| Summary: | 碩士 === 國立成功大學 === 土木工程學系碩博士班 === 101 === Wetlands are with the major functions of purification of water, regulation of flood, protection of the shoreline, conservation of the ecology. In recent years, issue of the biodiversity has become the valve of all around the world. This study the abandoned salt pan in Taijiang National has been selected. It is expect that by using the technology of ecological engineering to restore the original natural of the wetlands and to enhance the biodiversity of the wetlands.
Therefore, for the process of the ecology restoration in the salt pan, a suitably hydrological environment has to be constructed; so that the steady water cycles can be conducted in the network of the irrigated conduits. As the salinity in soil decreases to a certain extent, living creature can then be able to live in this environment and begin to multiply.
However, the first job for the restoration of salt pan is to decrease the salinity in soil of the salt pan. In this study, the scenario of the penetration of water from both sides of a conduit into the soil is simulated by using the COMSOL software. The effects of initial velocities of water penetration and the void ratios of the soil to the seepage in soil are also investigated.
The results indicated that the changes of the flow velocity effect significantly on seepage velocities; however, soil porosities are with less effect. In addition, the distribution of seepage in soil is more uniform as water with low velocity flow through into the soil with high porosity.
The research results can be used as a subsequent salt pan water network planning basis, in order to be able to build salt pan wetlands and promotion of the quality of ecology.
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