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標題: 台中港海岸飛砂量推估之研究
A Study on the Estimate Wind Blown Sand in Taichung Harbor
作者: 吳昌翰
Wu, Chang-Han
關鍵字: 飛砂量;wind blown sand;BSNE;風速;風洞試驗;BSNE;wind velocity;wind tunnel.
出版社: 水土保持學系所
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The purpose of this study proposed herein is to research which understand about grain size, grain density, grain water content, wind velocity and wind blown sand in Taichung Harbor, at one time we observing the wind blown sand and wind velocity by sand sampler and multi-layer anemometer, further, estimates wind blown sand by
Kawamura dimension analyze.
The results of data by regression analysis that can be derived by power expression between wind velocity and wind blown sand, the grain size, grain density have negative relationship with wind blown sand, however, grain water content have no relationship with wind blown sand at 0.3% water content, moreover, the BSNE is closed than H-2 to estimates fluctuation of sand dune in Taichung Harbor. Two adjust estimates equation of wind blown sand by
BSNE sand sampler
(Q / d50 * U0.2 * σ) = 6.56 * 10-4 * ( U0.2^2 / g * d50 * σ/ρ )^0.8458(1)
H-2 sand sampler
(Q / d50 * U0.2 * σ) = 2.5 * 10-4 * ( U0.2^2 / g * d50 *σ/ρ )^0.7214(2)

Key Words : wind blown sand, BSNE, wind velocity, wind tunnel.

經由線性迴歸分析,綜合研究所得結果得知,風速與飛砂量呈指數極顯著關係,而砂粒密度及中值粒徑則與飛砂量呈負相關;又飛砂量與0.3 %極低含水率之砂粒,彼此間並無顯著關係;再者,BSNE集砂器較H-2集砂器之觀測結果更接近中島因次分析推估之飛砂量;將二種不同型式集砂器分析所得之飛砂量推估式,經由率定修正後為:
(Q/ d50 * U0.2 * σ) = 6.56 * 10-4 * ( U0.2^2 / g * d50 * σ/ρ )^0.8458(1)
(Q/ d50 * U0.2 * σ) = 2.5 * 10-4 * ( U0.2^2 / g * d50 * σ/ρ )^0.7214 (2)

其他識別: U0005-2308200613422500
Appears in Collections:水土保持學系

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