| Summary: | 碩士 === 國立中興大學 === 水土保持學系所 === 96 === In the past, most of the streams and rivers training focused on flood control in Taiwan. We often use the methods from the United States, Japan and some other advanced conturies, but the geology, river characteristic and some other qualifications in Taiwan are different from those contries, so it’s easy to harm and disturb habitat.
This research based on classification of river morphology with five levels, use river habitat physical environment assessment method to process the investigation and evaluation of Wu River and Jhuoshuei River. And divided the area into natural habitat and artificial habitat. Through level one to level four to analyze river morphology, using level five to analyze the components of physical habitat. To contribute confidence interval by the evaluate result of natural habitat. According to the result of artificial habitat and the spots in confidence interval to discuss the influence and reason of the structure in all kinds river morphology. And score along the stream.
According to the calculation and analysis of classification of river morphology with five levels, there are 249 places and 13 kinds of river morphology in the area. The influence by the same height lateral construction in different river width becomes less and less from upstream to downstream. The physical influence of lateral construction under the same river morphology but different height will decrease as the height gets less. The greater height difference the damage to the vertical continuance of habitat will be much more obviously. To set longitudinal construction on upstream has much effect to physical habitat. It showed on vegetation and landform. To build longitudinal construction will cut down the continuance between two coasts. The vegetation is not easy to grow, some places because of the strong construction of cement revetment, make safer and steadier. In the midstream area two banks of the place with longitudinal construction usually construct sand bars, but the mainly vegetation on sand bar is herb. It showed the influence to prevent the lateral continuance of habitat. In the downstream, there are big flood plains between water flowing area and longitudinal construction, the influence is not much.
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