查詢結果分析
來源資料
頁籤選單縮合
題名 | Select a Suitable Method for Potential Evapotranspiration Determination=選擇一種適當評估潛在蒸發散量的方法 |
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作者 | 蔡秀隆; Tsai, Shiow-long; Ngoundo,Molengar; |
期刊 | 中華農學會報 |
出版日期 | 20031200 |
卷期 | 4:6 2003.12[民92.12] |
頁次 | 頁575-588 |
分類號 | 434.287 |
語文 | eng |
關鍵詞 | 潛在蒸發散量(ET[feeb]); 需水量; 灌溉計畫; Penman-Monteith估算法; Potential evapotranspiration; ET[feeb] program; Water requirement; Irrigation planning; Penman-Monteith method; |
中文摘要 | 依據屏東科技大學長期記錄的氣象資料,以Penman-Monteith法、 Makkink法與蒸發盤估算法評估潛在蒸發散量(ETo)。發現Penman-Monteith法和Makkink法估得的潛在蒸發散量與蒸發盤估算法所得的結果有顯著的差異。以蒸發盤估算法估得的潛在月蒸發散量在十二月份是55.8 mm (1.80 mm day¯¹)最低,七月份98.9 mm (3.19 mm day¯¹)最高,年潛在蒸發散量919.8 mm (2.52 mm day¯¹)。Penman-Monteith法估得的最低潛在月蒸發散量是在二月份70.0 mm (2.50 mm day¯¹, 六月份131.1 mm (4.23 mm day¯¹)最高,年潛在蒸發散量1200.9 mm (3.29 mm day¯¹)。Makkink法估得的潛在蒸發散量均比前兩法高,最低潛在月蒸發散量是在二月份70.8mm (2.53 mm day¯¹),最高是在六月份142.8 mm (4.76 mm day¯¹),年潛在蒸發散量是1292.10 mm (3.54 mm day¯¹)。由分析結果得知Penman-Monteith估算法比較適合評估潛在蒸發散量,因為它的變異係數最小(9.90 to 19.64)。因此,在灌溉系統裡Penman-Monteith估算法可以作為改良作物水分利用效率的最適管理工具。 |
英文摘要 | Using long-term climatological data from National Pingtung University of Science and Technology in Taiwan, the monthly potential evapotranspiration was studied by comparing the Penman-Monteith and Makkink methods with Pan evaporation method. The potential evapotranspirations (ETo) calculated by Penman-Monteith and Makkink were significantly different from those determined by Pan evaporation from the National Pingtung University of Science and Technology (NPUST) meteorological station. The mean monthly ETo of NPUST station ranged from 55.8 mm (1.80 mm day¯¹) in December to 98.9 mm (3.19 mm day¯¹) in June, and the 12-year annual average was 919.8 mm (2.52 mm day¯¹). The means monthly ETo from Penman-Monteith method ranged from 70.0 mm (2.50 mm day¯¹) in February to 131.1 mm (4.23 mm day¯¹) in June with annual average of 1200.9 mm (3.29 mm day¯¹), while mean monthly evapotranspiration from Makkink method ranged from 70.8 mm (2.53 mm day¯¹) in February to 142.8 mm (4.76 mm day¯¹) in June with annual average of 1292.10 mm (3.54 mm day¯¹). The analytical results indicate the Penman-Monteith method that there is reliable because of its smallest coefficient of variation (9.90 to 19.64). Therefore, the Penman-Monteith method can be used as a management tool to improve crop water use efficiency under irrigation systems. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。