碩士 / 國立中興大學 / 水土保持學系所 / 99 / This study Applied FDM (Fugitive Dust Model) to simulate the condition at Jhuoshuei River estuary. The experimental section of Jhuoshuei River from Ziqiang Bridge to Xiluo Bridge were selected as the scope of simulation to testify the data gather on site. The nearby Lunbei, Erlin and Douliou Meteorology Stations were selected for simulating and comparing meteorological data before plotting and deciding based on the simulation values that were treated by ArcGIS.
The appropriate parameters and weather data should be inputted required to verify FDM. The six parameters included as, spacing between receptors, height of emission, receptor height, height of mixed layer, stability and air temperature were tested in different conditions them. For meteorological data, the wind speeds, wind directions, stability, mixed layer heights and temperatures of the seasons in 2009 were used.
According to the parameter test results, the spacing between receptors did not affect the simulation, because FDM is an algorithm of dispersion model. The results obtained with the height less than 20 m were more accurate; the density of fugitive dust did not differ much when the receptor was below 5 m and decreased with the increase of height when the receptor was above 5 m. A mixed layer higher than 200 m scarcely affected the simulation results. The density of fugitive dust increased with the degree of stability and dropped linearly with the rise of termperature.
The test results of meteorological data were tested with the on-site data in Jhuoshuei River to obtain the correctional coefficients that were required, whereby to conduct other simulations. As a result of simulation and comparison of the meteorological data, the simulated values were closest to those at Lunbei station with accuracy as high as 70%. In respect to the simulation results of different seasons, the results at Lunbei Station were better for the seasons of spring, autumn and winter. In addition, as the northwestern wind is scarce around the Jhuoshuei River, the weather data at Douliou Station were not suitable for the simulation of this region.
| Identifer | oai:union.ndltd.org:TW/099NCHU5080095 |
| Date | January 2011 |
| Creators | Tian-Cih Chen, 陳天慈 |
| Contributors | 黃隆明 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 135 |
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