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題名 | 水田土地利用型態對區域性微氣候之影響評估=Impact Assessment of Paddy-Field Land Use on Regional Microclimate |
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作者姓名(中文) | 吳富春; 楊國鑫; | 書刊名 | 農業工程學報 |
卷期 | 49:2 2003.06[民92.06] |
頁次 | 頁53-68 |
分類號 | 430.1633 |
關鍵詞 | 水田; 土地利用; 區域性微氣候模式; 影響評估; Paddy field; Land use; Regional microclimate model; Impact assessmant; |
語文 | 中文(Chinese) |
中文摘要 | 本研究擴充過去發展之垂直一維微氣候模式,建立區域性二維微氣候模式,可同時考慮垂直方向熱擴散與水平方向熱對流之平衡,以探討田區之不同土地利用型態對區域性微氣候之影響。本研究所發展之區域性二維微氣候模式乃利用熱交換區之概念計算兩種不同土地利用區域間之熱交流,並可針對兩種以上不同之土地利用區域進行區域性三維微氣候模擬。本研究利用二維微氣候模式針對雲林莿桐試驗田區之不同土地利用策略進行二維與三維微氣候模擬,模擬結果顯示田區之土地利用型態對鄰近社區上方之氣溫分布有相當大之影響。迎風面之土地利用對社區微氣候有直接顯著之影響,而處於非迎風面之土地利用對社區微氣候之影響較為間接。迎風面之土地利用地表含水量愈高、面積愈大,對鄰近社區上方之降溫效果愈大,反之迎風面之土地利用地表含水量愈低、面積愈小,則對鄰近社區上方之降溫效果愈小。若迎風面之土地利用為水稻田時,鄰近社區上方0.5~1公尺以下部分氣溫偏高,但對人體感受之氣溫(1~2公尺部分)則具有降溫之效果。 |
英文摘要 | In this study we extend the previous vertical 1-D microclimate model to develop a regional 2-D model that incorporates the heat balance between vertical heat diffusion and horizontal heat convection. The proposed model is used to investigate the impact of paddy-field land use on regional microclimate. The concept of heat exchange region is employed in the 2-D model for calculating the heat transfer between two areas with different types of land use. The model can be also used in the 3-D microclimate simulation for areas with more than two different types of land uses. The proposed model is further used in the 2-D and 3-D simulations of different land-use strategies for the Chi-Tung experimental paddy-field area in Yun-Lin County. The simulation results reveal that the effect of paddy-field land-use pattern on the microclimate of neighboring community is significant. The upwind land use has a direct effect on the microclimate of neighboring community, whereas the non-upwind land use only has a minor effect on the community microclimate. The higher the ground-surface moisture content and the larger the area in the upwind land use, the greater the cooling effect on the community air temperature. If the upwind land use remains as a paddy field, the air temperature approximately 0.5 to 1 m above the community ground surface becomes higher, but the human-body sensed temperature (1 to 2 m above ground surface) is lowered. |
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