tan-Shui River Mouth, Tidal affected river has strong variation in flow condition,topography and chemical composition. Cohesive sediment settles rapidly around the salt wedge. Sediment can adsorb contaminant throughadsorption. This research is to study the transport of contaminant through the interaction of contaminant and sediment coagulant.
water quality model is developed for heavy metal, DO, salinity, sediment etc.The model is applied to simulate the coastal area in Tanshui river by using body fitted coordinate and curvilinear coordinate systems to generate grids and to reflect the irregularities of the boundaries.
We found that the self cleaning ability in this 10Km river month reach is extra-ordinarily good due to the coagulation of
sediment triggered by salt wedge. As coagulant settles, contaminants is adsorpted and removed from the water column. Settled sediment can accumulate around the salt wedge where flow velocity is small. As salt wedge moves away, flow velocity as well as interface friction increases so the accumulated mud
again becomes the bed load.
| Identifer | oai:union.ndltd.org:TW/087NTU00015091 |
| Date | January 1999 |
| Creators | TzChau Pu, 蒲子超 |
| Contributors | KoFei Liu, 劉格非 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 100 |
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