碩士 / 國立中央大學 / 土木工程研究所 / 82 / A two-dimensional depth-averaged mathematical model for
pollutant transport in coastal waters is constructed in this
study. This model employs weighted residual of finite element
method to derive the element equation, and utilizes the
correclation between nodes to assembly the element equations
and the matrix equation of system. The nonlinear terms and
unsteady terms are treated by using the newton-raphson method
and the implicit method, respectively. This model is
verified in a research area, located at sea territory
outside Taoyuan county. Three current stations are installed
in the area, two of them located at off-shore area, the third
is in the nearshore area. The observed data of off- shore
ones are employed as the input boundary conditions, andthe
data of inner one are used as the check-up of the
modelling results. Meanwhile various oceanic parameters are
evaluated for their effects in modelling. The optimum E value
is found to be 200 (m2/s). Both wind shear stress and the
Coriolis'' force could be ignored due to their trivial effects
in modelling. This model also simulates the dispersion and
transportation characteristics of the pollutants in the
concerned sea territ- ory by considering the pollution either
from river outlet or from a ocean outfall at assumed water
depth. The concentration distribution under the effects of
tidal action and turbulent dispersion are discussed. The
results show that the pollutants will oscillate along shore
direction as the sea current flows to and fro. The contours
of pollutant concentration vary periodically with the
driving tidal motions.
| Identifer | oai:union.ndltd.org:TW/082NCU00015003 |
| Date | January 1994 |
| Creators | Lee Chung Yen, 李中彥 |
| Contributors | Chou Hsien Ter, 周憲德 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 71 |
Page generated in 0.0146 seconds