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題名 | 氣候變遷對灌溉需水量之影響=The Influence of Climate Change on Irrigation Water Requirements |
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作者 | 童慶斌; 連宛渝; | 書刊名 | 農業工程學報 |
卷期 | 46:1 2000.03[民89.03] |
頁次 | 頁57-68 |
分類號 | 430.1637 |
關鍵詞 | 氣候變遷; 全球暖化; 溫室效應; 蒸發散; 水資源; Climatic change; Global warming; Greenhouse effect; Evapotranspiration; Water resouces; |
語文 | 中文(Chinese) |
中文摘要 | 臺灣農業用水量佔了百分之七十以上, 尤其灌溉用水為所有標的用水量之最大宗 ,因此,評估合理之灌溉需水量是重要的課題。作物需水量與氣候條件息息相關,如果未來 氣候條件發生改變時,灌溉用水量會受到影響,進而影響水資源調配。本研究建立一水田灌 溉需水量評估模式,進行模擬在不同氣候條件下灌溉需水量之改變。模擬結果顯示,利用累 積生育度數預測生長期下,全年灌溉需水量約減少 13 %∼ 20 %,但部分生長階段之大幅 增加值得注意; 利用固定天數於生長期預測,則灌溉需水量約增加 4 ∼ 14 %以反應溫度 升高導致之蒸發散量增加。利用固定天數預測生長期無法反應氣候變遷對生長期之影響,因 此可能導致錯誤之結論。 |
英文摘要 | Agriculture uses about 70% of total water uses in Taiwan, and irrigation is a major user. Thereofore, estimate of rational irrigation water requirement is an important issue. Crop water requirement is closely related to climate. Climate change will directly impact agricultural water uses, and further influence water resources management. A simulation model was developed in this study to evaluate irrigation water for paddy field. The model was applied to evaluate the changes of irrigatino water requirement under different future climate conditions. Simulated results indicate that water requirements decrease 13-20% with using fixed growing degree days to predict growth stages. However, the increase of water requirement for early growth stages is desired more attentions. On the other hand, using fixed days predicts increase of 4-14% of irrigation water requirement to reflect increased evapotranspiration due to higher temperature. Because using fixed days can not project the climate change impacts on the length of growth stages, simulation results might lead to wrong conclusions. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。