| Summary: | 碩士 === 逢甲大學 === 水利工程與資源保育研究所 === 96 === The forest resources in high mountain area are variety and wide, which also passed through by some streams. LWD in the steam is caused by the wood forest of natural death, landslide, wild fire, and other cautions. According to the Count of Veterans Affairs Commission, the erosion and the deposition of the Channel morphology is affected by the deposition of the 10% wood forest, which will become LWD in the stream every year. The function of the channel and habitat enhancement is proved by the examinations and the studies in the foreign countries. But, there are fewer references about it in Taiwan. This topic is aimed to study the spatital distribution characteristic of LWD in the channel of mountain area.
By the study，we get the effects of channel width and sinuosity are very obvious, but effect of slope is no longer obvious, and LWD deposion is strongly influenced by landslide area. According data, the LWD deposion are classified into five types. And we use Artificial Neural Network to construct a forecast model. The simple forecast model can forecast LWD deposion, and it have 80% higher accuracy.
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