| Summary: | 碩士 === 國立屏東科技大學 === 土木工程系碩士班 === 94 === This article focuses on the characteristics of the constructed wetland of Dapeng Village, including the effects of ground water, infiltration, tides, and surface water. Water balance method is used to determine the hydrologic conditions, in order to further study and evaluate the effectiveness of flood detention in the cachement area of downriver constructed wetland. Suggestions are provided concerning the future development and management of the semi-tidal wetland.
The study shows that the main water contained in the wetland of low permeable soil results from rain and the water saturation caused by nearby fish ponds, while vaporization is the main cause of water loss. During the period of research, the water of the wetland was first pumped out and then it was reconstructed. Currently the wetland area under research is 2.5m in depth, with 184,500m3 of water-storage capability. To analysis the 5-year return period as the standard of flood prevention, the drainage channels can be handled 43.79cms of peak discharge, and the total flood peak runoff is 30,2163m3, which means that currently this area possesses limited ability in dealing with flood detention. To considerate the effects from tides, the water current on drainage channels will be under 18 minutes of detention. When the tide rises, the ineffective water drainage will not reach the flood detention standard in the Soil and Water Conservation Technical Standards.
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