| Summary: | 碩士 === 國立中央大學 === 土木工程研究所 === 92 === ABSTRACT
In this study, fractal theory is applied to discuss the habitat distribution in the upstream Wu River. Collecting references were addressed on quantifying the ecological habitat. The habitat is analyzed by two model, HEC-RAS 3.0 and RHABSIM 2.2, simulating flow between 5cms and 180cms. This research makes use of box counting algorithm to analyze fractal dimension of pool, riffle, run and glide. Moreover, mean fractal dimension is estimated to represent the complexity of all patches in riverine habitat. This research discusses fractal dimension, the areas of habitat in river, diversity, and their temporal and spatial variety. Finally, in this study proposes the habitat index (HI) to determine the condition of riverine habitat from 1987 to 2001. The result shows that the fractal dimension is between 2.0 and 2.6, which represents the complexity of edge of habitats.
In a word, this research approach is proven to be feasible to apply fractal dimension and habitat diversity to analyze the variety of habitat in the different years. This method provides an efficient way to address ecological condition in natural rivers.
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